參數(shù)資料
型號: μPD78P4038
廠商: NEC Corp.
英文描述: 8/16 Bit Single Chip Microcontrollers(8/16位單片微控制器)
中文描述: 8 / 16位單片機微控制器(8 / 16位單片微控制器)
文件頁數(shù): 21/72頁
文件大?。?/td> 325K
代理商: ΜPD78P4038
μ
PD78P4038
21
6. PROM PROGRAMMING
The
μ
PD78P4038 has an on-chip 128-KB PROM device for use as program memory. When programming, set
the V
PP
and RESET pins for PROM programming mode. See
(2)
in
Chapter 2
with regard to handling of other, unused
pins.
6.1 Operation Mode
PROM programming mode is selected when +5 V or +12.5 V is added to the V
PP
pin or low-level input is added
to the RESET pin. This mode can be set to operation mode by setting the CE pin, OE pin, and PGM pin as shown
in Table 6-1 below.
In addition, the PROM contents can be read by setting read mode.
Table 6-1. PROM Programming Operation Mode
Remark
×
= L or H
Pin
RESET
V
PP
V
DD
CE
OE
PGM
D0-D7
Operation 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
×
H
H
High impedance
×
L
L
Read
+5 V
+5 V
L
L
H
Data output
Output disable
L
H
×
High impedance
Standby
H
×
×
High impedance
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