Renesas RL78/G13, RL78/G23 User manual

Application Note

RL78/G13, RL78/G23

Migration Guide from RL78/G13 to RL78/G23

Introduction

This application note describes the differences in peripheral functions between RL78/G13 and RL78/G23.

Target Device

RL78/G13, RL78/G23

For detailed information on peripheral functions and electrical characteristics, refer to the User's Manual: Hardware and Technical Updates.

When using this application note with other Renesas MCUs, careful evaluation is recommended after making modifications to comply with the alternate MCU.

R01AN5378EJ0100 Rev.1.00 Page 1 of 24 Apr.13.21

RL78/G13, RL78/G23 Migration Guide from RL78/G13 to RL78/G23

Contents

1. Differences in peripheral functions between RL78/G13 and RL78/G23.................................... 3

2. Comparison of RL78/G13 and RL78/G23 registers .................................................................. 6

2.1 Port Functions ......................................................................................................................................... 6

2.2 Clock Generator ...................................................................................................................................... 8

2.3 Timer Array Unit ...................................................................................................................................... 9

2.4 Realtime Clock ...................................................................................................................................... 10

2.5 Clock Output/Buzzer Output Controller ................................................................................................. 11

2.6 Watchdog Timer .................................................................................................................................... 11

2.7 A/D Converter ........................................................................................................................................ 12

2.8 Serial Array Unit .................................................................................................................................... 13

2.9 Serial Interface IICA .............................................................................................................................. 15

2.10 Interrupt Functions................................................................................................................................. 16

2.11 Key Interrupt Function ........................................................................................................................... 17

2.12 Standby Function................................................................................................................................... 17

2.13 Reset Function ...................................................................................................................................... 18

2.14 Power-On-Reset Circuit ........................................................................................................................ 18

2.15 Voltage Detector .................................................................................................................................... 19

2.16 Safety Functions .................................................................................................................................... 20

2.17 Regulator ............................................................................................................................................... 20

2.18 Option Bytes .......................................................................................................................................... 21

2.19 On-Chip Debugging ............................................................................................................................... 21

2.20 BCD Correction Circuit .......................................................................................................................... 21

3. Other changes and notes ...................................................................................................... 22

3.1 RL78/G23 instruction set ....................................................................................................................... 22

4. Documents for Reference ...................................................................................................... 23

Revision History ............................................................................................................................ 24

R01AN5378EJ0100 Rev.1.00 Page 2 of 24 Apr.13.21

RL78/G13, RL78/G23 Migration Guide from RL78/G13 to RL78/G23

RL78/G13

RL78/G23

Function name

Main differences from

RL78/G13

current for some pins.

switching

Clocks

Clock Generator

- Added middle-speed on-chip

32.768kHz.

Timer Array Unit

Added an event input from ELCL.

Realtime Clock

None

4,660 hours.)

Clock Output/ Buzzer Output

Clock Output/Buzzer

None (WDT)

pins.)

1. Differences in peripheral functions between RL78/G13 and RL78/G23

Table 1.1 and Table 1.3 show the main differences in peripheral functions between RL78/G13 and

RL78/G23.

However, differences due to changes in the settings of the CPU core, peripheral functions, and clock

generation circuit are not considered. For details, refer to the User's Manual: Hardware of each product.

Table 1.1 Differences in peripheral functions between RL78/G13 and RL78/G23 (1/3)

Item

Ports Port Functions Port Functions - Added output current control

port.

- Enhanced low-level output

Flash operation mode

Timers

12-bit Interval Timer 32-bit Interval Timer Changed function

Output Controller

Watchdog Timers

A/D Converter A/D Converter A/D Converter - Added 12-bit resolution.

Watchdog Timer Watchdog Timer Changed overflow time.

－

Operation State Control Additional function

oscillator.

- Changed frequency (fIL) of lowspeed on-chip oscillator to

(Capable of measuring up to

Output Controller

- Capable of selecting Digital I/O or analog input for each pin. (This pin function selection applies also to ANI0 to ANI15

Note : Additional peripheral functions : Changed peripheral functions

: Deleted peripheral functions －: There is no corresponding function.

Caution. For details on peripheral functions, usage and electrical characteristics, refer to the User's Manual:

Hardware.

R01AN5378EJ0100 Rev.1.00 Page 3 of 24 Apr.13.21

RL78/G13, RL78/G23 Migration Guide from RL78/G13 to RL78/G23

RL78/G13

RL78/G23

Function name

Main differences from

RL78/G13

D/A Converter

Additional function

Comparator

Additional function

Clock Synchronous)

Serial Array Unit

Added UART loopback function

I2C bus interface

IICA

Added all address match function

Remote Control Signal Receiver

Receiver (REMC)

Accumulator

Multiplier and

Deleted item

instructions.)

Functions

Access) Controller

Controller)

Table 1.2 Differences in peripheral functions between RL78/G13 and RL78/G23 (2/3)

Item

－

Serial Interface (Clock Asynchronous,

Serial Array Unit

UARTA Additional function

(computing unit)

Data Transfer

linkage operation between peripheral functions without CPU

－

Divider/MultiplyAccumulator

DMA (Direct Memory

－

Remote Control Signal

－

DTC (Data Transfer

Logic and Event Link Controller (ELCL)

Additional function

(Added multiply & accumulate

Changed function

Additional function

Note : Additional peripheral functions : Changed peripheral functions

: Deleted peripheral functions －: There is no corresponding function.

Caution. For details on peripheral functions, usage and electrical characteristics, refer to the User's Manual:

Hardware.

R01AN5378EJ0100 Rev.1.00 Page 4 of 24 Apr.13.21

RL78/G13, RL78/G23 Migration Guide from RL78/G13 to RL78/G23

RL78/G13

RL78/G23

Function name

Main differences from

RL78/G13

Interrupts

Interrupt Functions

Changed interrupt sources.

detection edge.

supply to RAM.

power-on reset has occurred.

Power-On-Reset Circuit

Changed reset processing time.

values.

