HN27C4000G Renesas Electronics Corporation., HN27C4000G Datasheet - Page 15

• Manufacturer Part Number: HN27C4000G
• Description: 524288-word 8-bit/262144-word X 16-bit Cmos Uv Erasable And Programmable Rom - Hitachi Semiconductor
• Manufacturer: Renesas Electronics Corporation.

Fast High-Reliability Programming Timing Waveform
Optional Page Programming
This device can be applied the optional page
programming algorithm shown in the following
flowchart. This algorithm allows to obtain faster
programming time without any voltage stress to the
device nor deterioration in reliability of
programmed data.
This programming algorithm is the combination of
page programming and word verify. It can avoid
Address
V
Data
CE
OE
V
CC
PP
V
V
V
V
CC
CC
PP
CC
+1.25
t
t
VPS
VCS
t
t
t
AS
DS
DS
Data In Stable
t
PW
Program
t
DH
the increase of programming verify time when a
programmer with slow machine cycle is used, and
shorten the total programming time.
Regarding the timing specifications for page
programming and word verify, please refer to the
specifications for fast high-reliability page
programming
programming.
t
OES
t
OE
Program Verify
and
HN27C4000G Series
Data Out Valid
fast
high-reliability
t
t
AH
DF
15