UPD78P083GB-3BS-MTX-A Datasheet, PDF (27/58 Pages) Renesas Technology Corp – 8-BIT SINGLE-CHIP MICROCONTROLLER

µPD78P083
4.3 PROM Read Procedure
The contents of PROM are readable to the external data bus (D0-D7) according to the read procedure shown below.
(1) Fix the RESET pin at low level, supply +5 V to the VPP pin, and connect all other unused pins as shown in “PIN
CONFIGURATIONS (TOP VIEW) (2) PROM programming mode”.
(2) Supply +5 V to the VDD and VPP pins.
(3) Input address of read data into the A0-A16 pins.
(4) Read mode
(5) Output data to D0-D7 pins.
The timings of the above steps (2) to (5) are shown in Figure 4-5.
Figure 4-5. PROM Read Timings
A0-A14
Address Input
CE (Input)
OE (Input)
D0-D7
Hi-Z
Hi-Z
Data Output
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