- Added UART loopback function.

encryption function

Processing execution

of CPU

SNOOZE Mode

Additional function

sensor

internal regulator.

Select Areas

and Flash operating modes.

Flash Memory

Changed specifications, such as block size.

On-Chip Debugging

Changed dedicated emulators.

Circuit

Table 1.3 Differences in peripheral functions between RL78/G13 and RL78/G23 (3/3)

Item

Key Interrupt Function Key Interrupt Function - Added a function to select key

Interrupt detection pins.

- Added a function to select

Reduced system operating current

Resets Reset Function Reset Function Added a function to confirm that a

Voltage Detector (LVD)

Safety Functions Safety Functions Safety Functions - Added a function to prevent Flash

Security function,

function independent

Capacitive touch/proximity

Standby Function Standby Function - Added a function that starting of

high-speed on-chip oscillator is at high speed.

- Added a function to stop power

Voltage Detector Voltage Detector - Equipped with 2 channels.

- Changed detection voltage

rewriting when CPU goes out of control.

- Added a function to detect digital output signal level for I/O pins.

－

Security Function Additional function

Sequencer

Capacitive Sensing Unit Additional function

Regulator Regulator Regulator Changed an output voltage value of

Option Function

BCD Correction

Note : Additional peripheral functions : Changed peripheral functions

: Deleted peripheral functions －: There is no corresponding function.

Caution. For details on peripheral functions, usage and electrical characteristics, refer to the User's Manual:

Hardware.

R01AN5378EJ0100 Rev.1.00 Page 5 of 24 Apr.13.21

Option Bytes Option Bytes Changed functions of WDT, LVD,

BCD Correction Circuit BCD Correction Circuit None

RL78/G13, RL78/G23 Migration Guide from RL78/G13 to RL78/G23

RL78/G13

RL78/G23

Register name

Remark

register

Port registers (Pxx)

None

(PUxx)

Addition of PIM84 bit to PIM8 register.

Addition of POM120 bit to POM12 register.

Port digital input disable registers (PDIDISxx)

New addition (PMCxx)

(PMCAxx)

(PMCTxx)

(PMCExx)

A/D port configuration register (ADPC)

Deleted item

2. Comparison of RL78/G13 and RL78/G23 registers

Table 2.1 to Table 2.19 show register comparison between RL78/G13 and RL78/G23 for peripheral functions other than additions, changes and deletions described in chapter "1. Differences in peripheral functions between RL78/G13 and RL78/G23". For details of each register function, refer to the User's Manual: Hardware.

Also, the registers and bits mounted on the microcontroller differ depending on the product. For the registers and bits mounted in each product, refer to the User's Manual: Hardware.

2.1 Port Functions

Table 2.1 Registers Controlling Port Function (1/2)

Port mode registers (PMxx) Port mode registers (PMxx) Addition of PM121 and PM122 bits to PM12

Pull-up resistor option registers (PUxx)

Port input mode registers (PIMx)

Port output mode registers (POMx)

－

Port mode control registers

－

Pull-up resistor option registers

Port input mode registers (PIMxx)

Port output mode registers (POMxx)

Port mode control A registers

Port mode control T registers

Port mode control E registers

－

Addition of PU121 and PU122 bits to PU12 register

Addition of PIM33 bit to PIM3 register. Addition of PIM41 bit to PIM4 register. Addition of PIM71 bit to PIM7 register.

Addition of POM34 bit to POM3 register. Addition of POM42 bit to POM4 register. Addition of POM72 bit to POM7 register. Addition of POM83 bit to POM8 register.

Changed applicable pins

New addition

Note : The register name is unchanged. : Additional contents : Changed contents

: Deleted contents －: There is no corresponding register.

Caution. For details of each register function, refer to the User's Manual: Hardware.

R01AN5378EJ0100 Rev.1.00 Page 6 of 24 Apr.13.21

RL78/G13, RL78/G23 Migration Guide from RL78/G13 to RL78/G23

RL78/G13

RL78/G23

Register name

Remark

register (PIOR)

Global digital input disable

Global digital input disable register (GDIDIS)

None register (CCDE)

(CCSx)

Port overdrive register (PTDC)

New addition

Port function output enable registers (PFOEx)

New addition Port mode select register (PMS)

New addition

Table 2.2 Registers Controlling Port Function (2/2)

Peripheral I/O redirection register (PIOR)

register (GDIDIS)

－

Peripheral I/O redirection

Output current control enable

Output current select registers

None

New addition

Note : The register name is unchanged. : Additional contents : Changed contents

: Deleted contents －: There is no corresponding register.

Caution. For details of each register function, refer to the User's Manual: Hardware.

R01AN5378EJ0100 Rev.1.00 Page 7 of 24 Apr.13.21

RL78/G13, RL78/G23 Migration Guide from RL78/G13 to RL78/G23

RL78/G13

RL78/G23

Register name

Remark

(CMC)

Addition of MCS1 bit to bit 1.

Clock operation status control register (CSC)

Addition of MIOEN bit to bit 1 status register (OSTC)

status register (OSTC)

register (OSTS)

Peripheral enable register 0 (PER0)

Change of bit 7 to RTCWEN bit

Peripheral enable register 1 (PER1)

New addition

values.

(CKSEL)

frequency select register (HOCODIV)

Middle-speed on-chip oscillator frequency select register (MOCODIV)

New addition register (MOSCDIV)

register (HIOTRM)

trimming register (MIOTRM)

Low-speed on-chip oscillator trimming register (LIOTRM)

New addition (WKUPMD)

2.2 Clock Generator

Table 2.3 Registers Controlling Clock Generator

Clock operation mode control register

System clock control register (CKC) System clock control register (CKC) Addition of MCM1 bit to bit 0.

