UPD78P083GB-3BS-MTX-A Datasheet, PDF (21/58 Pages) Renesas Technology Corp – 8-BIT SINGLE-CHIP MICROCONTROLLER

µPD78P083
4. PROM PROGRAMMING
The µPD78P083 has an internal 24-Kbyte PROM as a program memory. For programming, set the PROM programming
mode with the VPP and RESET pins. For the connection of unused pins, refer to “PIN CONFIGURATIONS (TOP VIEW)
(2) PROM programming mode.”
Caution Programs must be written in addresses 0000H to 5FFFH (The last address 5FFFH must be specified).
They cannot be written by a PROM programmer which cannot specify the write address.
4.1 Operating Modes
When +5 V or +12.5 V is applied to the VPP pin and a low-level signal is applied to the RESET pin, the PROM programming
mode is set. This mode will become the operating mode as shown in Table 4-1 when the CE, OE, and PGM pins are set
as shown.
Further, when the read mode is set, it is possible to read the contents of the PROM.
Table 4-1. Operating Modes of PROM Programming
Pin
Operating Mode
Page data latch
Page write
Byte write
Program verify
Program inhibit
RESET
L
Read
Output disable
Standby
x : L or H
VPP
VDD
CE
+12.5 V
+6.5 V
H
H
L
L
x
x
+5 V
+5 V
L
L
H
OE
PGM
D0 to D7
L
H
H
L
H
L
L
H
H
H
L
L
L
H
H
x
x
x
Data input
High-impedance
Data input
Data output
High-impedance
Data output
High-impedance
High-impedance
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