Philips PCA3354C, PCD3354A Datasheet

INTEGRATED CIRCUITS

DATA SH EET

PCA3354C; PCD3354A

8-bit microcontrollers with DTMF
generator and 256 bytes EEPROM

Product specification
Supersedes data of 1996 May 09
File under Integrated Circuits, IC03

1996 Dec 18

Philips Semiconductors Product specification

8-bit microcontrollers with DTMF
generator and 256 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 DTMF clock divider and output (DP1.7/DCO)

6.4 Frequency registers

6.5 DTMF frequencies

6.6 Modem frequencies

6.7 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 SUMMARY OF I/O PORTS AND MASK

OPTIONS
14 SUMMARY OF DERIVATIVE REGISTERS
15 HANDLING
16 LIMITING VALUES
17 DC CHARACTERISTICS
18 AC CHARACTERISTICS
19 PACKAGE OUTLINES
20 SOLDERING

20.1 Introduction

20.2 Reflow soldering

20.3 Wave soldering

20.4 Repairing soldered joints
21 DEFINITIONS
22 LIFE SUPPORT APPLICATIONS

PCA3354C; PCD3354A

1996 Dec 18 2

Philips Semiconductors Product specification

8-bit microcontrollers with DTMF
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.

PCA3354C; PCD3354A

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”

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

Table 1 Differences: PCA3354C and PCD3354A

TYPE V

PCA3354C fixed at 2.0 V ±0.3 V 0 to 50 °C
PCD3354A (1.2 to 3.6 V) ±0.5 V

Note

1. See Chapter 13, Table 24.

data sheet, which should be read in

“PCD33xxA family”

POR

(1)

data sheet.

AMBIENT

TEMP. RANGE

−25 to +70 °C

3 ORDERING INFORMATION (see note 1)

TYPE NUMBER

PCA3354CH QFP44 plastic quad flat package; 44 leads (lead length 2.35 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

NAME DESCRIPTION VERSION

body 14 × 14 × 2.2 mm

PACKAGE

SOT205-1

Philips Semiconductors Product specification

8-bit microcontrollers with DTMF
generator and 256 bytes EEPROM

4 BLOCK DIAGRAM

WORD

STATUS

PROGRAM

LOWER

COUNTER

PROGRAM

HIGHER

COUNTER

PROGRAM

8

58888

8

DP0.0 to DP0.7

8

P0.0 to P0.7

RESIDENT

BUFFER

DER. PORT 0

FLIP-FLOP

DER. PORT 0

PORT 0

BUFFER

PORT 0

FLIP-FLOP





ROM

8 kbytes

DECODE

PCA3354C; PCD3354A

8

REGISTER 0

REGISTER 1

REGISTER 2

REGISTER 3

REGISTER 4

REGISTER 5

REGISTER 6

REGISTER 7

DECOD

AND

DECODER

REGISTER

INSTRUCTION

8 LEVEL STACK

(VARIABLE LENGTH)

MULTIPLEXER

RAM

ADDRESS

REGISTER

8

88

DATA STORE

REGISTER BANK

OPTIONAL SECOND

E

FLAG

T1

CE/T0

TIMER





BRANCH

CONDITIONAL

RESIDENT RAM ARRAY

ACC

CARRY

LOGIC

256 bytes

TEST

ACC BIT

MED265

PCA3354C

PORT 1

8

4 8

BUFFER

BUFFER

DER. PORT 1

DTMF

f

FILTER

PORT 2

BUFFER

P1.0 to P1.7/MDY

DP1.0 to DP1.7/DCO

TONE

P2.0 to P2.3

PCD3354A

PORT 1

FLIP-FLOP

FLIP-FLOP

DER. PORT 1

PORT 2

FLIP-FLOP

BANK

MEMORY

FLIP-FLOPS

FREQ.

CLOCK

INTERNAL

SINE WAVE

GENERATOR

30

EVENT

TIMER/

COUNTER

32

T1

CONTROL

REGISTER

& MELODY

DTMF-CLOCK

LGF

REGISTER

HGF

REGISTER

8

88

REGISTER 1

TEMPORARY

8

8

timer interrupt

ACCUMULATOR

8

8

LOGIC

INTERRUPT

8

8

8

8

8

8

8

4

8

DATA

EEPROM

TRANSFER

EEPROM

ADDRESS

REGISTER

EEPROM

CONTROL

REGISTER

TIMER 2

REGISTER

TIMER 2

RELOAD

REGISTER

derivative

ARITHMETIC

REGISTER 2

TEMPORARY

interrupt

LOGIC UNIT

EEPROM

256 bytes

POR

V

POWER-ON-RESET

ADJUST

DECIMAL

external interrupt

RESET

XTAL2XTAL1RESET

OSCILLATOR

CONTROL AND TIMING

CE/T0

INTERRUPT INITIALIZE

IDLE

STOP

handbook, full pagewidth

Fig.1 Block diagram.

