ST72311 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
ST72311
STMicroelectronics
'ST72311' PDF : 94 Pages View PDF
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.
7
0
-
-
-
- b3 b2
- WDG
b7-4 = Not Used
b3 = Reserved, must be cleared to 0
b2 = Reserved, must be set to 1 on ST72311N de-
vices and must be cleared to 0 on ST72311J de-
vices.
b1 = Not Used
b0 = WDG Watchdog disable
If set to 1 the Watchdog is not enabled after reset
(Software Watchdog).
If set to 0 the Watchdog is enabled after reset
(Hardware Watchdog).
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