Oscillation stabilization time counter

Oscillation stabilization time select

－

Subsystem clock supply mode control register (OSMC)

－

High-speed on-chip oscillator

－

Clock operation mode control register

Oscillation stabilization time counter

Oscillation stabilization time select

Subsystem clock supply mode control register (OSMC)

Subsystem clock select register

High-speed on-chip oscillator

High-speed system clock division

Addition of XTSEL bit to bit 3

None

Addition of HIPREC bit to bit 0. Change of bits 1 and 2 to undefined

New addition

None

New addition

High-speed on-chip oscillator trimming

－

High-speed on-chip oscillator trimming

Middle-speed on-chip oscillator

Standby mode release setting register

None

New addition

Note : The register name is unchanged : Additional contents : Changed contents

: Deleted contents －: There is no corresponding register.

Caution. For details of each register function, refer to the User's Manual: Hardware.

R01AN5378EJ0100 Rev.1.00 Page 8 of 24 Apr.13.21

RL78/G13, RL78/G23 Migration Guide from RL78/G13 to RL78/G23

RL78/G13

RL78/G23

Register name

Remark

to RTCWEN bit.

(PRR0)

Timer clock select register m (TPSm)

None

Timer mode register mn (TMRmn)

None

Timer status register mn (TSRmn)

None

register m (TEm)

Timer channel start register m (TSm)

None

Timer channel stop register m (TTm)

None

Timer input select register 0 (TIS0)

None

Timer input select register 1 (TIS1)

New addition

Timer output enable register m (TOEm)

None Timer output register m (TOm)

Timer output register m (TOm)

None

Timer output level register m (TOLm)

None

(TOMm)

Input switch control register (ISC)

Addition of ISC2 to ISC7 bits to bits 2 to 7.

(NFEN1, NFEN2)

(PMCAxx)

(PMCTxx)

Port mode control E register (PMCExx)

New addition

Port mode register (PMxx)

PM12 register.

Port register (Pxx)

None

Port function output enable register 0 (PFOE0)

New addition

2.3 Timer Array Unit

Table 2.4 Registers Controlling Timer Array Unit

Peripheral enable register 0 (PER0) Peripheral enable register 0 (PER0) No change for bits 0 and 1 (TAU0EN,

TAU1EN) used to set this peripheral function. However, bit 7 is changed

－

Timer channel enable status

－

Timer output mode register m

Noise filter enable registers 1, 2

Port mode control register (PMCxx) Port mode control A register

Peripheral reset control register 0

Timer channel enable status

Timer output mode register m

Noise filter enable registers 1, 2

New addition

None

Change of applicable pins

－

Port mode control T register

New addition

Addition of PM121 and PM122 bits to

Note : The register name is unchanged. : Additional contents : Changed contents

: Deleted contents －: There is no corresponding register.

Caution. For details of each register function, refer to the User's Manual: Hardware.

R01AN5378EJ0100 Rev.1.00 Page 9 of 24 Apr.13.21

RL78/G13, RL78/G23 Migration Guide from RL78/G13 to RL78/G23

RL78/G13

RL78/G23

Register name

Remark

Peripheral enable register 0 (PER0)

Bit 7 is changed to RTCWEN bit.

undefined values.

Realtime clock control register 0 (RTCC0)

Addition of RTC128EN bit to bit 4 (RTCC1)

(RTCC1)

Second count register (SEC)

None

Minute count register (MIN)

None

Hour count register (HOUR)

None

Day count register (DAY)

None

Day-of-week count register (WEEK)

None

Month count register (MONTH)

None

Year count register (YEAR)

None

(SUBCUD)

Alarm minute register (ALARMWM)

None

Alarm hour register (ALARMWH)

None

Alarm day-of-week register (ALARMWW)

None added to bits 2 to 7.

Port register 3 (P3)

None

2.4 Realtime Clock

Table 2.5 Registers Controlling the Realtime Clock

Subsystem clock supply mode control register (OSMC)

Realtime clock control register 1

Time error correction register

Port mode register 3 (PM3) Port mode register 3 (PM3) No change for bit 0 (PM30) used to

Subsystem clock supply mode control register (OSMC)

Realtime clock control register 1

Time error correction register

No change for bit 4 (WUTMMCK0) used to set this peripheral function. However, HIPREC bit is added to bit

0. Bits 1 and 2 are changed to

None

set this peripheral function. However, PM32 to PM37 bits are

Note : The register name is unchanged. : Additional contents : Changed contents

: Deleted contents －: There is no corresponding register.

Caution. For details of each register function, refer to the User's Manual: Hardware.

R01AN5378EJ0100 Rev.1.00 Page 10 of 24 Apr.13.21

RL78/G13, RL78/G23 Migration Guide from RL78/G13 to RL78/G23

RL78/G13

RL78/G23

Register name

Remark

(CKSn)

(PM1, PM3, PM5, PM14)

Port registers 1, 3, 5, 14 (P1, P3, P5, P14)

None (PMCTxx)

(PMCExx)

RL78/G13

RL78/G23

Register name

Remark

(WDTE)

2.5 Clock Output/Buzzer Output Controller

Table 2.6 Registers Controlling Clock Output/Buzzer Output Controller

Clock output select registers n

Port mode registers 1, 3, 5, 14

－

Clock output select registers n

Port mode registers 1, 3, 5, 14

Port mode control T registers

Port mode control E registers

None

New addition

Note : The register name is unchanged. : Additional contents : Changed contents

: Deleted contents －: There is no corresponding register.

Caution. For details of each register function, refer to the User's Manual: Hardware.

2.6 Watchdog Timer

Table 2.7 Register Controlling Watchdog Timer

Watchdog timer enable register

None

Note : The register name is unchanged. : Additional contents : Changed contents

: Deleted contents －: There is no corresponding register.

Caution. For details of each register function, refer to the User's Manual: Hardware.

R01AN5378EJ0100 Rev.1.00 Page 11 of 24 Apr.13.21

RL78/G13, RL78/G23 Migration Guide from RL78/G13 to RL78/G23

RL78/G13

RL78/G23

Register name

Remark

bit 5 (ADCEN) used to set

is changed to RTCWEN bit.

(PRR0)

A/D converter mode register 0 (ADM0)

None Addition of ADLSP bit to bit 3.

