參數(shù)資料
型號: μPD70P3000
廠商: NEC Corp.
英文描述: 16/32 Bit Single Chip Microcontrollers(16/32位單片微控制器)
中文描述: 16/32位單片機微控制器(16/32位單片微控制器)
文件頁數(shù): 14/72頁
文件大?。?/td> 334K
代理商: ΜPD70P3000
μ
PD70P3000
14
3. PROM PROGRAMMING
The
μ
PD70P3000 has a 32K
×
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-P67/A23, P50/AD8, P20/NMI, P51/AD9-P57/AD15
A0-A16
Data I/O
P40/AD0-P47/AD7
D0-D7
Program input
P27
PGM
Chip enable input
P25
CE
Output enable input
P26
OE
Program voltage
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-D7
Page data latch mode
H
H
H
L
H
+ 12.5 V + 6.5 V
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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