hn58c65 Renesas Electronics Corporation., hn58c65 Datasheet - Page 14

• Manufacturer Part Number: hn58c65
• Description: 8192-word X 8-bit Electrically Erasable And Programmable Cmos Rom
• Manufacturer: Renesas Electronics Corporation.

HN58C65 Series
2. Data Protection at V
CE
OE
WE
X: Don’t care.
V
V
CC
SS
: Pull-down to V
: Pull-up to V
When V
as a trigger and turn the EEPROM to program mode by mistake. To prevent this unintentional
programming, the EEPROM must be kept in an unprogrammable state while the CPU is in an unstable
state.
In addition, when V
table below.
CC
is turned on or off, noise on the control pins generated by external circuits (CPU, etc.) may act
CC
level
SS
level.
V
CPU
CC
CC
RESET
CC
is turned on or off, the input level of on control pins must be held as shown in the
V
X
X
On/Off
CC
*The EEPROM should be kept in unprogrammable
state during V
*
Unprogrammable
CC
on/off by using CPU RESET signal.
14
X
V
X
SS
*
Unprogrammable
X
X
V
CC