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.

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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

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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.

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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.

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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.

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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.

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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.

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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.

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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