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參數(shù)資料
| 型號： | ST72121J2T3/XXX |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PQFP44 |
| 封裝： | PLASTIC, TQFP-44 |
| 文件頁數(shù)： | 2/87頁 |
| 文件大?。?/td> | 1365K |
| 代理商： | ST72121J2T3/XXX |
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ST72121
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 ST72121N devic-
es and must be cleared on ST72121J 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
10
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| ST72121J4 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-BIT MICROCONTROLLER (MCU) WITH 8 TO 16 K ROM/OTP/EPROM. 384 TO 512 BYTES RAM. WDG. SCI. SPI & 2 TIMERS - SDIP42. TQFP44 |
| ST72124J | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY, ADC, 16-BIT TIMERS, SPI, SCI INTERFACES |
| ST72124J2 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY, ADC, 16-BIT TIMERS, SPI, SCI INTERFACES |
| ST72124J2B | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY, ADC, 16-BIT TIMERS, SPI, SCI INTERFACES |
| ST72124J2B1 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY, ADC, 16-BIT TIMERS, SPI, SCI INTERFACES |
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