參數(shù)資料
型號: μPD78P054
廠商: NEC Corp.
元件分類: 8位微控制器
英文描述: 8 Bit Single Chip Microcontrollers
中文描述: 8位單片機微控制器
文件頁數(shù): 29/86頁
文件大小: 502K
代理商: ΜPD78P054
29
μ
PD78P054, 78P058
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
CONFIGURATIONS (Top View) (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 to A16
D0 to D7
CE (Input)
OE (Input)
Hi-Z
Hi-Z
Data Output
Address Input
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