Addition of ADTYP1 bit to bit 1.

conversion.

8-bit A/D conversion result register (ADCRH)

8-bit A/D conversion result register (ADCRnH)

Changed applicable pins register (ADS)

register (ADS)

limit setting register (ADUL)

upper limit setting register (ADUL)

limit setting register (ADLL)

lower limit setting register (ADLL)

A/D test register (ADTES)

None

(ADPC)

PMC12, PMC14)

PMCA11, PMCA12, PMCA14)

(PMCT0, PMCT3)

Port mode control E registers 0, 3 (PMCE0, PMCE3)

New addition PM12, PM14, PM15)

PM12, PM14, PM15)

2.7 A/D Converter

Table 2.8 Registers Controlling A/D Converter

Peripheral enable register 0 (PER0) Peripheral enable register 0

(PER0)

－

A/D converter mode register 1 (ADM1)

A/D converter mode register 2 (ADM2)

10-bit A/D conversion result register (ADCR)

Analog input channel specification

Conversion result comparison upper

Conversion result comparison lower

Peripheral reset control register 0

A/D converter mode register 1 (ADM1)

A/D converter mode register 2 (ADM2)

12-bit/10-bit A/D conversion result register (ADCRn)

Analog input channel specification

Conversion result comparison

No change for this peripheral function. However, bit 7

New addition

Addition of ADTRS2 bit to bit 2.

Bit 0 is changed to ADTYP0 bit.

- Changed the register name.

- Added 12-bit resolution A/D

None

A/D port configuration register

Port mode control registers 0, 3, 10, 11, 12, and 14 (PMC0, PMC3, PMC10, PMC11,

－

Port mode registers 0, 2, 3, 10, 11, 12, 14, and 15 (PM0, PM2, PM3, PM10, PM11,

－

Port mode control A registers 0, 3, 10, 11, 12, and 14 (PMCA0, PMCA3, PMCA10,

Port mode control T registers 0, 3

Port mode registers 0, 2, 3, 10, 11, 12, 14, and 15 (PM0, PM2, PM3, PM10, PM11,

Deleted item.

Changed applicable pins

New addition

Addition of PM121 and PM122 bits to PM12 register.

Note : The register name is unchanged. : Additional contents : Changed contents

: Deleted contents －: There is no corresponding register.

Caution. For details of each register function, refer to the User's Manual: Hardware.

R01AN5378EJ0100 Rev.1.00 Page 12 of 24 Apr.13.21

RL78/G13, RL78/G23 Migration Guide from RL78/G13 to RL78/G23

RL78/G13

RL78/G23

Register name

Remark

RTCWEN bit.

(PRR0)

Serial clock select register m (SPSm)

None

Serial mode register mn (SMRmn)

None

setting register mn (SCRmn)

Serial data register mn (SDRmn)

None

Serial flag clear trigger register mn (SIRmn)

None Serial status register mn (SSRmn)

Serial status register mn (SSRmn)

None

Serial channel start register m (SSm)

None

Serial channel stop register m (STm)

None

Serial channel enable status register m (SEm)

None (SOEm)

(SOEm)

Serial output level register m (SOLm)

None

Serial output register m (SOm)

None

Serial standby control register m (SSCm)

None to 7.

Noise filter enable register 0 (NFEN0)

None

2.8 Serial Array Unit

Table 2.9 Registers Controlling Serial Array Unit (1/2)

Peripheral enable register 0 (PER0) Peripheral enable register 0 (PER0) No change for bits 2 and 3 (SAU0EN,

SAU1EN) used to set this peripheral function. However, bit 7 is changed to

－

Serial communication operation

Serial output enable register m

Input switch control register (ISC) Input switch control register (ISC) Addition of ISC2 to ISC7 bits to bits 2

Peripheral reset control register 0

Serial communication operation

Serial output enable register m

New addition

None

Note : The register name is unchanged. : Additional contents : Changed contents

: Deleted contents －: There is no corresponding register.

Caution. For details of each register function, refer to the User's Manual: Hardware.

R01AN5378EJ0100 Rev.1.00 Page 13 of 24 Apr.13.21

RL78/G13, RL78/G23 Migration Guide from RL78/G13 to RL78/G23

RL78/G13

RL78/G23

Register name

Remark

PIM14)

Port output mode registers

Addition of POM42 bit to POM4

register.

(PMC0, PMC3, PMC14)

(PMCA0, PMCA3, PMCA14)

(PMCT0, PMCT3)

(PMCE0)

Port function output enable registers (PFOEx)

New addition PM9, PM14)

PM9, PM14)

(P0, P1, P3 to P5, P7 to P9, P14)

(ULBS)

Table 2.10 Registers Controlling Serial Array Unit (2/2)

Port input mode registers 0, 1, 4, 5, 8, 14 (PIM0, PIM1, PIM4, PIM5, PIM8,

0, 1, 4, 5, 7 to 9, 14 (POM0, POM1, POM4, POM5, POM7 to POM9, POM14)

Port mode control registers 0, 3, 14

－

Port mode registers 0, 1, 3 to 5, 7 to 9, 14 (PM0, PM1, PM3 to PM5, PM7 to

Port registers 0, 1, 3 to 5, 7 to 9, 14

－

Port input mode registers 0, 1, 4, 5, 8, 14 (PIM0, PIM1, PIM4, PIM5, PIM8,

0, 1, 4, 5, 7 to 9, 14 (POM0, POM1, POM4, POM5, POM7 to POM9, POM14)

Port mode control A registers 0, 3, 14

Port mode control T registers 0, 3

Port mode control E register 0

Port mode registers 0, 1, 3 to 5, 7 to 9, 14 (PM0, PM1, PM3 to PM5, PM7 to

Port registers 0, 1, 3 to 5, 7 to 9, 14 (P0, P1, P3 to P5, P7 to P9, P14)

UART loopback select register

Addition of PIM41 bit to PIM4 register. Addition of PIM84 bit to PIM8 register.

register. Addition of POM72 bit to POM7 register. Addition of POM83 bit to POM8

Changed applicable pins

New addition

None

New addition

Note : The register name is unchanged. : Additional contents : Changed contents

: Deleted contents －: There is no corresponding register.

