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參數(shù)資料
| 型號(hào)： | μPD78F0974 |
| 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(jī)微控制器 |
| 文件頁(yè)數(shù)： | 9/40頁(yè) |
| 文件大?。?/td> | 232K |
| 代理商： | ΜPD78F0974 |
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9
m
PD78F0974
1.
DIFFERENCES BETWEEN
m
PD78F0974 AND MASK ROM VERSION
The
m
PD78F0974 is a product provided with a flash memory which enables on-board reading, erasing, and rewriting
of programs with device mounted on target system.
The functions of the
m
PD78F0974 (except the functions specified for flash memory) can be made the same as those
of the mask ROM version by setting the memory size switching register (IMS).
Table 1-1 shows the differences between the flash memory version (
m
PD78F0974) and the mask ROM version
(
m
PD780973(A)).
Table 1-1. Differences between
m
PD78F0974 and Mask ROM Version
Item
m
PD78F0974
m
PD780973(A)
Internal ROM structure
Flash memory
Mask ROM
Internal ROM capacity
32 Kbytes
24 Kbytes
Internal high-speed RAM capacity
1024 bytes
768 bytes
Internal ROM and internal high-speed RAM
Changeable
Note
Not changeable
capacity changeable/not changeable with
memory size switching register
IC pin
Not provided
Provided
V
PP
pin
Provided
Not provided
Electrical specifications
Refer to the data sheet of individual products.
Quality grade
Standard
Special
Note
The default is CFH, but set the value as indicated below.
IMS set value
Flash memory
Internal high-speed RAM
Remarks
06H
24 Kbytes
768 bytes
When making to the same as the memory
mapping of
m
PD780973(A)
C8H
32 Kbytes
1024 bytes
At maximum
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