UPD784026 Renesas Electronics Corporation., UPD784026 Datasheet - Page 687

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

PROM programming mode is set by means of the V
1.3.2 PROM Programming Mode in 1.3 PIN CONFIGURATION (Top View).
24.1 OPERATING MODES
is placed in the PROM programming mode. This is one of the operating modes shown in Table 24-1 below according to
the setting of the CE, OE, and PGM pins.
Operating Mode
Page data latch
Page write
Byte write
Program verify
Program inhibit
Read
Output disable
Standby
The PD78P4026 incorporates a 64 K-byte PROM as program memory. When programming the PD78P4026, the
When +5 V or +12.5 V is applied to the V
The PROM contents can be read by setting the read mode.
Remark
: L or H
Pins
RESET
L
Table 24-1 PROM Programming Operating Modes
CHAPTER 24
+12.5 V
+5 V
V
PP
PP
pin and a low-level signal is applied to the RESET pin, the PD78P4026
PP
+6.5 V
PD78P4026 PROGRAMMING
+5 V
V
pin and the RESET pin. For the connection of unused pins, see
DD
CE
H
H
H
L
L
L
L
OE
H
H
H
H
L
L
L
L
PGM
H
H
H
H
L
L
L
High-impedance
Data input
High-impedance
Data output
High-impedance
High-impedance
Data input
Data output
D0-D7
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