Caution. For details of each register function, refer to the User's Manual: Hardware.

R01AN5378EJ0100 Rev.1.00 Page 14 of 24 Apr.13.21

RL78/G13, RL78/G23 Migration Guide from RL78/G13 to RL78/G23

RL78/G13

RL78/G23

Register name

Remark

RTCWEN bit.

(PRR0)

IICA control register n0 (IICCTLn0)

None

IICA status register n (IICSn)

None

IICA flag register n (IICFn)

None

IICA control register n1 (IICCTLn1)

Addition of SVADISn bit to bit 6.

IICA low-level width setting register n (IICWLn)

None register n (IICWHn)

register n (IICWHn)

Port mode register 6 (PM6)

None

Port register 6 (P6)

None

2.9 Serial Interface IICA

Table 2.11 Registers Controlling Serial Interface IICA

Peripheral enable register 0 (PER0) Peripheral enable register 0 (PER0) No change for bits 6 and 4 (IICA1EN,

IICA0EN) used to set this peripheral function. However, bit 7 is changed to

－

IICA high-level width setting

Peripheral reset control register 0

IICA high-level width setting

New addition

None

Note : The register name is unchanged. : Additional contents : Changed contents

: Deleted contents －: There is no corresponding register.

Caution. For details of each register function, refer to the User's Manual: Hardware.

R01AN5378EJ0100 Rev.1.00 Page 15 of 24 Apr.13.21

RL78/G13, RL78/G23 Migration Guide from RL78/G13 to RL78/G23

RL78/G13

RL78/G23

Register name

Remark

Interrupt request flag registers

Addition of IF3H register.

IF3L.

Interrupt mask flag registers

Addition of MK3H register.

MK2H and MK3L.

Priority specification flag

PR13H)

Addition of PR03H and PR13H.

External interrupt rising edge enable registers (EGP0, EGP1)

None

External interrupt falling edge enable registers (EGN0, EGN1)

None Program status word (PSW)

Program status word (PSW)

None

2.10 Interrupt Functions

Table 2.12 Registers Controlling Interrupt Functions

(IF0L, IF0H, IF1L, IF1H, IF2L, IF2H, IF3L)

(MK0L, MK0H, MK1L, MK1H, MK2L, MK2H, MK3L)

registers (PR00L, PR00H, PR01L, PR01H, PR02L, PR02H, PR03L, PR10L, PR10H, PR11L, PR11H, PR12L, PR12H, PR13L)

Note : The register name is unchanged. : Additional contents : Changed contents

: Deleted contents －: There is no corresponding register.

Caution. For details of each register function, refer to the User's Manual: Hardware.

(IF0L, IF0H, IF1L, IF1H, IF2L, IF2H, IF3L, IF3H)

(MK0L, MK0H, MK1L, MK1H, MK2L, MK2H, MK3L, MK3H)

registers (PR00L, PR00H, PR01L, PR01H, PR02L, PR02H, PR03L, PR03H, PR10L, PR10H, PR11L, PR11H, PR12L, PR12H, PR13L,

Change of the contents of IF0H, IF1L, IF1H (ITIF → ITLIF bit),

IF2L (PIF10 → FLIF bit), IF2H and

Change of the contents of MK0H, MK1L, MK1H (ITMK → ITLMK bit),

MK2L (PMK10 → FLMK bit),

Change of the contents of PR00H, PR10H, PR01L, PR11L, PR01H, PR11H (ITPR0, ITPR1 → ITLPR0, ITLPR1 bit), PR02L, PR12L (PPR010, PPR110 FLPR1 bit), PR02H, PR12H, PR03L and PR13L.

→ FLPR0,

R01AN5378EJ0100 Rev.1.00 Page 16 of 24 Apr.13.21

RL78/G13, RL78/G23 Migration Guide from RL78/G13 to RL78/G23

RL78/G13

RL78/G23

Register name

Remark

Key return control register (KRCTL)

New addition

Key return mode register (KRM)

Key return mode register 0 (KRM0)

Key return flag register (KRF)

New addition

Port mode register 7 (PM7)

None

RL78/G13

RL78/G23

Register name

Remark

Subsystem clock supply mode

undefined values.

Oscillation stabilization time counter status register (OSTC)

None

Oscillation stabilization time select register (OSTS)

None

Standby mode release setting register (WKUPMD)

New addition

Memory power reduction control register (PSMCR)

New addition

2.11 Key Interrupt Function

Table 2.13 Register Controlling the Key Interrupt

－

Changed applicable pins

－

Note : The register name is unchanged. : Additional contents : Changed contents

: Deleted contents －: There is no corresponding register.

Caution. For details of each register function, refer to the User's Manual: Hardware.

2.12 Standby Function

Table 2.14 Registers Controlling Standby Function

Addition of HIPREC bit to bit 0.

control register (OSMC)

－

Note : The register name is unchanged. : Additional contents : Changed contents

: Deleted contents －: There is no corresponding register.

Caution. For details of each register function, refer to the User's Manual: Hardware.

control register (OSMC)

Bits 1 and 2 are changed to

R01AN5378EJ0100 Rev.1.00 Page 17 of 24 Apr.13.21

RL78/G13, RL78/G23 Migration Guide from RL78/G13 to RL78/G23

RL78/G13

RL78/G23

Register name

Remark

Reset control flag register (RESF)

None

Power-on-reset status register (PORSR)

New addition

Peripheral reset control register 0 (PRR0)

New addition

Peripheral reset control register 1 (PRR1)

New addition

2.13 Reset Function

Table 2.15 Registers for Confirming Reset Sources

－

Note : The register name is unchanged. : Additional contents : Changed contents

: Deleted contents －: There is no corresponding register.

Caution. For details of each register function, refer to the User's Manual: Hardware.

2.14 Power-On-Reset Circuit

There is no register that controls the power-on-reset circuit.

