Philips PCA3354CH, PCD3354AH Datasheet

INTEGRATED CIRCUITS

PCA3354C; PCD3354A

8-bit microcontrollers with DTMF generator and 256 bytes EEPROM

Product specification

1996 Dec 18

Supersedes data of 1996 May 09

File under Integrated Circuits, IC03

Philips Semiconductors	Product specification

8-bit microcontrollers with DTMF

PCA3354C; PCD3354A

generator and 256 bytes EEPROM

CONTENTS

1FEATURES

2GENERAL DESCRIPTION

3ORDERING INFORMATION

4BLOCK DIAGRAM

5PINNING INFORMATION

5.1Pinning

5.2Pin description

6	FREQUENCY GENERATOR

6.1Frequency generator derivative registers

6.2Melody output (P1.7/MDY)

6.3DTMF clock divider and output (DP1.7/DCO)

6.4Frequency registers

6.5DTMF frequencies

6.6Modem frequencies

6.7Musical scale frequencies

7	EEPROM AND TIMER 2 ORGANIZATION

7.1EEPROM registers

7.2EEPROM latches

7.3EEPROM flags

7.4EEPROM macros

7.5EEPROM access

7.6Timer 2

8DERIVATIVE INTERRUPTS

9TIMING

10RESET

11IDLE MODE

12STOP MODE

13SUMMARY OF I/O PORTS AND MASK OPTIONS

14SUMMARY OF DERIVATIVE REGISTERS

15HANDLING

16LIMITING VALUES

17DC CHARACTERISTICS

18AC CHARACTERISTICS

19PACKAGE OUTLINES

20SOLDERING

20.1Introduction

20.2Reflow soldering

20.3Wave soldering

20.4Repairing soldered joints

21DEFINITIONS

22LIFE SUPPORT APPLICATIONS

1996 Dec 18

2

Philips Semiconductors	Product specification

8-bit microcontrollers with DTMF

PCA3354C; PCD3354A

generator and 256 bytes EEPROM

1 FEATURES

∙8-bit CPU, ROM, RAM, EEPROM and I/O; all in a 44-lead quad flat package

∙8 kbytes ROM; 256 bytes RAM

∙256 bytes Electrically Erasable Programmable Read Only Memory (EEPROM)

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

∙36 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

∙Programmable DTMF clock divider

∙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)

∙CPU clock frequency: 1 to 16 MHz (3.58 MHz or 10.74 MHz for DTMF)

∙Operating ambient temperature:

– −25 to +70 °C (PCD3354A)

– 0 to 50 °C (PCA3354C)

∙Manufactured in silicon gate CMOS process.

3 ORDERING INFORMATION (see note 1)

2 GENERAL DESCRIPTION

This data sheet details the specific properties of the PCA3354C and PCD3354A. The shared properties of the PCD33xxA family of microcontrollers are described in the “PCD33xxA family” data sheet, which should be read in conjunction with this publication.

The PCA3354C and PCD3354A are microcontrollers oriented towards telephony applications. They include 8 kbytes ROM, 256 bytes RAM, 36 I/O lines, and an on-chip generator for dual tone multifrequency (DTMF), modem and musical tones. In addition to dialling, the

generated frequencies can be made available as square waves for melody generation, providing ringer operation.

The PCA3354C and PCD3354A also incorporate

256 bytes of EEPROM, permitting data storage without battery backup. The EEPROM can be used for storing telephone numbers, particularly for implementing redial functions.

The differences between PCA3354C and PCD3354A are shown in Table 1.

The instruction set is similar to the MAB8048 and is a sub-set of that listed in the “PCD33xxA family” data sheet.

