Philips pcd3745a DATASHEETS

INTEGRATED CIRCUITS

DATA SH EET

PCD3745A

8-bit microcontroller with 4.5 kbytes OTP memory and 32 kHz real-time clock

Product speciﬁcation Supersedes data of 1997 Mar 04 File under Integrated Circuits, IC14

1999 Feb 02

Philips Semiconductors Product speciﬁcation

8-bit microcontroller with 4.5 kbytes OTP memory and 32 kHz real-time clock

1 FEATURES 2 GENERAL DESCRIPTION 3 ORDERING INFORMATION 4 BLOCK DIAGRAM 5 PINNING INFORMATION

5.1 Pinning

5.2 Pin description 6 REAL-TIME CLOCK (RTC)

6.1 Oscillator

6.2 Divider chain

6.3 Frequency adjustment

6.4 Clock Control Register (CLCR)

6.5 Frequency Adjustment Register (FAR) 7 PERIPHERAL COUNTER 1 AND

COUNTER 2

7.1 Peripheral Counter Control Register (PCCR) 8 THE RTC, COUNTER 1 AND COUNTER 2

INTERRUPTS

9 REDUCED POWER MODES

9.1 Idle mode

9.2 Stop mode 10 INSTRUCTION SET RESTRICTIONS 11 TIMING 12 RESET 13 SUMMARY OF CONFIGURATIONS 14 OTP PROGRAMMING 15 SUMMARY OF DERIVATIVE REGISTERS 16 LIMITING VALUES 17 HANDLING 18 DC CHARACTERISTICS 19 AC CHARACTERISTICS 20 PACKAGE OUTLINES 21 SOLDERING

21.1 Introduction

21.2 Through-hole mount packages

21.3 Surface mount packages

21.4 Suitability of IC packages for wave, reflow and dipping soldering methods

22 DEFINITIONS 23 LIFE SUPPORT APPLICATIONS

PCD3745A

1999 Feb 02 2

Philips Semiconductors Product speciﬁcation

8-bit microcontroller with 4.5 kbytes OTP memory and 32 kHz real-time clock

1 FEATURES

• 8-bit CPU, RAM and I/O

• 4.5 kbytes OTP memory; 224 bytes RAM

• 32 kHz adjustable crystal oscillator for real-time clock

• Over 100 instructions (based on MAB8048) all of

1 or 2 cycles

• 16 quasi-bidirectional I/O port lines

• 8-bit programmable Timer/event counter 1

• Two 16-bit counters with count inputs pins

• 2 single-level vectored interrupts:

– external; peripheral Counters 1 and 2; RTC alarm – 8-bit programmable Timer/event counter 1

• Two test inputs, one of which also serves as the external

interrupt input

• Stop and Idle modes for power saving

• Logic supply: 1.8 to 6 V

• CPU clock frequency: 1 to 16 MHz

• Operating temperature: −25 to +70 °C

• Manufactured in silicon gate CMOS process.

PCD3745A

2 GENERAL DESCRIPTION

The PCD3745A is a microcontroller oriented towards communication and metering applications. It has

4.5 kbytes of One Time Programmable (OTP) memory, 224 bytes RAM and 16 I/O lines.

The PCD3745A also incorporates a low power Real-Time Clock (RTC) and two low power 16-bit counters. The RTC runs using a 32 kHz crystal oscillator and is register adjustable. The RTC and the counters are able to operate in all microcontroller modes. The instruction set is based on that of the MAB8048 and is software compatible with the PCD33xxA family.

This data sheet details the specific properties of the PCD3745A. The shared characteristics of the PCD33xxA family of microcontrollers are described in the

Handbook IC14; Section PCD33xxA Family”

be read in conjunction with this publication.

“Data

, which should

3 ORDERING INFORMATION

TYPE NUMBER

NAME DESCRIPTION VERSION

PCD3745AP DIP28 plastic dual in-line package; 28 leads (600 mil) SOT117-1 PCD3745AT SO28 plastic small outline package; 28 leads; body width 7.5 mm SOT136-1 PCD3745AH LQFP32 plastic low proﬁle quad ﬂat package; 32 leads; body 7 × 7 × 1.4 mm SOT358-1

PACKAGE

1999 Feb 02 3

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1999 Feb 02 4

4 BLOCK DIAGRAM

8-bit microcontroller with 4.5 kbytes OTP

memory and 32 kHz real-time clock

Philips Semiconductors Product speciﬁcation

P1.0 to P1.6

P1.7/RCO

PORT 1

BUFFER

PORT 1

FLIP-FLOP

INTERNAL

CLOCK

FREQ.

