參數(shù)資料
型號: μPD78P0208
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): 28/72頁
文件大?。?/td> 424K
代理商: ΜPD78P0208
28
m
PD78P0208
5.3 PROM READ SEQUENCE
Follow this sequence to read the PROM contents to an external data bus (D0 to D7).
(1) Set the RESET pin to low level and add +5 V to the V
PP
pin. See
(2) PROM programming mode
in PIN
CONFIGURATION (TOP VIEW) with regard to treatment of other, unused pins.
(2) Add +5 V to the V
DD
and V
PP
pins.
(3) Input the data address to be read to pins A0 to A16.
(4) Set read mode.
(5) Output the data to pins D0 to D7.
Fig. 5-5 shows the timing of steps (2) to (5) above.
Fig. 5-5 PROM Read Timing
Address input
Data output
CE (input)
A0-A16
OE (input)
D0-D7
Hi-Z
Hi-Z
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