Table 1 Differences: PCA3354C and PCD3354A

	TYPE	VPOR	AMBIENT
			TEMP. RANGE
	PCA3354C	fixed at 2.0 V ±0.3 V	0 to 50 °C
	PCD3354A	(1.2 to 3.6 V) ±0.5 V(1)	−25 to +70 °C

Note

1. See Chapter 13, Table 24.

	TYPE NUMBER		PACKAGE
		NAME	DESCRIPTION	VERSION
	PCA3354CH	QFP44	plastic quad flat package; 44 leads (lead length 2.35 mm);	SOT205-1
			body 14 × 14 × 2.2 mm
	PCD3354AH
	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.

1996 Dec 18

3

18 Dec 1996

4

P2.0 to P2.3

TONE

DP1.0 to DP1.7/DCO

P1.0 to P1.7/MDY

P0.0 to P0.7

DP0.0 to DP0.7

4

8

8

8

8

fDTMF

RESIDENT

PORT 2

DER. PORT 1

PORT 1

PCA3354C

ROM

PORT 0

DER. PORT 0

BUFFER

FILTER

BUFFER

BUFFER

8 kbytes

BUFFER

BUFFER

PORT 2

DER. PORT 1

PORT 1

PCD3354A

PORT 0

DER. PORT 0

FLIP-FLOP

FLIP-FLOP

FLIP-FLOP

INTERNAL

DECODE

FLIP-FLOP

FLIP-FLOP

SINE WAVE

CLOCK

MEMORY

BANK

GENERATOR

FREQ.

30

FLIP-FLOPS

DTMF-CLOCK

32

TIMER/

HIGHER

LOWER

PROGRAM

HGF

LGF

& MELODY

EVENT

PROGRAM

PROGRAM

STATUS

CONTROL

REGISTER

REGISTER

T1

COUNTER

COUNTER

COUNTER

WORD

REGISTER

4

8

8

8

8

8

8

8

8

8

8

5

8

8

8

8

8

8

8

8

8

8

8

8

8

8

TIMER 2

TIMER 2

EEPROM

EEPROM

EEPROM

INTERRUPT

TEMPORARY

MULTIPLEXER

RELOAD

REGISTER

CONTROL

ADDRESS

DATA

LOGIC

ACCUMULATOR

REGISTER 1

REGISTER 0

REGISTER

REGISTER

REGISTER

TRANSFER

timer interrupt

RAM

REGISTER 1

ADDRESS

REGISTER 2

derivative

REGISTER

REGISTER 3

interrupt

ARITHMETIC

INSTRUCTION

REGISTER 4

REGISTER

REGISTER 5

TEMPORARY

AND

D

REGISTER 6

REGISTER 2

DECODER

E

REGISTER 7

C

O

8 LEVEL STACK

EEPROM

LOGIC UNIT

D

(VARIABLE LENGTH)

VPOR

256 bytes

T1

E

OPTIONAL SECOND

POWER-ON-RESET

REGISTER BANK

DECIMAL

CONDITIONAL

CE/T0

external interrupt

TIMER

ADJUST

DATA STORE

RESET

BRANCH

FLAG

STOP

LOGIC

CARRY

CONTROL AND TIMING

ACC

RESIDENT RAM ARRAY

IDLE

ACC BIT

256 bytes

CE/T0

RESET

XTAL1

XTAL2

TEST

MED265

INTERRUPT

INITIALIZE

OSCILLATOR

handbook,full pagewidth

Fig.1 Block diagram.

DIAGRAM BLOCK 4

bytes 256 and generator	with microcontrollers bit-8
EEPROM	DTMF

PCD3354A PCA3354C;

Semiconductors Philips

specification Product

Philips Semiconductors	Product specification

8-bit microcontrollers with DTMF

PCA3354C; PCD3354A

generator and 256 bytes EEPROM

5 PINNING INFORMATION

5.1Pinning

			P2.0		P1.7/MDY		P1.6		P1.5		P1.4		P1.3		V		TONE		V		P1.2		P1.1
															DD				SS
			44		43		42		41		40		39		38		37		36		35		34
P2.1	1																								33	P1.0
P2.2	2																								32	P0.7
P2.3	3																								31	P0.6
DP0.0	4																								30	P0.5
DP0.1	5																								29	P0.4
										PCA3354CH
DP0.2	6																								28	XTAL2
DP0.3										PCD3354AH																XTAL1
	7																								27
DP0.4																										P0.3
	8																								26
DP0.5																										P0.2
	9																								25
DP0.6	10																								24	P0.1
DP0.7																										P0.0
	11																								23

