hn58v66ati-10e Renesas Electronics Corporation., hn58v66ati-10e Datasheet - Page 21

• Manufacturer Part Number: hn58v66ati-10e
• Description: 64k Eeprom 8-kword X 8-bit Ready/busy Function, Res Function Hn58v66a Wide Temperature Range Version
• Manufacturer: Renesas Electronics Corporation.

HN58V65AI/HN58V66AI/HN58V65A-SR/HN58V66A-SR Series
2. Data protection at V
Note: The EEPROM should be kept in unprogrammable state during V
×: Don’t care.
V
V
Rev.3.00, Feb.02.2004, page 21 of 26
CC
SS
When V
act 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.
2.1 Protection by
: Pull-down to V
: Pull-up to V
table below.
To realize the unprogrammable state, the input level of control pins must be held as shown in the
signal.
CC
is turned on or off, noise on the control pins generated by external circuits (CPU, etc) may
CC
level.
SS
level.
CPU
CC
RESET
V
,
CC
on/off
*
V
×
×
,
Unprogrammable
CC
×
V
×
SS
*
Unprogrammable
CC
on/off by using CPU RESET
×
×
V
CC