PCD3745A

TEMPORARY

RTC1 RTC2

RTC

88888

C2LBC1HBC1LBPCCR

CLK2CLK1

C2HB

INTERRUPT

LOGIC

ACCUMULATOR

timer interrupt

external interrupt

STOP

IDLE

TEMPORARY

CONTROL AND TIMING

CE/T0

INTERRUPT INITIALIZE

FLIP-FLOPS

ARITHMETIC

LOGIC UNIT

DECIMAL

ADJUST

XTAL2XTAL1RESET

OSCILLATOR

MEMORY

TIMER/

EVENT

COUNTER

RESIDENT

OTP-ROM

4.5 kbytes

DECODE

BANK

HIGHER PROGRAM COUNTER

88 8

INSTRUCTION

LOWER PROGRAM COUNTER

5 888 8

AND

CONDITIONAL

BRANCH

LOGIC

PROGRAM

STATUS

WORD

RAM ADDRESS REGISTER

T 1 CE/T0

TIMER

FLAG

CARRY ACC

ACC BIT

TEST

MBH909

P0.0 to P0.7

PORT 0

BUFFER

PORT 0

FLIP-FLOP

MULTIPLEXER

8 LEVEL STACK

(VARIABLE LENGTH)

OPTIONAL SECOND

DATA STORE

RESIDENT RAM ARRAY

224 bytes

PCD3745A

Fig.1 Block diagram.

handbook, full pagewidth

Philips Semiconductors Product speciﬁcation

8-bit microcontroller with 4.5 kbytes OTP memory and 32 kHz real-time clock

5 PINNING INFORMATION

5.1 Pinning

handbook, halfpage

P0.1 P0.2 P0.3 P0.4 P0.5 P0.6 P0.7

T1 XTAL1 XTAL2

RESET

CE/T0

P1.0 P1.1

1 2 3 4 5 6 7

PCD3745A

9 10 11 12 13

MBH910

28 27 26 25 24 23 22 21 20 19 18 17 16 1514

P0.0 CLK2 CLK1 EMUN

DD RTC2 V

SS RTC1

P1.7/RCO P1.6 P1.5 P1.4 P1.3 P1.2

PCD3745A

handbook, full pagewidth

Fig.2 Pin configuration (SOT117-1 and SOT136-1).

CLK1

CLK2

P0.0

n.c.

P0.1

P0.2

P0.3

P0.4

n.c. P0.5 P0.6 P0.7

T1 XTAL1 XTAL2

RESET

1 2 3 4 5 6 7 8

CE/T0

P1.0

PCD3745A

P1.1

P1.2

13 n.c.

P1.3

P1.4

P1.5

EMUN

RTC2

21 20

RTC1 P1.7/RCO

P1.6

18 17

n.c.

MBH911

Fig.3 Pin configuration (SOT358-1).

1999 Feb 02 5

Philips Semiconductors Product speciﬁcation

8-bit microcontroller with 4.5 kbytes OTP

PCD3745A

memory and 32 kHz real-time clock

5.2 Pin description Table 1 SOT117-1 and SOT136-1 packages

SYMBOL PIN DESCRIPTION

P0.0 to P0.7 28, 1 to 7 Port 0: 8 quasi-bidirectional I/O lines T1 8 Test 1 or count input of 8-bit Timer/event counter 1 XTAL1 9 crystal oscillator or external clock input XTAL2 10 crystal oscillator output RESET 11 reset input CE/

T0 12 chip enable or Test 0 P1.0 to P1.6 13 to 19 Port 1: 7 quasi-bidirectional I/O lines P1.7/RCO 20 Port 1: 1 quasi-bidirectional I/O line/Real Clock Output 16 kHz RTC1 21 RTC 32 kHz oscillator input V

RTC2 23 RTC 32 kHz oscillator output V

EMUN 25 emulation pin, must be connected to V CLK1 26 count input of 16-bit peripheral Counter 1 CLK2 27 count input of 16-bit peripheral Counter 2

22 ground

24 positive supply voltage

for normal mode operation.

