參數(shù)資料
型號: UPD78P4038YGC-3B9
廠商: NEC Corp.
英文描述: 16/8-BIT SINGLE-CHIP MICROCONTROLLER
中文描述: 16/8-BIT單片機(jī)
文件頁數(shù): 27/72頁
文件大?。?/td> 435K
代理商: UPD78P4038YGC-3B9
μ
PD78P4038Y
27
6.3 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)
in
Chapter 2
with regard to handling 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.
Figure 6-5 shows the timing of steps (2) to (5) above.
Figure 6-5. PROM Read Timing
Address input
Data output
CE (input)
A0-A16
OE (input)
D0-D7
Hi-Z
Hi-Z
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