R01AN5378EJ0100 Rev.1.00 Page 18 of 24 Apr.13.21

RL78/G13, RL78/G23 Migration Guide from RL78/G13 to RL78/G23

RL78/G13

RL78/G23

Register name

Remark

User option byte

(Settings related to LVD.)

User option byte

(Settings related to LVD.)

Changed functions of option bytes.

Voltage detection register

Bit 3 has been changed to DLVD1F bit.

LVD detection flag clearing register (LVDFCLR)

New addition

Voltage detection level register

Bit 7 is changed to LVD1EN bit.

2.15 Voltage Detector

Table 2.16 Registers Controlling Voltage Detector

000C1H／010C1H

000C1H／040C1H

Changed address when using the boot swap operation.

Bit 0 has been changed to LVD0F bit.

(LVIM)

－

(LVIS)

(LVIM)

(LVIS)

Bit 1 has been changed to LVD1F bit. Bit 2 has been changed to DLVD0F bit.

Bit 0 is changed to LVD1V0 bit. Bit 1 is changed to LVD1V1 bit. Bit 2 is changed to LVD1V2 bit. Bit 3 is changed to LVD1V3 bit. Bit 4 is changed to LVD1V4 bit. Bit 6 is changed to LVD1SEL bit.

Note : The register name is unchanged : Additional contents : Changed contents

: Deleted contents －: There is no corresponding register.

Caution. For details of each register function, refer to the User's Manual: Hardware.

R01AN5378EJ0100 Rev.1.00 Page 19 of 24 Apr.13.21

RL78/G13, RL78/G23 Migration Guide from RL78/G13 to RL78/G23

RL78/G13

RL78/G23

Register name

Remark

Flash memory CRC control register (CRC0CTL)

None

Flash memory CRC operation result register (PGCRCL)

None CRC input register (CRCIN)

CRC input register (CRCIN)

None

CRC data register (CRCD)

None

Code flash memory guard register (GFLASH0)

New addition

Data flash memory guard register (GFLASH1)

New addition

Flash security area guard register (GFLASH2)

New addition

RAM parity error control register (RPECTL)

None

Invalid memory access detection control register (IAWCTL)

None

Guard register of IAWCTL register (GIAWCTL)

New addition

Timer input select register 0 (TIS0)

None A/D test register (ADTES)

A/D test register (ADTES)

None

Analog input channel specification register (ADS)

None Port mode select register (PMS)

New addition

UART loopback select register (ULBS)

New addition

2.16 Safety Functions

Table 2.17 Registers Used by Safety Functions

－

Note : The register name is unchanged. : Additional contents : Changed contents

: Deleted contents －: There is no corresponding register.

Caution. For details of each register function, refer to the User's Manual: Hardware.

2.17 Regulator

There is no register that controls the regulator.

R01AN5378EJ0100 Rev.1.00 Page 20 of 24 Apr.13.21

RL78/G13, RL78/G23 Migration Guide from RL78/G13 to RL78/G23

RL78/G13

RL78/G23

Option byte area

Remark

000C0H-000C3H

Changed functions of option bytes.

User option bytes

User option bytes 000C0H／010C0H (Settings related to WDT.)

000C0H／040C0H (Settings related to WDT.)

000C1H／010C1H (Settings related to LVD.)

000C1H／040C1H (Settings related to LVD.)

000C2H／010C2H

HOCO.)

000C2H／040C2H

HOCO.)

On-chip debug option byte

RL78/G13

RL78/G23

Register name

Remark

BCD correction result register (BCDADJ)

None

2.18 Option Bytes

There is no register that controls the option bytes. The function of option bytes is set using the option byte area. Table 2.18 shows a comparison of RL78/G13 and RL78/G23 option byte areas.

Table 2.18 Option Byte Area

(Normal／Boot swap operation)

／010C0H-010C3H

000C0H-000C2H ／010C0H-010C2H

(Settings related to flash and

000C3H／010C3H

Note : The option bytes name is unchanged. : Additional contents : Changed contents

: Deleted contents －: There is no corresponding register.

Caution. For details of the function of each option bytes, refer to the User's Manual: Hardware.

(Normal／Boot swap operation)

／040C0H-040C3H

000C0H-000C2H ／040C0H-040C2H

(Settings related to flash and

000C3H／040C3H

Changed address when using the boot swap operation.

2.19 On-Chip Debugging

There is no register that controls the on-chip debugging function.

2.20 BCD Correction Circuit

Note : The register name is unchanged. : Additional contents : Changed contents

: Deleted contents －: There is no corresponding register.

Caution. For details of each register function, refer to the User's Manual: Hardware.

Table 2.19 Register Used by BCD Correction Circuit

R01AN5378EJ0100 Rev.1.00 Page 21 of 24 Apr.13.21

RL78/G13, RL78/G23 Migration Guide from RL78/G13 to RL78/G23

3. Other changes and notes

3.1 RL78/G23 instruction set

"Multiply and accumulation register (MACR)", which is used in the multiply and accumulation instructions, is added on RL78/G23. (The MACR register is composed of multiply and accumulation register (H)/(L): MACRH/MACRL).

R01AN5378EJ0100 Rev.1.00 Page 22 of 24 Apr.13.21

RL78/G13, RL78/G23 Migration Guide from RL78/G13 to RL78/G23

4. Documents for Reference

RL78/G13 User's Manual: Hardware (R01UH0146)

RL78/G23 User's Manual: Hardware (R01UH0896)

RL78 Family User's Manual: Software (R01US0015)

(The latest versions of the documents are available on the Renesas Electronics Website.)

Technical Updates/Technical Brochures

(The latest versions of the documents are available on the Renesas Electronics Website.)

R01AN5378EJ0100 Rev.1.00 Page 23 of 24 Apr.13.21

RL78/G13, RL78/G23 Migration Guide from RL78/G13 to RL78/G23

Rev.