Table 2 SOT358-1 package

SYMBOL PIN DESCRIPTION

n.c. 1, 13, 17, 28 not connected T1 5 Test 1 or count input of 8-bit Timer/event counter 1 XTAL1 6 crystal oscillator or external clock input XTAL2 7 crystal oscillator output RESET 8 reset input CE/

T0 9 chip enable or Test 0 P1.0 to P1.6 10 to 12,

Port 1: 7 quasi-bidirectional I/O lines

14 to 16, 18 P1.7/RCO 19 Port 1: 1 quasi-bidirectional I/O line/Real Clock Output 16 kHz RTC1 20 RTC 32 kHz oscillator input V

21 ground RTC2 22 RTC 32 kHz oscillator output V

EMUN 24 emulation pin, must be connected to V

23 positive supply voltage

for normal mode operation.

CLK1 25 count input of 16-bit peripheral Counter 1 CLK2 26 count input of 16-bit peripheral Counter 2 P0.0 to P0.7 27, 29 to 32,

Port 0: 8 quasi-bidirectional I/O lines

2to4

1999 Feb 02 6

Philips Semiconductors Product speciﬁcation

8-bit microcontroller with 4.5 kbytes OTP memory and 32 kHz real-time clock

6 REAL-TIME CLOCK (RTC)

The RTC consists of a 32 kHz crystal oscillator, a 32 kHz to 1 second, 1.5 second and 1 minute divider chain, an 8-bit Frequency Adjustment Register (FAR) and the Clock Control Register (CLCR). The complete real-time clock section is independent of the microcontroller status, even in Idle or Stop mode.

6.1 Oscillator

The internal 32 kHz oscillator requires an external

32.768 kHz quartz crystal (a positive deviation up to +259 ppm is allowed by using frequency adjustment) and an external feedback resistor (4.7 MΩ) connected between the RTC1 and RTC2 pins. The oscillator is controlled by the RUN bit in the Clock Control Register.

6.2 Divider chain

The divider chain operates with the 32 kHz oscillator output and divides this signal down to produce three different clocks with periods of 1 second, 1.5 second and 1 minute. Depending on the state of the ITS and SITS bits in the Clock Control Register, the falling edge of the 1 second, 1.5 second or 1 minute clock is used to set the Clock Interrupt Flag (CIF) in the Clock Control Register. Since the clock interrupt is used to let the microcontroller leave the Stop mode, it is wire ORed with the external interrupt (CE/ must be enabled in the Clock Control Register (ECI = 1) and by execution of EN I. The clock interrupt will then be treated as an external interrupt

T0) and has the same functionality, e.g. it

PCD3745A

6.3 Frequency adjustment

Frequency adjustment is used to extend the interrupt time by defining the number of 16 kHz clocks in the Frequency Adjustment Register that will be counted twice within the first 1 second or 1.5 second period after a minute interrupt. The DIV512 is reset if its contents is equal to FAR, this will extend the time of the next interrupt. This is done within the first 1 second or 1.5 seconds of every minute. If the second interrupt is used (ITS = 1 and SITS = 0), every 60th interval may be up to 15.3 ms longer than the others as a result of the frequency adjustment. If the 1.5 second interrupt is used (ITS = 1 and SITS = 1), the prolongation will affect every 40th interval. The adjusted Minute Interrupt Time (MIT) shows now a maximum deviation of

0.5 ppm. The frequency adjustment value of the real-time clock

section is defined by the decimal value of the contents of the 8-bit Frequency Adjustment Register. It can be read or written. The significance of the individual bits is illustrated by the following equation:

---------------- -

Minute Interrupt Time (MIT) 60 2

Table 7 shows the recommended correction factor FAR for all allowed real-time clock frequencies (FRCO).

The value of CLCR and FAR at reset is 00H.

FRCO

+×=

FAR

----------- -

Additionally, the divider chain generates a 16 kHz clock (RCO) that can be routed through port line P1.7/RCO, controlled by the ERCO bit in the Clock Control Register.

1999 Feb 02 7

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1999 Feb 02 8

Philips Semiconductors Product speciﬁcation

8-bit microcontroller with 4.5 kbytes OTP

memory and 32 kHz real-time clock

RUN

RTC2RTC2

32 kHz

COMPARE LOGIC

DIV512DIV2

internal bus

compare bit

FAR

DIV32/DIV48

DIV60 60 s

P1.7/RCO

1.5 s

1.0 s

RTCI

ERCOTST1TST2SITS RUN ITS CIF ECI CLCR

INTERRUPT

SELECT

MBH919

PCD3745A

Fig.4 RTC block diagram.