	12			13		14		15		16		17		18		19		20		21		22
		CE/T0		T1		RESET		DP1.0		DP1.1		DP1.2		DP1.3		DP1.4		DP1.5		DP1.6		DP1.7/DCO

MED266

Fig.2 Pin configuration.

1996 Dec 18

5

Philips Semiconductors	Product specification

8-bit microcontrollers with DTMF

PCA3354C; PCD3354A

generator and 256 bytes EEPROM

5.2Pin description

Table 2 SOT205-1 package (for information on parallel I/O ports, see Chapter 13)

SYMBOL			PIN		TYPE	DESCRIPTION
P2.1 to P2.3			1 to	3	I/O	3 bits of Port 2: 4-bit quasi-bidirectional I/O port
DP0.0 to DP0.7			4 to 11		I/O	Derivative Port 0: 8-bit quasi-bidirectional I/O port
			12		I	Chip Enable or Test 0 input
CE/T0
T1			13		I	Test 1/count input of 8-bit Timer/event counter 1
RESET			14		I	reset input
DP1.0 to DP1.6			15 to	21	I/O	7 bits of Derivative Port 1: 8-bit quasi-bidirectional I/O port
DP1.7/DCO			22		I/O	1 bit of Derivative Port 1: 8-bit quasi-bidirectional I/O port; or DTMF clock output
P0.0 to P0.3			23 to	26	I/O	4 bits of Port 0: 8-bit quasi-bidirectional I/O port
XTAL1			27		I	crystal oscillator/external clock input
XTAL2			28		O	crystal oscillator output
P0.4 to P0.7			29 to	32	I/O	4 bits of Port 0: 8-bit quasi-bidirectional I/O port
P1.0 to P1.2			33 to	35	I/O	3 bits of Port 1: 8-bit quasi-bidirectional I/O port
VSS			36		P	ground
TONE			37		O	DTMF output
VDD			38		P	positive supply voltage
P1.3 to P1.6			39 to	42	I/O	4 bits of Port 1: 8-bit quasi-bidirectional I/O port
P1.7/MDY			43		I/O	1 bit of Port 1: 8-bit quasi-bidirectional I/O port; or melody output
P2.0			44		I/O	1 bit of Port 2: 4-bit quasi-bidirectional I/O port

1996 Dec 18

6

Philips Semiconductors	Product specification

8-bit microcontrollers with DTMF

PCA3354C; PCD3354A

generator and 256 bytes EEPROM

6 FREQUENCY GENERATOR

A versatile frequency generator section with built-in programmable clock divider is provided (see Fig.3). The clock divider allows the DTMF section to run either

with the main clock frequency (fDTMF = fxtal) or with a third of it (fDTMF = 1¤3 ´ fxtal) depending on the state of the divider control bit DIV3 (see Table 5). The frequency generator

includes precision circuitry for dual tone multifrequency (DTMF) signals, which is typically used for tone dialling telephone sets.

6.1Frequency generator derivative registers

6.1.1HIGH AND LOW GROUP FREQUENCY REGISTERS

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. Their frequencies are provided either in purely sinusoidal form on the TONE output or as a square wave on the port line P1.7/MDY. The latter is typically for ringer applications in telephone sets. If no frequency output is selected the TONE output is in 3-state mode.

Table 3 gives the addresses, symbols and access types of the High Group Frequency (HGF) and Low Group Frequency (LGF) registers, used to set the frequency output.

