參數(shù)資料
型號： μPD70P3002
廠商： NEC Corp.
英文描述： 16/32 Single -Chip Microcontroller(16/32 位單片微控制器)
中文描述： 16/32單片機（16/32位單片微控制器）
文件頁數(shù)： 14/56頁
文件大小： 367K
代理商： ΜPD70P3002
μ
PD70P3002
14
3. PROM PROGRAMMING
The
μ
PD70P3002 has a 90 Kbytes
×
8 bit PROM that can be electrically written. To program this PROM,
set the PROM programming mode by using the V
PP
, MODE0, and MODE1 pins.
The programming characteristics are compatible with those of the
μ
PD27C1001A.
Table 3-1. Pin Functions in PROM Programming Mode
Function
Normal Operation Mode
PROM Programming Mode
Address input
P60/A16 to P67/A23, P50/AD8, P20/NMI, P51/AD9 to P57/AD15
A0 to A16
Data I/O
P40/AD0 to P47/AD7
D0 to D7
Program input
P27/SCK2
PGM
Chip enable input
P25/SO2
CE
Output enable input
P26/SI2
OE
Program voltage
IC0
V
PP
Mode specification
MODE0, MODE1
3.1 Operation Mode
To set the programming writing/verify mode, set as follows: V
PP
= +12.5 V, MODE0 = H, MODE1 = H
In this mode, the modes shown in Table 3-2 can be selected by using the CE, OE, and PGM pins.
To read the contents of the PROM, set the read mode.
Connect the unused pins by referring to the diagram in
PIN CONFIGURATION
.
Table 3-2. Operation Modes for PROM Programming
Operation Mode
MODE0 MODE1
CE
OE
PGM
V
PP
V
DD
D0 to D7
Page data latch mode
H
H
H
L
H
+12.5 V
+6.5V
Data input
Page write mode
H
H
L
High impedance
Byte write mode
L
H
L
Data input
Program verify mode
L
L
H
Data output
Program inhibit mode
x
L
L
High impedance
Note
x
H
H
Read mode
L
L
H
+5.0 V
+5.0 V
Data output
Output disable mode
L
H
x
High impedance
Note
Standby mode
H
x
x
High impedance
Note
Note
L or H can be input (address input is invalid).
Remark
x: L or H
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