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PDF UPD754202GSA Data sheet ( Hoja de datos )
| Número de pieza | UPD754202GSA | |
| Descripción | 4-BIT SINGLE-CHIP MICROCONTROLLERS | |
| Fabricantes | NEC | |
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DATA SHEET
MOS INTEGRATED CIRCUIT
µPD754202, 754202(A)
4-BIT SINGLE-CHIP MICROCONTROLLERS
The µPD754202 is a member of the 75XL Series of 4-bit single-chip microcontrollers that enable data processing
equivalent to that of an 8-bit microcontroller.
It features expanded CPU functions compared to the 75X Series and enables high-speed, low-voltage operation
at 1.8 V, making it suitable for battery-driven applications.
The µPD754202(A) is a higher-reliability product compared to the µPD754202.
Detailed function descriptions, etc., are provided in the following user’s manual. Be sure to read it
when designing.
µPD754202 User’s Manual: U11132E
FEATURES
• Key return reset function for keyless entry
• Low-voltage operation: VDD = 1.8 to 6.0 V
• On-chip memory
• Program memory (ROM): 2048 × 8 bits
• Data memory (RAM) : 128 × 4 bits
• Variable instruction execution time useful for high-speed operation and power save
• 0.95, 1.91, 3.81, 15.3 µs (at 4.19-MHz operation)
• 0.67, 1.33, 2.67, 10.7 µs (at 6.0-MHz operation)
• Compact package (20-pin plastic shrink SOP (300 mil, 0.65-mm pitch))
APPLICATIONS
Automotive electronics such as keyless entry units
The µPD754202 and µPD754202(A) have different quality grades. Unless otherwise specified, descriptions in
this data sheet apply to the µPD754202.
The information in this document is subject to change without notice.
Document No. U12181EJ1V0DS00 (1st edition)
Date Published May 1997 N
Printed in Japan
©
1997
1 page  
µPD754202, 754202(A)
APPENDIX A. µPD754202, 75F4264 FUNCTION LIST ..................................................................... 58
APPENDIX B. DEVELOPMENT TOOLS ..............................................................................................59
APPENDIX C. RELATED DOCUMENTS ..............................................................................................62
5
5 Page 
µPD754202, 754202(A)
3.4 Recommended Connection of Unused Pins
Table 3-1. List of Recommended Connection of Unused Pins
Pin
P30/PTO0
P31/PTO1
P32/PTO2
P33
P60
P61/INT0
P62
P63
P70/KR4
P71/KR5
P72/KR6
P73/KR7
P80
KRREN
IC
Recommended Connecting Method
Input state : Independently connect to VSS or VDD via a resistor.
Output state: Leave open.
Connect to VDD.
Input state : Independently connect to VSS or VDD via a resistor.
Output state: Leave open.
When this pin is connected to VDD, internal reset signal is gener-
ated at the falling edge of the KRn pin in the STOP mode.
When this pin is connected to VSS, internal reset signal is not
generated even if the falling edge of KRn pin is detected in the
STOP mode.
Connect directly to VDD.
11
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