參數(shù)資料
型號： ST7FLCD1
廠商： 意法半導(dǎo)體
英文描述： 8-bit MCU for LCD Monitors with 60 KBytes Flash, 2 KBytes RAM, 2 DDC Ports and Infrared Controller
中文描述： 8位微控制器的液晶顯示器為60千字節(jié)閃存，2千字節(jié)RAM，2個DDC的港口和紅外線控制器
文件頁數(shù)： 76/95頁
文件大?。?/td> 633K
代理商： ST7FLCD1
Watchdog Timer (WDG)
ST7FLCD1
76/95
The T6 bit can be used to generate a software reset (the WDGA bit is set and the T6 bit is cleared).
The application program must write in the CR register at regular intervals during normal operation to
prevent an MCU reset. The value to be stored in the CR register must be between FFh and C0h
(see
Table 25)
.
12.4
Lock-up Counter
An 8-bit counter starts after a reset or by writing to the CR register. It disables the writing of the CR
register during the next 256 cycles of CPU clock (typical value of 32 μs at 8 MHz). If a writing order
takes place during this time, this 8-bit counter is reset but not the main watchdog downcounter (no
writing to the CR register occurs).
Thus after several too close writings of the CR register, the main downcounter reaches the reset
value and a reset occurs. If the CR register is normally refreshed every 32 μs or more, write
commands are always enabled.
12.5
Interrupts
None.
12.6
Register Description
WDG CONTROL REGISTER (WDGCR)
Read/Write
Reset Value: 2 1111 (7Fh)
Bit 7 = WDGA
Activation bit
.
This bit is set by software and only cleared by hardware after a reset. When WDGA = 1, the
watchdog can generate a reset.
0
Watchdog disabled
1
Watchdog enabled
Bits [6:0] = T[6:0]
7-bit Timer (MSB to LSB).
These bits contain the decremented value. A reset is produced when it rolls over from 40h to 3Fh
(T6 is cleared).
Table 25: Watchdog Timing (f
CPU
= 8 MHz)
CR Register Initial Value
WDG Timeout (ms)
Lock-up Timeout (μs)
Maximum
Minimum
FFh
C0h
400
6.250
32
Table 26: Watchdog Register Map
Address
Reset
Register
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
001Bh
7F
R/W
WDGCR
WDGA
T[6:0]
7
6
5
4
3
2
1
0
WDGA
T6
T5
T4
T3
T2
T1
T0
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參數(shù)描述
ST7FLCD1_05 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:8-bit MCU for LCD Monitors with 60 KBytes Flash,2 KBytes RAM, 2 DDC Ports and Infrared Controller
ST7FLI15BF1U6 功能描述:8位微控制器 -MCU 8-Bit MCU w/ Single Volt Flash RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
ST7FLI15BF1U6TR 功能描述:8位微控制器 -MCU 8 BITS MICROCONTR RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
ST7FLI19BF1M3TR 功能描述:8位微控制器 -MCU 8 BITS MICROCONTR RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
ST7FLI19BF1U6TR 功能描述:8位微控制器 -MCU 8-Bit MCU w/ Single Volt Flash RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
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