HD6435348R Hitachi Semiconductor, HD6435348R Datasheet - Page 328

• Manufacturer Part Number: HD6435348R
• Description: Single-Chip Microcomputer
• Manufacturer: Hitachi Semiconductor

17.4.2 Notes on Programming
1. Program with the specified voltages and timing.
Caution: Applied voltages in excess of the specified values can permanently destroy the chip. Be
particularly careful about the PROM writer’s overshoot characteristics.
If the PROM writer is set to Hitachi HN27C101 specifications, V
2. Before programming, check that the socket adapter and chip are correctly mounted in
The programming voltage (V
the PROM writer. Overcurrent damage to the chip can result if the index marks on the PROM
writer, socket adapter, and chip are not correctly aligned.
Address
Data
V
V
CE
PGM
OE
PP
CC
V
V
V
V
PP
CC
CC
CC
+1
t
t
CES
t
t
Figure 17-7 PROM Write/Verify Timing (H8/536)
t
VCS
DS
VPS
AS
Input data
t
PW
PP
) in PROM mode is 12.5 V.
Write
t
DH
315
t
OES
t
OE
PP
will be 12.5 V.
Verify
Output data
t
t
DF
AH