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參數(shù)資料
| 型號(hào)： | ST72121J4 |
| 元件分類： | 8位微控制器 |
| 英文描述： | 8-bit Microcontroller with 2/4/8K Bytes In-System Programmable Flash |
| 中文描述： | 8位微控制器與2/4/8K字節(jié)在系統(tǒng)可編程閃存 |
| 文件頁數(shù)： | 11/93頁 |
| 文件大?。?/td> | 915K |
| 代理商： | ST72121J4 |
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ST72E121 ST72T121
1.5 OPTION BYTE
The user has the option to select software watch-
dog or hardware watchdog (see description in the
Watchdog chapter). When programming EPROM
or OTP devices, this option is selected in a menu
by the user of the EPROM programmer before
burning the EPROM/OTP. The Option Byte is lo-
cated in a non-user map. No address has to be
specified. The Option Byte is at FFh after UV eras-
ure and must be properly programmed to set de-
sired options.
OPTBYTE
Bit 7:4 = Not used
Bit 3 = Reserved, must be cleared.
Bit 2 = Reserved, must be set on ST72T121N de-
vices and must be cleared on ST72T121J devices.
Bit 1 = Not used
Bit 0 =
WDG
Watchdog disable
0: The Watchdog is enabled after reset (Hardware
Watchdog).
1: The Watchdog is not enabled after reset (Soft-
ware Watchdog).
7
0
-
-
-
-
b3
b2
-
WDG
11
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