ST72331N4 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
ST72331N4
8-BIT MCU WITH 8 TO 16K OTP/EPROM, 256 EEPROM, 384 TO 512 BYTES RAM, ADC, WDG, SCI, SPI AND 2 TIMERS
STMicroelectronics
'ST72331N4' PDF : 107 Pages View PDF
ST72E331 ST72T331
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
7
-
-
-
- b3 b2
Bit 7:4 = Not used
Bit 3 = Reserved, must be cleared.
0
- WDG
Bit 2 = Reserved, must be set on ST72T331N de-
vices and must be cleared on ST72T331J 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).
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