DATA SHEET
MOS INTEGRATED CIRCUIT
µ
PD75212A
4-BIT SINGLE-CHIP MICROCOMPUTER
DESCRIPTION
The
µ
PD75212A is a microcomputer with a CPU capable of 1-, 4-, and 8-bit data processing, ROM, RAM, I/O ports,
a fluorescent display tube controller/driver, a watch timer, a timer/pulse generator capable of outputting 14-bit PWM,
a serial interface and a vectored interrupt function integrated on a single-chip.
The
µ
PD75212A is a version of the
µ
PD75216A with a small ROM capacity (12K).
The
µ
PD75212A uses the VCR, ECR and CD fluorescent display tubes as display devices and is most suitable for
applications requiring the timer/watch function and high-speed interrupt servicing. It can help to provide the unit
with many functions and to decrease performance costs.
Functions are described in detail in the following User’s Manual. Be sure to read when carrying out design work.
µ
PD75216A User’s Manual: IEM-988
FEATURES
•
•
•
•
Architecture equal to that of an 8-bit microcomputer
High-speed operation : Minimum instruction execution time : 0.95
µ
s (when operated at 4.19 MHz)
Instruction execution time variable function realizing a wide range of operating voltages
On-chip large-capacity program memory : 12K bytes
•
Watch operation with an ultra low current consumption : 5
µ
A TYP. (at the 3 V operation)
•
On-chip programmable fluorescent display tube controller/driver
•
Timer function : 4 ch
• 14-bit PWM output capability with the voltage synthesizer type electronic tuner
• Buzzer output capability
•
Interrupt function with importance attached to applications
• For power-off detection
• For remote controlled reception
•
Product with an on-chip PROM :
µ
PD75P216A,
µ
PD75P218 (on-chip EPROM : WQFN package)
APPLICATION FIELD
VCR, CD player, ECR, etc.
The information in this document is subject to change without notice.
Document No. IC-2584D
(O. D. No. IC-7552D)
Date Published February 1994 P
Printed in Japan
The mark
5
shows major revised points.
© NEC Corporation 1990
µ
PD75212A
ORDERING INFORMATION
Ordering Code
Package
64-pin plastic shrink DIP (750 mil)
64-pin plastic QFP (14
×
20 mm)
Quality Grade
Standard
Standard
µ
PD75212ACW-×××
µ
PD75212AGF-×××-3BE
Remarks
×××
is a ROM code number.
Please refer to “Quality grade on NEC Semiconductor Devices” (Document number IEI-1209) published by
NEC Corporation to know the specification of quality grade on the devices and its recommended applications.
2
µ
PD75212A
LIST OF FUNCTIONS
Item
Instruction execution time
Function
• 0.95, 1.91, 15.3
µ
s (Main system clock : 4.19 MHz operation)
• 122
µ
s (Subsystem clock : 32.768 kHz operation)
12160
×
8 bits
512
×
4 bits
• 4-bit manipulation : 8
×
4 banks
• 8-bit manipulation : 4
×
4 banks
33
8
20
CMOS input pin
CMOS input/output pins
• Direct LED drive capability : 8
• On-chip pull-down resistor by mask option capability : 4
PWM/pulse output
• LED drive capability
• On-chip pull-down resistor by mask option capability
On-chip memory
ROM
RAM
General register
Input/output port
FIP ® dual-function pin
included
FIP dedicated pin
excluded
FIP controller/driver
Timer
Serial interface
Vectored interrupt
Test input
System clock oscillator
Standby function
Mask option
Operating temperature range
Operating voltage
Package
•
•
•
•
•
1
4
CMOS output pin
P-ch open-drain,
high-voltage,
high-current output pin
No. of segments : 9 to 16 segments
No. of digits
: 9 to 16 digits
Dimmer function : 8 levels
On-chip pull-down resistor by mask option capability
Key scan interrupt generation
•
•
•
•
Timer/pulse generator : 14-bit PWM output enabled
Watch timer
: Buzzer output enabled
Timer/event counter
Basic interval timer
: Watchdog timer application capability
4 channels
• MSB start/LSB start switchable
• Serial bus configuration capability
External : 3, Internal : 5
External : 1, Internal : 1
• Ceramic/crystal oscillator for main system clock oscillation : 4.194304 MHz standard
• Crystal oscillator for subsystem clock oscillation : 32.768 kHz standard
STOP/HALT mode
• Power-on reset, power-on flag
• High-voltage port : Pull-down resistor or open-drain output
• Port 6 : Pull-down resistor
–40 to +85
°C
2.7 to 6.0 V (standby data retention : 2.0 to 6.0 V)
• 64-pin plastic shrink DIP (750 mil)
• 64-pin plastic QFP (14
×
20 mm)
3
µ
PD75212A
CONTENTS
1. PIN CONFIGURATION (TOP VIEW) ......................................................................................................... 6
2. BLOCK DIAGRAM ...................................................................................................................................... 8
3. PIN FUNCTIONS ........................................................................................................................................ 9
3.1 PORT PINS ............................................................................................................................................................. 9
3.2 NON-PORT PINS .................................................................................................................................................. 10
3.3 PIN INPUT/OUTPUT CIRCUIT LIST .................................................................................................................... 11
3.4 UNUSED PINS TREATMENT .............................................................................................................................. 12
3.5 P00/INT4 PIN AND RESET PIN OPERATING PRECAUTIONS ......................................................................... 13
3.6 XT1, XT2 AND P50 PIN OPERATING PRECAUTIONS ..................................................................................... 13
4. MEMORY CONFIGURATION ................................................................................................................... 14
5. PERIPHERAL HARDWARE FUNCTIONS ................................................................................................. 17
5.1 PORTS .................................................................................................................................................................... 17
5.2 CLOCK GENERATOR ............................................................................................................................................ 18
5.3
5.4
5.5
5.6
BASIC INTERVAL TIMER ..................................................................................................................................... 19
WATCH TIMER ...................................................................................................................................................... 20
TIMER/EVENT COUNTER ................................................................................................................................... 21
TIMER/PULSE GENERATOR ............................................................................................................................... 22
5.7 SERIAL INTERFACE ............................................................................................................................................. 23
5.8 FIP CONTROLLER /DRIVER ................................................................................................................................ 25
5.9 POWER-ON FLAG (MASK OPTION) ................................................................................................................... 27
6. INTERRUPT FUNCTIONS ......................................................................................................................... 28
7. STANDBY FUNCTIONS ............................................................................................................................ 30
8. RESET FUNCTIONS .................................................................................................................................. 31
9. INSTRUCTION SET ................................................................................................................................... 34
10. MASK OPTION SELECTION .................................................................................................................... 43
11. APPLICATION BLOCK DIAGRAM ............................................................................................................ 44
11.1 VCR TIMER TUNER ............................................................................................................................................. 44
11.2 CD PLAYER .......................................................................................................................................................... 45
11.3 ECR ....................................................................................................................................................................... 45
12. ELECTRICAL SPECIFICATIONS ............................................................................................................... 46
13. CHARACTERISTIC CURVES .................................................................................................................... 59
14. PACKAGE INFORMATION ....................................................................................................................... 63
4
µ
PD75212A
15. RECOMMENDED SOLDERING CONDITIONS ........................................................................................ 66
APPENDIX A. DEVELOPMENT TOOLS ......................................................................................................... 67
APPENDIX B. RELATED DOCUMENTS ......................................................................................................... 68
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