UPD784026 Renesas Electronics Corporation., UPD784026 Datasheet - Page 693

• Manufacturer Part Number: UPD784026
• Description: 16/8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

24.3 PROM READING PROCEDURE
(1) Fix the RESET pin low, and supply +5 V to the V
(2) Supply +5 V to the V
(3) Input address of data to be read to pins A0 to A16.
(4) Read mode.
(5) Output data to pins D0 to D7.
PROM contents can be read onto the external data bus (D0 to D7) using the following procedure.
The timing for steps (2) to (5) above is shown in Figure 24-5.
Mode in 1.3 PIN CONFIGURATION (Top View).
CE (Input)
OE (Input)
A0-A16
D0-D7
DD
and V
PP
pins.
CHAPTER 24
Hi-Z
Figure 24-5 PROM Read Timing
PP
pin. Unused pins are handled as shown in 1.3.2 PROM Programming
Address Input
PD78P4026 PROGRAMMING
Data Output
Hi-Z
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