Philips PCD3755AH, PCD3755AP, PCD3755AT, PCD3755FP, PCD3755EH Datasheet

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INTEGRATED CIRCUITS

DATA SH EET

PCD3755A; PCD3755E; PCD3755F

8-bit microcontrollers with DTMF generator, 8 kbytes OTP and 128 bytes EEPROM

Product speciﬁcation Supersedes data of 1996 Dec 18 File under Integrated Circuits, IC03

1997 Apr 16

Philips Semiconductors Product speciﬁcation

8-bit microcontrollers with DTMF generator , 8 kbytes OTP and 128 bytes EEPROM

CONTENTS

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

5.1 Pinning

5.2 Pin description 6 FREQUENCY GENERATOR

6.1 Frequency generator derivative registers

6.2 Melody output (P1.7/MDY)

6.3 Frequency registers

6.4 DTMF frequencies

6.5 Modem frequencies

6.6 Musical scale frequencies 7 EEPROM AND TIMER 2 ORGANIZATION

7.1 EEPROM registers

7.2 EEPROM latches

7.3 EEPROM flags

7.4 EEPROM macros

7.5 EEPROM access

7.6 Timer 2 8 DERIVATIVE INTERRUPTS 9 TIMING 10 RESET 11 IDLE MODE 12 STOP MODE 13 INSTRUCTION SET RESTRICTIONS 14 OVERVIEW OF PORT AND

POWER-ON-RESET CONFIGURATION 15 OTP PROGRAMMING 16 SUMMARY OF DERIVATIVE REGISTERS 17 HANDLING 18 LIMITING VALUES 19 DC CHARACTERISTICS 20 AC CHARACTERISTICS 21 PACKAGE OUTLINES 22 SOLDERING

22.1 Reflow soldering

22.2 Wave soldering

22.3 DIP

22.4 Repairing soldered joints 23 DEFINITIONS 24 LIFE SUPPORT APPLICATIONS

PCD3755A; PCD3755E;

PCD3755F

1997 Apr 16 2

Philips Semiconductors Product speciﬁcation

8-bit microcontrollers with DTMF generator , 8 kbytes OTP and 128 bytes EEPROM

1 FEATURES

• 8-bit CPU, ROM, RAM, EEPROM and I/O; in a single

28-lead or 32-lead package

• 8 kbytes user-programmable ROM (One-Time

Programmable)

• 128 bytes RAM

• 128 bytes Electrically Erasable Programmable

Read-Only Memory (EEPROM)

• Over 100 instructions (based on MAB8048) all of 1 or 2

cycles

• 20 quasi-bidirectional I/O port lines

• 8-bit programmable Timer/event counter 1

• 8-bit reloadable Timer 2

• Three single-level vectored interrupts:

– external – 8-bit programmable Timer/event counter 1 – derivative; triggered by reloadable Timer 2

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

interrupt input

• DTMF, modem, musical tone generator

• Reference for supply and temperature-independent

tone output

• Filtering for low output distortion (CEPT compatible)

• Melody output for ringer application

• Power-on-reset

• Stop and Idle modes

• Supply voltage: 1.8 to 6 V (DTMF tone output and

EEPROM erase/write from 2.5 V)

• Clock frequency: 1 to 16 MHz (3.58 MHz for DTMF

suggested)

• Operating temperature: −25 to +70 °C

• Manufactured in silicon gate CMOS process.

PCD3755A; PCD3755E;

PCD3755F

2 GENERAL DESCRIPTION

This data sheet details the specific properties of the PCD3755A, PCD3755E and PCD3755F. The devices differ in their Port and Power-on-reset configurations. References to ‘PCD3755x’ apply to all three types. The devices are members of the PCD33xxA family of microcontrollers. The shared properties of the family are described in the

“PCD33xxA family”

conjunction with this publication. The PCD3755A, PCD3755E and PCD3755F are

One-Time Programmable (OTP) microcontrollers designed primarily for telephony applications.They include an on-chip generator for dual tone multifrequency (DTMF), modem and musical tones. In addition to dialling, generated frequencies can be made available as square waves (P1.7/MDY) for melody generation, providing ringer operation.

