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參數(shù)資料
| 型號： | μPD78P083A) |
| 廠商： | NEC Corp. |
| 英文描述： | 8 Bit Single Chip Microcontrollers(8位單片微控制器) |
| 中文描述： | 8位單片機微控制器（8位單片微控制器） |
| 文件頁數(shù)： | 19/44頁 |
| 文件大?。?/td> | 301K |
| 代理商： | ΜPD78P083A) |
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19
m
PD78P083(A)
Pin
RESET
V
PP
V
DD
CE
OE
PGM
D0 to D7
Operating Mode
Page data latch
L
+12.5 V
+6.5 V
H
L
H
Data input
Page write
H
H
L
High-impedance
Byte write
L
H
L
Data input
Program verify
L
L
H
Data output
Program inhibit
x
H
H
High-impedance
x
L
L
Read
+5 V
+5 V
L
L
H
Data output
Output disable
L
H
x
High-impedance
Standby
H
x
x
High-impedance
x : L or H
4.
PROM PROGRAMMING
The μPD78P083(A) has an internal 24-Kbyte PROM as a program memory. For programming, set the PROM
programming mode with the V
PP
and RESET pins. For the connection of unused pins, refer to
“PIN CONFIGURA-
TIONS (TOP VIEW) (2) PROM programming mode.”
Caution
Programs must be written in addresses 0000H to 5FFFH (The last address 5FFFH must be
specified). They cannot be written by a PROM programmer which cannot specify the write address.
4.1
Operating Modes
When +5 V or +12.5 V is applied to the V
PP
pin and a low-level signal is applied to the RESET pin, the PROM
programming mode is set. This mode will become the operating mode as shown in Table 4-1 when the CE, OE, and
PGM pins are set as shown.
Further, when the read mode is set, it is possible to read the contents of the PROM.
Table 4-1. Operating Modes of PROM Programming
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