Date

Description

Page

Summary

1.00

Apr.13.21

-

First edition issued

Revision History

R01AN5378EJ0100 Rev.1.00 Page 24 of 24 Apr.13.21

General Precautions in the Handling of Microprocessing Unit and Microcontroller Unit Products

The following usage notes are applicable to all Microprocessing unit and Microcontroller unit products from Renesas. For detailed usage notes on the products covered by this document, refer to the relevant sections of the document as well as any technical updates that have been issued for the products.

1. Precaution against Electrostatic Discharge (ESD)

A strong electrical field, when exposed to a CMOS device, can cause destruction of the gate oxide and ultimately degrade the device operation. Steps

must be taken to stop the generation of static electricity as much as possible, and quickly dissipate it when it occurs. Environmental control must be

adequate. When it is dry, a humidifier should be used. This is recommended to avoid using insulators that can easily build up static electricity.

Semiconductor devi ces must be stored and transported in an anti-static container, static shielding bag or conductive material. All test and

measurement tools including work benches and floors must be grounded. The operator must also be grounded using a wrist strap. Semiconductor

devices must not be touched with bare hands. Similar precautions must be taken for printed circuit boards with mounted semiconductor devices.

2. Processing at power-on

The state of the product is undefined at the time when power is supplied. The states of internal circuits in the LSI are indeterminate and the states of

register settings and pins are undefined at the time when power is supplied. In a finished product where the reset signal is applied to the external reset

pin, the states of pins are not guaranteed from the time when power is supplied until the reset process is completed. In a similar way, the states of pins

in a product that is reset by an on-chip power-on reset function are not guaranteed from the time when power is supplied until the power reaches the

level at which resetting is specified.

3. Input of signal during power-off state

Do not input signals or an I/O pull-up power supply while the device is powered off. The current injection that results from input of such a signal or I/O

pull-up power supply may cause malfunction and the abnormal current that passes in the device at this time may cause degradation of internal

elements. Follow the guideline for input signal during power-off state as described in your product documentation.

4. Handling of unused pins

Handle unused pins in accordance with the directions given under handling of unused pins in the manual. The input pins of CMOS products are

generally in the high-impedance state. In operation with an unused pi n in the open-circuit state, extra electromagnetic noise is induced in the vicinity of

the LSI, an associated shoot-through current flows internally, and malfunctions occur due to the false recognition of the pin state as an input signal

become possible.

5. Clock signals

After applying a reset, only release the reset line after the operating clock signal becomes stable. When switching the clock signal during program

execution, wait until the target clock signal is stabilized. When the clock signal is generated with an external resonator or from an external oscillator

during a reset, ensure that the reset line is only released after full stabilization of the clock signal. Additionally, when switching to a clock signal

produced with an external resonator or by an external oscillator while program execution is in progress, wait until the target clock signal is stable.

6. Voltage application waveform at input pin

Waveform distortion due to input noise or a reflected wave may cause malfunction. If the input of the CMOS device stays in the area between V

(Max.) and V

input level is fixed, and also in the transition period when the input level passes through the area between V

7. Prohibition of access to reserved addresses

Access to reserved addresses is prohibited. The reserved addresses are provided for possible future expansion of functions. Do not access these

addresses as the correct operation of the LSI is not guaranteed.

8. Differences between products

Before changing from one product to another, for example to a product with a different part number, confirm that the change will not lead to problems.

The characteristics of a microprocessing unit or microcontroller unit products in the same group but having a different part number might differ in terms

of internal memory capacity, layout pattern, and other factors, which can affect the ranges of electrical characteristics, such as characteristic values,

operating margins, immunity to noise, and amount of radiated noise. When changing to a product with a different part number, implement a system-

evaluation test for the given product.

(Min.) due to noise, for example, the device may malfunction. Take care to prevent chattering noise from entering the device when the

IH

(Max.) and VIH (Min.).

IL

Corporate Headquarters

Contact information

www.renesas.com

Trademarks

of their respective owners.

Notice

1. Descriptions of circuits, software and other related information in this document are provided only to illustrate the operation of semiconductor products

and application examples. You are fully responsible for the incorporation or any other use of the circuits, software, and information i n the design of your product or system. Renesas Electronics disclaims any and all liability for any losses and damages incurred by you or third parties arising from the use of these circuits, software, or information.

2. Renesas Electronics hereby expressly disclaims any warranties against and liability for infringement or any other claims involving patents, copyrights,

or other intellectual property rights of third parties, by or arising from the use of Renesas Electronics products or technical information described in this document, including but not limited to, the product data, drawings, charts, programs, algorithms, and application examples.

3. No license, express, implied or otherwise, is granted hereby under any patents, copyrights or other intellectual property rights of Renesas Electronics

or others.

4. You shall be responsible for determining what licenses are required from any third parties, and obtaining such licenses for the lawful import, export,

manufacture, sales, utilization, distribution or other disposal of any products incorporating Renesas Electronics products, if required.

5. You shall not alter, modify, copy, or reverse engineer any Renesas Electronics product, whether in whole or i n part. Renesas Electronics disclaims any

and all liability for any losses or damages incurred by you or third parties arising from such alteration, modification, copying or reverse engineering.

6. Renesas Electronics products are classified according to the following two quality grades: “Standard” and “High Quality”. The intended applications for

each Renesas Electronics product depends on the product’s quality grade, as indicated below. "Standard": Computers; office equipment; communications equipment; test and measurement equipment; audio and visual equipment; home

"High Quality": Transportation equipment (automobiles, trains, ships, etc.); traffic control (traffic lights); large-scale communication equipment; key

Unless expressly designated as a high reliability product or a product for harsh environments in a Renesas Electronics data sheet or other Renesas Electronics document, Renesas Electronics products are not intended or authorized for use in products or systems that may pose a direct threat to human life or bodily injury (artificial life support devices or systems; surgical implantations; etc.), or may cause serious property damage (space system; undersea repeaters; nuclear power control systems; aircraft control systems; key plant systems; military equipment; etc.). Renesas Electronics disclaims any and all liability for any damages or losses incurred by you or any third parties arising from the use of any Renesas Electronics product that is inconsistent with any Renesas Electronics data sheet, user’s manual or other Renesas Electronics document.