The PCD3755A, PCD3755E and PCD3755F also incorporate 128 bytes of EEPROM. The EEPROM can be used for storing telephone numbers, particularly for implementing redial functions.

The Power-on-reset circuitry is extra accurate to accommodate parallel telephones and fax equipment.

The instruction set is similar to that of the MAB8048 and is a sub-set of that listed in the sheet.

data sheet, which should be read in

“PCD33xxA family”

data

3 ORDERING INFORMATION (see note 1)

TYPE NUMBER

NAME DESCRIPTION VERSION

PCD3755xP DIP28 plastic dual in-line package; 28 leads (600 mil) SOT117-1 PCD3755xT SO28 plastic small outline package; 28 leads; body width 7.5 mm SOT136-1 PCD3755xH LQFP32 plastic low proﬁle quad ﬂat package; 32 leads; body 7 × 7 × 1.4 mm SOT358-1

Note

1. Please refer to the Order Entry Form (OEF) for this device for the full type number to use when ordering. This type

number will also specify the required program and the ROM mask options.

1997 Apr 16 3

PACKAGE

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1997 Apr 16 4

4 BLOCK DIAGRAM

8-bit microcontrollers with DTMF generator,

8 kbytes OTP and 128 bytes EEPROM

Philips Semiconductors Product speciﬁcation

TIMER 2 RELOAD

POWER-ON-RESET

RESET

PORT 2

FLIP-FLOP

TIMER 2

P2.0 to P2.3

4 7

PORT 2

BUFFER

EEPROM ADDRESS REGISTER

EEPROM

128 bytes

POR

EEPROM

CONTROL

GENERATOR

HGF

EEPROM

DATA

TRANSFER

TONE

FILTER

SINE WAVE

derivative

interrupt

LGF

INTERRUPT

LOGIC

MELODY CONTROL REGISTER

ACCUMULATOR

timer interrupt

external interrupt

P1.7/MDY

PORT 1

FLIP-FLOP

TEMPORARY

STOP

IDLE

INTERRUPT INITIALIZE

P1.0 to P1.6

PORT 1

BUFFER

CE/T0

INTERNAL

CLOCK

FREQ.

PCD3755x

TEMPORARY

CONTROL AND TIMING

OSCILLATOR

MEMORY

BANK

FLIP-FLOPS

TIMER/ EVENT

COUNTER

ARITHMETIC

LOGIC UNIT

DECIMAL

ADJUST

XTAL2XTAL1RESET

RESIDENT

OTP-ROM

8 kbytes

DECODE

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

MBG639

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

128 bytes

PCD3755A; PCD3755E;

Fig.1 Block diagram.

handbook, full pagewidth

PCD3755F

Philips Semiconductors Product speciﬁcation

8-bit microcontrollers with DTMF generator, 8 kbytes OTP and 128 bytes EEPROM

5 PINNING INFORMATION

5.1 Pinning

handbook, halfpage

XTAL1 XTAL2

RESET

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

CE/T0

1 2 3 4 5 6 7

PCD3755xP PCD3755xT

9 10 11 12

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

P0.0 P2.3 P2.2 P2.1

DD TONE V

SS P2.0

P1.7/MDY P1.6 P1.5 P1.4

PCD3755A; PCD3755E;

PCD3755F

handbook, full pagewidth

P1.0 P1.1

MBG640

P1.3

1514

P1.2

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

P2.2

P2.3

P0.0

n.c.

P0.1

P0.2

P0.3

P0.4 32

n.c.

1 2

P0.5 P0.6

3 4

P0.7

T1 XTAL1 XTAL2

RESET

5 6 7 8

PCD3755xH

24 23 22 21 20 19 18 17

P2.1 V

DD TONE V

SS P2.0

P1.7/MDY P1.6 n.c.