handbook, full pagewidth

Philips Semiconductors Product speciﬁcation

8-bit microcontroller with 4.5 kbytes OTP

PCD3745A

memory and 32 kHz real-time clock

6.4 Clock Control Register (CLCR) Table 3 Clock Control Register (address 20H)

76543210

SITS TST2 TST1 ERCO RUN ITS CIF ECI

Table 4 Description of CLCR bits

BIT SYMBOL DESCRIPTION

7 SITS Second Interrupt Time Select. If SITS = 1 and ITS = 1, then the interrupt time is

1.5 seconds. 6 TST2 Test 2 input. This is a test bit and must be ﬁxed at zero by user software. 5 TST1 Test 1 input. This is a test bit and must be ﬁxed at zero by user software. 4 ERCO Enable 16 kHz Clock Output. If ERCO = 0, then P1.7/RCO is a port line. If ERCO = 1,

then P1.7/RCO is a 16 kHz clock output. The port instructions for P1.7/RCO are not inhibited and therefore the state of both the port line and flip-flop may be read in and the port flip-flop may be written to by port instructions.

3 RUN Clock Run/Stop. If RUN = 0, then the 32 kHz oscillator is stopped and the divider chain

is reset. If RUN = 1, then the 32 kHz oscillator and the divider chain are running.

2 ITS Interrupt Time Select.If ITS = 1 and SITS = 0, then the interrupt time is one second. If

ITS = 0 and SITS = X, then the interrupt time is one minute.

1 CIF Clock Interrupt Flag. Set by hardware, if RTC divider chain overﬂows (every second,

1.5 second or minute depending on ITS) or by software. Reset: by software. 0 ECI Enable Clock Interrupt. If ECI = 0, the RTC interrupt is disabled. If ECI = 1, the RTC

interrupt is enabled.

6.5 Frequency Adjustment Register (FAR) Table 5 Frequency Adjustment Register (address 21H)

76543210

FAR7 FAR6 FAR5 FAR4 FAR3 FAR2 FAR1 FAR0

Table 6 Description of FAR bits

BIT SYMBOL DESCRIPTION

7 FAR7 The state of these 8-bits determine the frequency adjustment value for the real-time 6 FAR6 5 FAR5 4 FAR4 3 FAR3 2 FAR2 1 FAR1 0 FAR0

clock section; see Table 7.

1999 Feb 02 9

Philips Semiconductors Product speciﬁcation

8-bit microcontroller with 4.5 kbytes OTP memory and 32 kHz real-time clock

Table 7 Selection of FRCO

FAR (HEX) FRCO

00 16384.000 01 16384.018 02 16384.033 03 16384.051 04 16384.066 05 16384.084 06 16384.100 07 16384.117 08 16384.135 09 16384.150 0A 16384.168

0B 16384.184 0C 16384.201 0D 16384.217 0E 16384.234 0F 16384.250

10 16384.268

11 16384.283

12 16384.301

13 16384.316

14 16384.334

15 16384.350

16 16384.367

17 16384.385

18 16384.400

19 16384.418 1A 16384.434 1B 16384.451 1C 16384.467 1D 16384.484 1E 16384.500 1F 16384.518

20 16384.533

21 16384.551

PCD3745A

FAR (HEX) FRCO

22 16384.566 23 16384.584 24 16384.600 25 16384.617 26 16384.635 27 16384.650 28 16384.668 29 16384.684 2A 16384.701

2B 16384.717 2C 16384.734 2D 16384.750 2E 16384.768 2F 16384.783

30 16384.801

31 16384.816

32 16384.834

33 16384.850

34 16384.867

35 16384.885

36 16384.900

37 16384.918

38 16384.934

39 16384.951 3A 16384.967 3B 16384.984 3C 16385.000 3D 16385.018 3E 16385.033 3F 16385.051

40 16385.066

41 16385.084

42 16385.100

43 16385.117

1999 Feb 02 10

+ 22 hidden pages

Philips pcd3745a DATASHEETS

CONTENTS

1 FEATURES

2 GENERAL DESCRIPTION

3 ORDERING INFORMATION

4 BLOCK DIAGRAM

5 PINNING INFORMATION

5.1 Pinning

5.2 Pin description Table 1 SOT117-1 and SOT136-1 packages

6 REAL-TIME CLOCK (RTC)

6.1 Oscillator

6.2 Divider chain

6.3 Frequency adjustment

6.4 Clock Control Register (CLCR) Table 3 Clock Control Register (address 20H)

6.5 Frequency Adjustment Register (FAR) Table 5 Frequency Adjustment Register (address 21H)