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參數資料
| 型號： | μPD78P064 |
| 廠商： | NEC Corp. |
| 元件分類： | 8位微控制器 |
| 英文描述： | 8 Bit Single Chip Microcontrollers |
| 中文描述： | 8位單片機微控制器 |
| 文件頁數： | 13/70頁 |
| 文件大小： | 473K |
| 代理商： | ΜPD78P064 |
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13
m
PD78P064
1.
DIFFERENCES BETWEEN
m
PD78P064 AND MASK ROM PRODUCTS
The
m
PD78P064 is a single-chip microcontroller with an on-chip one-time writable PROM or with an on-chip EPROM
which has program write, erasure, and rewrite capability.
It is possible to make all the functions exception PROM specification, and mask option of LCD drive power supply dividing
resistor, to the same as those of mask ROM products by setting the memory size switching register (IMS).
Difference between the PROM product (
m
PD78P064) and mask ROM product (
m
PD78062, 78063, 78064) are shown
is Table 1-1.
Table 1-1. Differences between
m
PD78P064 and Mask ROM Products
Item
m
PD78P064
Mask ROM Products
Internal ROM structure
One-time PROM/EPROM
Mask ROM
Changing internal ROM/internal high-
speed RAM capacity by memory size
switching register (IMS)
Can be changed
Note
Cannot be changed
IC pin
No
Yes
V
PP
pin
Yes
No
Mask option of LCD drive power
supply dividing resistor
No
Yes
Electrical characteristics
Refer to
Data Sheet
for each product
Note
The internal PROM becomes to 32K bytes and the internal high-speed RAM becomes 1024 bytes by the RESET
input.
Caution
Noise resistance and noise radiation are different in PROM version and mask ROM versions. If using
a mask ROM version instead of the PROM version for processes between prototype development and
full production, be sure to fully evaluate the CS of the mask ROM version (not ES).
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