P1.0

P1.1

CE/T0

P1.2

Fig.3 Pin configuration (SOT358-1).

1997 Apr 16 5

13 n.c.

P1.3

P1.4

P1.5

MBG641

Philips Semiconductors Product speciﬁcation

8-bit microcontrollers with DTMF generator, 8 kbytes OTP and 128 bytes EEPROM

5.2 Pin description Table 1 SOT117-1 and SOT136-1 packages (for information on parallel I/O ports, see Chapter 14)

SYMBOL PIN TYPE DESCRIPTION

P1.1 to P0.7 1 to 7 I/O 7 bits of Port 0: 8-bit quasi-bidirectional I/O port T1 8 I Test 1 or count input of 8-bit Timer/event counter 1 XTAL1 9 I crystal oscillator or external clock input XTAL2 10 O crystal oscillator output RESET 11 I reset input CE/

T0 12 I Chip Enable or Test 0 P1.0 to P1.6 13 to 19 I/O 7 bits of Port 1: 8-bit quasi-bidirectional I/O port P1.7/MDY 20 I/O 1 bit of Port 1: 8-bit quasi-bidirectional I/O port; or melody output P2.0 21 I/O 1 bit of Port 2: 4-bit quasi-bidirectional I/O port V

TONE 23 O DTMF output V

P2.1 to P2.3 25 to 27 I/O 3 bits of Port 2: 4-bit quasi-bidirectional I/O port P0.0 28 I/O 1 bit of Port 0: 8-bit quasi-bidirectional I/O port

22 P ground

24 P positive supply voltage

PCD3755A; PCD3755E;

PCD3755F

Table 2 SOT358-1 package (for information on parallel I/O ports, see Chapter 14)

SYMBOL PIN TYPE DESCRIPTION

n.c. 1, 13, 17, 28 − not connected P0.5 to P0.7 2 to 4 I/O 3 bits of Port 0: 8-bit quasi-bidirectional I/O port T1 5 I Test 1 or count input of 8-bit Timer/event counter 1 XTAL1 6 I crystal oscillator or external clock input XTAL2 7 O crystal oscillator output RESET 8 I reset input CE/

T0 9 I Chip Enable or Test 0 P1.0 to P1.6 10 to 12,

14 to 16, 18 P1.7/MDY 19 I/O 1 bit of Port 1: 8-bit quasi-bidirectional I/O port; or melody output P2.0 20 I/O 1 bit of Port 2: 4-bit quasi-bidirectional I/O port V

TONE 22 O DTMF output V

P2.1 to P2.3 24 to 26 I/O 3 bits of Port 2: 4-bit quasi-bidirectional I/O port P0.0 to P0.4 27, 29 to 32 I/O 5 bits of Port 0: 8-bit quasi-bidirectional I/O port

21 P ground

23 P positive supply voltage

I/O 7 bits of Port 1: 8-bit quasi-bidirectional I/O port

1997 Apr 16 6

Philips Semiconductors Product speciﬁcation

8-bit microcontrollers with DTMF generator , 8 kbytes OTP and 128 bytes EEPROM

6 FREQUENCY GENERATOR

A versatile frequency generator section is provided (see Fig.4). For normal operation, use a 3.58 MHz quartz crystal or PXE resonator. The frequency generator includes precision circuitry for dual tone multifrequency (DTMF) signals, which is typically used for tone dialling telephone sets.

Their frequencies are provided in purely sinusoidal form on the TONE output or as square waves on the P1.7/MDY output.

6.1 Frequency generator derivative registers

6.1.1 H Table 3 gives the addresses, mnemonics and access types of the High Group Frequency (HGF) and Low Group

Frequency (LGF) registers.

Table 3 Hexadecimal addresses, mnemonics, access types and bit mnemonics of the frequency registers

ADDRESS

IGH AND LOW GROUP FREQUENCY REGISTERS

MNEMONIC

11H HGF W H7H6H5H4H3H2H1H0

12H LGF W L7L6L5L4L3L2L1L0

ACCESS

TYPE

7 6 5 4 3 2 1 0

The TONE output can alternatively issue twelve modem frequencies for data rates between 300 and 1200 bits/s.

