参数资料
型号: ST72311N4T6/XXX
厂商: STMICROELECTRONICS
元件分类: 微控制器/微处理器
英文描述: 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PQFP64
封装: PLASTIC, TQFP-64
文件页数: 4/92页
文件大小: 624K
代理商: ST72311N4T6/XXX
12/92
ST72311
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 ST72311N devic-
es and must be cleared on ST72311J 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).
70
-
b3
b2
-
WDG
12
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