7. No semiconductor product is absolutely secure. Notwithstanding any security measures or features that may be implemented in Renesas Electronics

hardware or software products, Renesas Electronics shall have absolutely no liability arising out of any vulnerability or security breach, including but not limited to any unauthorized access to or use of a Renesas Electronics product or a system that uses a Renesas Electronics product. RENESAS ELECTRONICS DOES NOT WARRANT OR GUARANTEE THAT RENESAS ELECTRONICS PRODUCTS, OR ANY SYSTEMS CREATED USING RENESAS ELECTRONICS PRODUCTS WILL BE INVULNERABLE OR FREE FROM CORRUPTION, ATTACK, VIRUSES, INTERFERENCE, HACKING, DATA LOSS OR THEFT, OR OTHER SECURITY INTRUSION (“Vulnerability Issues”). RENESAS ELECTRONICS DISCLAIMS ANY AND ALL RESPONSIBILITY OR LIABILITY ARISING FROM OR RELATED TO ANY VULNERABILITY ISSUES. FURTHERMORE, TO THE EXTENT PERMITTED BY APPLICABLE LAW, RENESAS ELECTRONICS DISCLAIMS ANY AND ALL WARRANTIES, EXPRESS OR IMPLIED, WITH RESPECT TO THIS DOCUMENT AND ANY RELATED OR ACCOMPANYING SOFTWARE OR HARDWARE, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY, OR FITNESS FOR A PARTICULAR PURPOSE.

8. When using Renesas Electronics products, refer to the latest product information (data sheets, user’s manuals, application notes, “General Notes for

Handling and Using Semiconductor Devices” in the reliability handbook, etc.), and ensure that usage conditions are within the ranges specified by Renesas Electronics with respect to maximum ratings, operating power supply voltage range, heat dissipation characteristics, installation, etc. Renesas Electronics disclaims any and all liability for any malfunctions, failure or accident arising out of the use of Renesas Electronics products outside of such specified ranges.

9. Although Renesas Electronics endeavors to improve the quality and reliability of Renesas Electronics products, semiconductor products have specific

characteristics, such as the occurrence of failure at a certain rate and malfunctions under certain use conditions. Unless designated as a high reliability product or a product for harsh environments in a Renesas Electronics data sheet or other Renesas Electronics document, Renesas Electronics products are not subject to radiation resistance design. You are responsible for implementing safety measures to guard against the possibility of bodily injury, injury or damage caused by fire, and/or danger to the public in the event of a failure or malfunction of Renesas Electronics products, such as safety design for hardware and software, including but not limited to redundancy, fire control and malfunction prevention, appropriate treatment for aging degradation or any other appropriate measures. Because the evaluation of microcomputer software alone is very difficult and impractical, you are responsible for evaluating the safety of the final products or systems manufactured by you.

10. Please contact a Renesas Electronics sales office for details as to environmental matters such as the environmental compatibility of each Renesas

Electronics product. You are responsible for carefully and sufficiently investigating applicable laws and regulations that regulate the inclusion or use of controlled substances, including without limitation, the EU RoHS Directive, and using Renesas Electronics products in compliance with all these applicable laws and regulations. Renesas Electronics disclaims any and all liability for damages or losses occurring as a result of your noncompliance with applicable law s and regulations.

11. Renesas Electronics products and technologies shall not be used for or incorporated into any products or systems whose manufacture, use, or sale is

prohibited under any applicable domestic or foreign laws or regulations. You shall comply with any applicable export control laws and regulations promulgated and administered by the governments of any countries asserting jurisdi ction over the parties or transactions.

12. It is the responsibility of the buyer or distributor of Renesas Electronics products, or any other party who distributes, disposes of, or otherwise sells or

transfers the product to a third party, to notify such third party in advance of the contents and conditions set forth in this document.

13. This document shall not be reprinted, reproduced or duplicated in any form, in whole or in part, without prior written consent of Renesas Electronics.

14. Please contact a Renesas Electronics sales office if you have any questions regarding the information contained in this document or Renesas

Electronics products.

(Note1) “Renesas Electronics” as used i n this document means Renesas Electronics Corporation and also includes its directly or indirectly controlled

(Note2) “Renesas Electronics product(s)” means any product developed or manufactured by or for Renesas Electronics.

subsidiaries.

electronic appliances; machine tools; personal electronic equipment; industrial robots; etc.

financial terminal systems; safety control equipment; etc.

(Rev.5.0-1 October 2020)

TOYOSU FORESIA, 3-2-24 Toyosu,

Koto-ku, Tokyo 135-0061, Japan

Renesas and the Renesas logo are trademarks of Renesas Electronics

Corporation. All trademarks and registered trademarks are the property

For further information on a product, technology, the most up-to-date version of a document, or your nearest sales office, please visit:

www.renesas.com/contact/

.

Renesas RL78/G13, RL78/G23 User manual

Specifications and Main Features

Frequently Asked Questions

User Manual

1. Differences in peripheral functions between RL78/G13 and RL78/G23

2. Comparison of RL78/G13 and RL78/G23 registers

2.1 Port Functions

2.2 Clock Generator

2.3 Timer Array Unit

2.4 Realtime Clock

2.5 Clock Output/Buzzer Output Controller

2.6 Watchdog Timer

2.7 A/D Converter

2.8 Serial Array Unit

2.9 Serial Interface IICA

2.10 Interrupt Functions

2.11 Key Interrupt Function

2.12 Standby Function

2.13 Reset Function

2.14 Power-On-Reset Circuit

2.15 Voltage Detector

2.16 Safety Functions

2.17 Regulator

2.18 Option Bytes

2.19 On-Chip Debugging

2.20 BCD Correction Circuit

3. Other changes and notes

3.1 RL78/G23 instruction set

4. Documents for Reference

Revision History

General Precautions in the Handling of Microprocessing Unit and Microcontroller Unit Products

Notice