參數(shù)資料
型號: μPD78P048A
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): 27/72頁
文件大?。?/td> 387K
代理商: ΜPD78P048A
m
PD78P048A
27
5.3 PROM Read Procedure
The contents of PROM are readable to the external data bus (D0 to D7) according to the read procedure shown
below.
(1) Fix the RESET pin at low level, supply +5 V to the V
PP
pin, and connect all other unused pins as shown in
PIN
CONFIGURATION (2) PROM programming mode
.
(2) Supply +5 V to the V
DD
and V
PP
pins.
(3) Input address of read data into the A0 to A16 pins.
(4) Read mode
(5) Output data to D0 to D7 pins.
The timings of the above steps (2) to (5) are shown in Figure 5-5.
Figure 5-5. PROM Read Timings
A0 – A16
D0 – D7
CE (Input)
OE (Input)
Hi-Z
Hi-Z
Data Output
Address Input
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