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

REGISTER	REGISTER	ACCESS				BIT SYMBOLS
ADDRESS	SYMBOL	TYPE	7	6	5	4	3	2	1	0
11H	HGF	W	H7	H6	H5	H4	H3	H2	H1	H0
12H	LGF	W	L7	L6	L5	L4	L3	L2	L1	L0

6.1.2CLOCK AND MELODY CONTROL REGISTER (MDYCON)

Table 4 Clock and Melody Control Register, MDYCON (address 13H; access type R/W)

7	6	5	4		3	2	1		0
0	0	0	0		0	EDCO	DIV3		EMO
Table 5 Description of MDYCON bits
BIT	SYMBOL				DESCRIPTION
7 to 3	-	These bits are set to a logic 0.
2	EDCO	Enable DTMF clock output. If bit EDCO = 0, then DP1.7/DCO is a general purpose
		derivative port line. If bit EDCO = 1, then DP1.7/DCO is the DTMF clock output.
		EDCO = 1 does not inhibit the port instructions for DP1.7/DCO. Therefore the state of
		both port line and flip-flop may be read in and the port flip-flop may be written by
		derivative port instructions. However, the port flip-flop of DP1.7/DCO must remain set to
		avoid conflicts between DTMF clock and port outputs.
1	DIV3	Enable DTMF clock divider. If bit DIV3 = 0, then the DTMF clock fDTMF = fxtal.
		If bit DIV3 = 1, then fDTMF = 1¤3 ´ fxtal.
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 HIGH state.

1996 Dec 18

7

Philips Semiconductors	Product specification

8-bit microcontrollers with DTMF

PCA3354C; PCD3354A

generator and 256 bytes EEPROM

fxtal

	8	CLOCK AND MELODY
		CONTROL REGISTER
	8	HGF REGISTER
8	INTERNAL BUS
	8	LGF REGISTER

	CLOCK	fDTMF				PORT/CLOCK		DP1.7/
	DIVIDER
						OUTPUT LOGIC		DCO

PORT/MELODY

P1.7/

OUTPUT LOGIC

MDY

square wave

DIGITAL

SINE WAVE

SYNTHESIZER

DAC

SWITCHED

SWITCHED

CAPACITOR

CAPACITOR

RC LOW-PASS

TONE

BANDGAP

LOW-PASS

FILTER

VOLTAGE

FILTER

REFERENCE

MGB782

DAC

DIGITAL

SINE WAVE

SYNTHESIZER

Fig.3 Block diagram of the frequency generator, melody output (P1.7/MDY) and DTMF clock output (DP1.7/DCO).

6.2Melody output (P1.7/MDY)

The melody output (P1.7/MDY) is very useful for generating musical notes 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 notes 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 (see equation in Section 6.4) being 2 for the P1.7/MDY output, rather than 60 for the TONE output. 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 13, Table 24.

6.3DTMF clock divider and output (DP1.7/DCO)

The DTMF clock divider allows the DTMF part to run either

with the main clock frequency (fDTMF = fxtal) or with a third of it (fDTMF = 1¤3 ´ fxtal) depending on the state of the divider control bit DIV3 in register MDYCON.

For low power applications, a 3.58 MHz quartz crystal or PXE resonator can be chosen together with the divide-by-one function of the clock divider.

For other applications a 10.74 MHz quartz crystal or PXE resonator may be chosen together with the divide-by-three function of the clock divider. This triples the program speed of the microcontroller, thereby keeping the assumed DTMF frequency of 3.58 MHz.

Since a 3.58 MHz clock is needed for peripheral telephony circuits such as the analog voice scrambler/descrambler PCD4440T, a switchable DTMF clock output is provided depending on the state of the enable clock output bit EDCO in register MDYCON.

