UPD78F9177 Datasheet, PDF (48/56 Pages) NEC – 8-BIT SINGLE-CHIP MICROCONTROLLER

µPD78F9177, 78F9177Y
APPENDIX A. DIFFERENCES BETWEEN µPD78F9177, 78F9177Y, AND MASK ROM VERSIONS
The µPD78F9177 and µPD78F9177Y are flash memory version of the Mask ROM version. The differences
between the µPD78F9177, 78F9177Y and the Mask ROM versions are shown in Table A-1.
Table A-1. Differences between µPD78F9177, 78F9177Y and Mask ROM Versions
Product Name
Flash Memory Version
µPD78F9177, 78F9177Y
Item
Internal
memory
ROM
High-speed RAM
24 KB
512 bytes
VPP pin
Provided
Pull-up resistor
17 (Software control)
A/D resolution
10 bits
Electrical specifications
See the relevant data sheet
Mask ROM Version
µPD789166, 789166Y
µPD789167, 789167Y
789176, 789176Y
789177, 789177Y
16 KB
24 KB
Not provided
21 (Software control: 17, mask option specification: 4)
8 bits (µPD789166, 789167, 789166Y, 789167Y)
10 bits (µPD789176, 789177, 789176Y, 789177Y)
Cautions 1. There are differences in the amount of noise immunity and noise radiation between the
flash memory and mask ROM versions. When pre-producing an application set with the
flash memory version and then mass producing it with the mask ROM versions, be sure
to conduct sufficient evaluations on the commercial samples (CS) (not engineering
sample, ES) of the mask ROM version.
2. When the µPD78F9177, a flash memory counterpart of the µPD789166 or µPD789167, is
used, however, ADCR0 can be manipulated with an 8-bit memory manipulation
instruction. In this case, use an object file assembled with the µPD789166 or µPD789167.
The same is also true for the µPD78F9177Y, a flash memory counterpart of the
µPD789166Y or µPD789167Y. When the µPD78F9177Y is used, ADCR0 can be
manipulated with an 8-bit memory manipulation instruction. In this case, use an object
file assembled with the µPD789166Y or µPD789167Y.
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Data Sheet U14022EJ1V0DS00