In addition to DTMF and modem frequencies, two octaves of musical scale in steps of semitones are available.

In case no tones are generated the TONE output is in 3-state mode.

BIT MNEMONICS

PCD3755A; PCD3755E;

PCD3755F

6.1.2 M MDYCON is a R/W register.

Table 4 Melody Control Register (address 13H)

Table 5 Description of MDYCON bits

ELODY CONTROL REGISTER (MDYCON)

7 6 5 4 3 2 1 0

0000000EMO

BIT MNEMONIC DESCRIPTION

7to1 − These bits are set to a logic 0.

0 EMO Enable Melody Output. If bit EMO = 0, then P1.7/MDY is a standard port line.

If bit EMO = 1, then P1.7/MDY is the melody output. EMO = 1 does not inhibit the port instructions for P1.7/MDY. Therefore the state of both port line and ﬂip-ﬂop may be read in and the port ﬂip-ﬂop may be written by port instructions. However, the port ﬂip-ﬂop of P1.7/MDY must remain set to avoid conﬂicts between melody and port outputs. When the HGF contents are zero while EMO = 1, P1.7/MDY is in the logic HIGH state.

1997 Apr 16 7

Philips Semiconductors Product speciﬁcation

8-bit microcontrollers with DTMF generator , 8 kbytes OTP and 128 bytes EEPROM

handbook, full pagewidth

INTERNAL BUS

MELODY CONTROL

HGF REGISTER

LGF REGISTER

square wave

DIGITAL

SINE WAVE

SYNTHESIZER

SWITCHED

CAPACITOR

BANDGAP VOLTAGE

REFERENCE

DIGITAL

SINE WAVE

SYNTHESIZER

DAC

PCD3755A; PCD3755E;

SWITCHED

CAPACITOR

LOW-PASS

FILTER

PCD3755F

PORT/MELODY

OUTPUT LOGIC

RC LOW-PASS

FILTER

MLC416

P1.7/ MDY

TONE

Fig.4 Block diagram of the frequency generator and melody output (P1.7/MDY) section.

1997 Apr 16 8

Philips Semiconductors Product speciﬁcation

8-bit microcontrollers with DTMF generator, 8 kbytes OTP and 128 bytes EEPROM

6.2 Melody output (P1.7/MDY)

The melody output (P1.7/MDY) is very useful for generating musical tones when a purely sinusoidal signal is not required, such as for ringer applications.

The square wave (duty cycle =12⁄23 or 52%) will include the attenuated harmonics of the base frequency, which is defined by the contents of the HGF register (Table 3). However, even higher frequency tones may be produced since the low-pass filtering on the TONE output is not applied to the P1.7/MDY output. This results in the minimum decimal value x in the HGF register being 2 for the P1.7/MDY output, rather than 60 for the TONE output

- the value shown in equation (1). A sinusoidal TONE output is produced at the same time as the melody square wave, but due to the filtering, the higher frequency sine waves with x < 60 will not appear at the TONE output.

Since the melody output is shared with P1.7, the port flip-flop of P1.7 has to be set HIGH before using the melody output. This is to avoid conflicts between melody and port outputs. The melody output drive depends on the configuration of port P1.7/MDY; see Chapter 14, Table 24.

6.3 Frequency registers

PCD3755A; PCD3755E;

PCD3755F

The amplitude of the Low group frequency sine wave is attenuated by 2 dB compared to the amplitude of the High group frequency sine wave. The two sine waves are summed and then filtered by an on-chip switched capacitor and RC low-pass filters. These guarantee that all DTMF tones generated fulfil the CEPT recommendations with respect to amplitude, frequency deviation, total harmonic distortion and suppression of unwanted frequency components.

The value 00H in a frequency register stops the corresponding digital sine synthesizer. If both frequency registers contain 00H, the whole frequency generator is shut off, resulting in lower power consumption.