1996 Dec 18

8

Philips Semiconductors	Product specification

8-bit microcontrollers with DTMF

PCA3354C; PCD3354A

generator and 256 bytes EEPROM

If EDCO = 1 and DIV3 = 1 in the MDYCON register:

a square wave with the frequency fDTMF = 1¤3 ´ fxtal is output on the derivative port line DP1.7/DCO. If EDCO = 1

and DIV3 = 0: a square wave with the frequency

fDTMF = fxtal is output on the derivative port line DP1.7/DCO.

The melody output drive depends on the configuration of port P1.7/MDY, see Chapter 13, Table 24.

6.4Frequency registers

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. 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 ‘f’ of the sine wave generated from either of the frequency registers is a function of the clock frequency

‘fxtal’ and the decimal value ‘x’ held in the register. The equation relating these variables is:

fxtal		£ x £ 255.
f = ---------------------------------[23 (x + 2) ]	; where 60

The frequency limitation given by x ³ 60 is due to the low-pass filters which would attenuate higher frequency sine waves.

6.5DTMF frequencies

Assuming an oscillator frequency fxtal = 3.58 MHz, the DTMF standard frequencies can be implemented as

shown in Table 6.

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

Table 6 DTMF standard frequencies and their implementation; value = LGF, HGF contents

VALUE	FREQUENCY (Hz)		DEVIATION
(HEX)	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	DTMF FREQ.	LGF	HGF
KEYBOARD	PAIRS	VALUE	VALUE
SYMBOLS	(Hz)	(HEX)	(HEX)
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

1996 Dec 18

9

Philips Semiconductors	Product specification

8-bit microcontrollers with DTMF

PCA3354C; PCD3354A

generator and 256 bytes EEPROM

6.6Modem frequencies

Again assuming an oscillator frequency fxtal = 3.58 MHz, 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
		MODEM	GENERATED	(%)	(Hz)
	(HEX)
	9D	980(1)	978.82	−0.12	−1.18
	82	1180(1)	1179.03	−0.08	−0.97
	8F	1070(2)	1073.33	0.31	3.33
	79	1270(2)	1265.30	−0.37	−4.70
	80	1200(3)	1197.17	−0.24	−2.83
	45	2200(3)	2192.01	−0.36	−7.99
	76	1300(4)	1296.94	−0.24	−3.06
	48	2100(4)	2103.14	0.15	3.14
	5C	1650(1)	1655.66	0.34	5.66
	52	1850(1)	1852.77	0.15	2.77
	4B	2025(2)	2021.20	−0.19	−3.80
	44	2225(2)	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.

6.7Musical scale frequencies

Finally, two octaves of musical scale in steps of semitones can be realized, again assuming an oscillator frequency

fxtal = 3.58 MHz (Table 9). It is suggested to define the frequency by the HGF register while the LGF contains

00H, disabling Low Group Frequency generation.

Table 9 Musical scale frequencies and their implementation

		HGF	FREQUENCY (Hz)
	NOTE	VALUE
			STANDARD(1)	GENERATED
		(HEX)
	D#5	F8	622.3	622.5
	E5	EA	659.3	659.5
	F5	DD	698.5	697.9
	F#5	D0	740.0	741.1
	G5	C5	784.0	782.1
	G#5	B9	830.6	832.3
	A5	AF	880.0	879.3
	A#5	A5	923.3	931.9
	B5	9C	987.8	985.0
	C6	93	1046.5	1044.5
	C#6	8A	1108.7	1111.7
	D6	82	1174.7	1179.0
	D#6	7B	1244.5	1245.1
	E6	74	1318.5	1318.9
	F6	6D	1396.9	1402.1
	F#6	67	1480.0	1482.2
	G6	61	1568.0	1572.0
	G#6	5C	1661.2	1655.7
	A6	56	1760.0	1768.5
	A#6	51	1864.7	1875.1
	B6	4D	1975.5	1970.0
	C7	48	2093.0	2103.3
	C#7	44	2217.5	2223.3
	D7	40	2349.3	2358.1
	D#7	3D	2489.0	2470.4

Note

1. Standard scale based on A4 @ 440 Hz.

1996 Dec 18

10