參數(shù)資料
型號(hào): μPD70P3002
廠商: NEC Corp.
英文描述: 16/32 Single -Chip Microcontroller(16/32 位單片微控制器)
中文描述: 16/32單片機(jī)(16/32位單片微控制器)
文件頁(yè)數(shù): 20/56頁(yè)
文件大?。?/td> 367K
代理商: ΜPD70P3002
μ
PD70P3002
20
A0 to A16 (input)
CE (input)
OE (input)
D0 to D7 (I/O)
Address input
Data output
Remark
The broken line indicates the high-impedance state.
3.3 PROM Reading Procedure
The procedure to read the contents of the PROM to the external data bus (D0 to 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) PROM Programming mode
.
(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 to A16 pins.
(4) Set the read mode (CE = L, OE = L).
(5) Data are output to pins D0 to D7.
Figure 3-5 shows the timing of steps (2) to (5) above.
Figure 3-5. PROM Reading Timing
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