The frequency of the sine wave generated ‘f’ is dependent on the clock frequency ‘f in the frequency registers (HGF and LGF). The variables are related by the equation:

= where 60 x 255≤≤

The frequency limitation given by x ≥ 60 is due to the low-pass filters which would attenuate higher frequency sine waves.

xtal

--------------------------------23 x 2+()[]

’ and the decimal value ‘x’ held

xtal

(1)

The two frequency registers HGF and LGF define two frequencies. From these, the digital sine synthesizers together with the Digital-to-Analog Converters (DACs) construct two sine waves. Their amplitudes are precisely scaled according to the bandgap voltage reference. This ensures tone output levels independent of supply voltage and temperature.

1997 Apr 16 9

Philips Semiconductors Product speciﬁcation

8-bit microcontrollers with DTMF generator, 8 kbytes OTP and 128 bytes EEPROM

6.4 DTMF frequencies

Assuming an oscillator frequency f DTMF standard frequencies can be implemented as shown in Table 6.

The relationships between telephone keyboard symbols, DTMF frequency pairs and the frequency register contents are given in Table 7.

Table 6 DTMF standard frequencies and their

implementation; value = LGF, HGF contents

VALUE

(HEX)

FREQUENCY (Hz) DEVIATION

STANDARD GENERATED (%) (Hz)

DD 697 697.90 0.13 0.90

C8 770 770.46 0.06 0.46 B5 852 850.45 −0.18 −1.55 A3 941 943.23 0.24 2.23 7F 1209 1206.45 −0.21 −2.55

72 1336 1341.66 0.42 5.66 67 1477 1482.21 0.35 5.21

5D 1633 1638.24 0.32 5.24

Table 7 Dialling symbols, corresponding DTMF

frequency pairs and frequency register contents

TELEPHONE

KEYBOARD

SYMBOLS

DTMF FREQ.

PAIRS

(Hz)

0 (941, 1336) A3 72 1 (697, 1209) DD 7F 2 (697, 1336) DD 72 3 (697, 1477) DD 67 4 (770, 1209) C8 7F 5 (770, 1336) C8 72 6 (770, 1477) C8 67 7 (852, 1209) B5 7F 8 (852, 1336) B5 72 9 (852, 1477) B5 67 A (697, 1633) DD 5D

B (770, 1633) C8 5D C (852, 1633) B5 5D D (941, 1633) A3 5D

• (941, 1209) A3 7F

# (941, 1477) A3 67

= 3.58 MHz, the

xtal

LGF

VALUE

(HEX)

HGF

VALUE

(HEX)

PCD3755A; PCD3755E;

PCD3755F

6.5 Modem frequencies

Again assuming an oscillator frequency f the standard modem frequencies can be implemented as in Table 8. It is suggested to define the frequency by the HGF register while the LGF register contains 00H, disabling Low Group Frequency generation.

Table 8 Standard modem frequencies and their

implementation

HGF

FREQUENCY (Hz) DEVIATION

VALUE

(HEX)

9D 980

82 1180

8F 1070

79 1270 80 1200 45 2200 76 1300 48 2100

5C 1650

52 1850

4B 2025

44 2225

MODEM GENERATED (%) (Hz)

(1)

(1) (2) (2) (3) (3) (4) (4) (1) (1) (2) (2)

978.82 −0.12 −1.18

1179.03 −0.08 −0.97

1073.33 0.31 3.33

1265.30 −0.37 −4.70

1197.17 −0.24 −2.83

2192.01 −0.36 −7.99

1296.94 −0.24 −3.06

2103.14 0.15 3.14

1655.66 0.34 5.66

1852.77 0.15 2.77

2021.20 −0.19 −3.80

2223.32 −0.08 −1.68

Notes

1. Standard is V.21.

2. Standard is Bell 103.

3. Standard is Bell 202.

4. Standard is V.23.

= 3.58 MHz,

xtal

1997 Apr 16 10

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