1996 Dec 18 4

Philips Semiconductors Product specification

8-bit microcontrollers with DTMF
generator and 256 bytes EEPROM

5 PINNING INFORMATION

5.1 Pinning

handbook, full pagewidth

P2.0

P1.7/MDY

44

43

1

P2.1

2

P2.2

3

P2.3

4

DP0.0



5

DP0.1

6

DP0.2
DP0.3

7

DP0.4

8

DP0.5

9

DP0.6

10

DP0.7

11

P1.6

P1.5

42

41

PCA3354CH
PCD3354AH

P1.4
40

P1.3
39

V

DD

38

TONE
37

PCA3354C; PCD3354A

SS

P1.1

V

P1.2

36

35

34

33

P1.0
P0.7

32
31

P0.6

30

P0.5
P0.4

29
28

XTAL2
XTAL1

27

P0.3

26

P0.2

25
24

P0.1
P0.0

23

12

13

14

15

16

T1

CE/T0

DP1.0

RESET

DP1.1

Fig.2 Pin configuration.

17

DP1.2

18

DP1.3

19

DP1.4

20

DP1.5

21

22

DP1.6

DP1.7/DCO

MED266

1996 Dec 18 5

Philips Semiconductors Product specification

8-bit microcontrollers with DTMF

PCA3354C; PCD3354A

generator and 256 bytes EEPROM

5.2 Pin 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

T0 12 I Chip Enable or Test 0 input

CE/
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
V

SS

TONE 37 O DTMF output
V

DD

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

36 P ground

38 P positive supply voltage

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 (f
of it (f

DTMF

=1⁄3× f

) depending on the state of the divider

xtal

DTMF=fxtal

) or with a third

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.

6.1 Frequency generator derivative registers

6.1.1 H

IGH AND LOW GROUP FREQUENCY REGISTERS

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

ADDRESS

REGISTER

SYMBOL

ACCESS

TYPE

7 6 5 4 3 2 1 0

11H HGF W H7H6H5H4H3H2H1H0

12H LGF W L7L6L5L4L3L2L1L0

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.

BIT SYMBOLS

6.1.2 CLOCK 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

7to3 − 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 f

If bit DIV3 = 1, then f

DTMF

=1⁄3× f

xtal

.

DTMF=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
generator and 256 bytes EEPROM

handbook, full pagewidth

8

8

8

INTERNAL BUS

8

f

xtal

CLOCK AND MELODY

CONTROL REGISTER

HGF REGISTER

LGF REGISTER

CLOCK

DIVIDER

DIGITAL

SINE WAVE

SYNTHESIZER

SWITCHED

CAPACITOR

BANDGAP
VOLTAGE

REFERENCE

DIGITAL

SINE WAVE

SYNTHESIZER

f

square wave

DAC

DAC

DTMF

CAPACITOR

SWITCHED
LOW-PASS

FILTER

PCA3354C; PCD3354A

PORT/CLOCK

OUTPUT LOGIC

PORT/MELODY

OUTPUT LOGIC

RC LOW-PASS

FILTER

MGB782

DP1.7/

DCO

P1.7/
MDY

TONE

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

6.2 Melody 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

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

The DTMF clock divider allows the DTMF part to run either
with the main clock frequency (f
of it (f

DTMF

=1⁄3× f

) depending on the state of the divider

xtal

DTMF=fxtal

) or with a third

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.

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

1996 Dec 18 8

Philips Semiconductors Product specification

8-bit microcontrollers with DTMF
generator and 256 bytes EEPROM

If EDCO = 1 and DIV3 = 1 in the MDYCON register:
a square wave with the frequency f
output on the derivative port line DP1.7/DCO. If EDCO = 1
and DIV3 = 0: a square wave with the frequency
f

DTMF=fxtal

DP1.7/DCO.
The melody output drive depends on the configuration of

port P1.7/MDY, see Chapter 13, Table 24.

6.4 Frequency 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

’ and the decimal value ‘x’ held in the register.

‘f

xtal

The equation relating these variables is:

=

f

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

is output on the derivative port line

f

xtal

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

; where 60 ≤ x ≤ 255.

DTMF

=1⁄3× f

xtal

is

PCA3354C; PCD3354A

Table 6 DTMF standard frequencies and their

implementation; value = LGF, HGF contents

VALUE

(HEX)

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

TELEPHONE

KEYBOARD

SYMBOLS

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

FREQUENCY (Hz) DEVIATION

STANDARD GENERATED (%) (Hz)

frequency pairs and frequency register contents

DTMF FREQ.

PAIRS

(Hz)

LGF

VALUE

(HEX)

VALUE

HGF

(HEX)

6.5 DTMF frequencies

Assuming an oscillator frequency f
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.

1996 Dec 18 9

= 3.58 MHz, the

xtal

Philips Semiconductors Product specification

8-bit microcontrollers with DTMF
generator and 256 bytes EEPROM

6.6 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.

6.7 Musical scale frequencies

= 3.58 MHz,

xtal

PCA3354C; PCD3354A

Table 9 Musical scale frequencies and their

implementation

HGF

NOTE

VALUE

(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

FREQUENCY (Hz)

STANDARD

(1)

GENERATED

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

= 3.58 MHz (Table 9). It is suggested to define the

f

xtal

frequency by the HGF register while the LGF contains
00H, disabling Low Group Frequency generation.

1996 Dec 18 10

Note

1. Standard scale based on A4 @ 440 Hz.