Philips Semiconductors
Product specification
8-bit microcontroller with DTMF generator,
256 bytes EEPROM and real-time clock
CONTENTS
1
2
3
4
5
5.1
5.2
6
6.1
6.2
6.3
6.4
6.5
6.6
6.7
7
7.1
7.2
7.3
7.4
7.5
7.6
8
8.1
8.2
8.3
8.4
FEATURES
GENERAL DESCRIPTION
ORDERING INFORMATION
BLOCK DIAGRAM
PINNING INFORMATION
Pinning
Pin description
FREQUENCY GENERATOR
Frequency generator derivative registers
Melody output (P1.7/MDY)
DTMF clock divider and output (DP1.7/DCO)
Frequency registers
DTMF frequencies
Modem frequencies
Musical scale frequencies
EEPROM AND TIMER 2 ORGANIZATION
EEPROM registers
EEPROM latches
EEPROM flags
EEPROM macros
EEPROM access
Timer 2
REAL-TIME CLOCK
Oscillator
Divider chain
Frequency adjustment
Real-time clock derivative registers
9
10
11
12
13
14
15
16
17
18
19
20
21
21.1
21.2
21.3
21.4
22
23
PCD3350A
DERIVATIVE INTERRUPTS
TIMING
RESET
IDLE MODE
STOP MODE
SUMMARY OF I/O PORTS AND ROM MASK
OPTIONS
SUMMARY OF DERIVATIVE REGISTERS
HANDLING
LIMITING VALUES
DC CHARACTERISTICS
AC CHARACTERISTICS
PACKAGE OUTLINES
SOLDERING
Introduction
Reflow soldering
Wave soldering
Repairing soldered joints
DEFINITIONS
LIFE SUPPORT APPLICATIONS
1996 Dec 18
2
Philips Semiconductors
Product specification
8-bit microcontroller with DTMF generator,
256 bytes EEPROM and real-time clock
1
FEATURES
PCD3350A
•
8-bit CPU, ROM, RAM, EEPROM, real-time clock 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)
•
32 kHz crystal oscillator for Real-Time Clock (RTC)
•
EEPROM programmable RTC
•
Over 100 instructions (based on MAB8048) all of
1 or 2 cycles
•
34 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
3
ORDERING INFORMATION
(see note 1)
•
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
•
Manufactured in silicon gate CMOS process.
2
GENERAL DESCRIPTION
This data sheet details the specific properties of the
PCD3350A. 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 PCD3350A is a microcontroller designed primarily for
telephony applications. It includes 8 kbytes ROM,
256 bytes RAM, 34 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 PCD3350A also incorporates 256 bytes of EEPROM,
permitting data storage without battery backup. The
EEPROM can be used for storing telephone numbers,
particularly for implementing redial functions.
Finally, the PCD3350A includes a low power 32 kHz
crystal oscillator with an EEPROM programmable
Real-Time Clock (RTC) working in standby mode.
The instruction set is similar to that of the MAB8048 and is
a sub-set of that listed in the
“PCD33xxA family”
data
sheet.
PACKAGE
TYPE NUMBER
NAME
PCD3350AH
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.
QFP44
DESCRIPTION
plastic quad flat package; 44 leads (lead length 2.35 mm);
body 14
×
14
×
2.2 mm
VERSION
SOT205-1
1996 Dec 18
3
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