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HN58V65API-10 bảng dữ liệu(PDF) 21 Page - Renesas Technology Corp

tên linh kiện HN58V65API-10
Giải thích chi tiết về linh kiện  64k EEPROM (8-kword x 8-bit) Ready/Busy function, RES function (HN58V66A) Wide Temperature Range version
PDF  28 Pages
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nhà sản xuất  RENESAS [Renesas Technology Corp]
Trang chủ  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

HN58V65API-10 bảng dữ liệu(HTML) 21 Page - Renesas Technology Corp

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



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