參數(shù)資料
型號(hào)： ST72331
廠商： 意法半導(dǎo)體
英文描述： 8-Bit MCU with 8 to 16K ROM/OTP/EPROM, 256 EEPROM, 384 to 512 Bytes RAM, ADC, WDG, SCI, SPI and 2 Timers(8位微控制器(8M))
中文描述： 8位微控制器與8至16K的光碟/雙層/存儲(chǔ)器，256的EEPROM，384字節(jié)RAM為512，藝發(fā)局，水分散粒劑，脊髓損傷，SPI和2計(jì)時(shí)器（8位微控制器（8米））
文件頁數(shù)： 12/98頁
文件大?。?/td> 1123K
代理商： ST72331
12/98
ST72331
1.4 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.
For ROM devices, the option (software or hard-
ware watchdog) must be specified in the option list
provided to STMicroelectronics with the ROM
code (see ordering information). The Option Byte
is hardware programmed as the ROM content.
OPTBYTE
Bit 7:4 = Not used
Bit 3 = Reserved, must be cleared.
Bit 2 = Reserved, must be set on ST72331N devic-
es and must be cleared on ST72331J 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
74
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