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(jī)微控制器(16/32位單片微控制器)
文件頁數(shù): 20/72頁
文件大小: 334K
代理商: ΜPD70P3000
μ
PD70P3000
20
3.3 PROM Reading Procedure
The procedure to read the contents of the PROM to the external data bus (D0 through D7) is as follows:
(1) Fix the MODE0 and MODE1 pins to low level. Connect the unused pins by referring to the diagram in PIN
CONFIGURATION.
(2) Supply + 5 V to the V
DD
and V
PP
pins.
(3) Input the address of the data to be read to the A0 through A16 pins.
(4) Set the read mode (CE = L, OE = L).
(5) Data are output to pins D0 through D7.
Figure 3-5 shows the timing of steps (2) through (5) above.
Figure 3-5. PROM Reading Timing
A0-A16 (input)
CE (input)
OE (input)
D0-D7 (I/O)
Address input
Data output
Remark
The broken line indicates the high-impedance state.
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