UPD78P324(A) 查看數據表（PDF） - NEC => Renesas Technology

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UPD78P324(A)

16-/8-Bit Single-Chip Microcomputers

NEC => Renesas Technology 

µPD78P324, 78P324(A)

3.3 PROCEDURE FOR PROM READ

The PROM content is read to the external data bus (D0-D7) in accordance with the following procedure:

(1) Fix to RESET = H; and AVDD = L. Other unused pins are processed as directed by the PIN CONFIGURATION.

(2) Supply +5 V to the VDD and VPP pins.

(3) Enter the address of the data read into the A0-A16 pin.

(4) Read mode (CE = L; OE = L)

(5) Data is output to the D0-D7 pin.

The timing of the above (2) to (5) is shown in Figure 3-4.

Figure 3-4. PROM Read Timing

A0-A14

Address input

CE (input)

OE (input)

Hi-Z

D0-D7

Hi-Z

Data output

21

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