參數(shù)資料
型號(hào)： UPD178P018AGC
廠商： NEC Corp.
元件分類(lèi)： 8位微控制器
英文描述： 8-bit Microcontroller with 2/4/8K Bytes In-System Programmable Flash
中文描述： 8位微控制器與2/4/8K字節(jié)在系統(tǒng)可編程閃存
文件頁(yè)數(shù)： 16/60頁(yè)
文件大?。?/td> 325K
代理商： UPD178P018AGC
μ
PD178P018A
16
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
×
×
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
Remark
×
: L or H
2. PROM PROGRAMMING
The
μ
PD178P018A has an internal 60-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 EFFFH (the last address EFFFH must be
specified). They cannot be written by a PROM writer which cannot specify the write address.
2.1 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 2-1 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 2-1. Operating Modes of PROM Programming
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