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參數(shù)資料
| 型號： | ST62T03C |
| 廠商： | 意法半導體 |
| 英文描述： | 8-Bit OTP MCUs with A/D Converter, Oscillator Safeguard, Safe Reset and 16 Pins(８位ＯＴＰ微處理器（８Ｍ）) |
| 中文描述： | 8位微控制器與檢察官辦公室的A / D轉(zhuǎn)換器，振蕩器保障，安全復位和16引腳（8位檢察官辦公室微處理器（8米）） |
| 文件頁數(shù)： | 24/70頁 |
| 文件大?。?/td> | 747K |
| 代理商： | ST62T03C |
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ST62T00C/T01C ST62T03C/E01C
DIGITAL WATCHDOG
(Cont’d)
3.3.1 Digital Watchdog Register (DWDR)
Address: 0D8h
—
Reset status: 1111 1110b
Read/Write
Bit 0 =
C
: Watchdog Control bit
If the hardware option is selected, this bit is forced
high and the user cannot change it (the Watchdog
is always active). When the software option is se-
lected, the Watchdog function is activated by set-
ting bit C to 1, and cannot then be disabled (save
by resetting the MCU).
When C is kept low the counter can be used as a
7-bit timer.
This bit is cleared to “0” on Reset.
Bit 1 =
SR
: Software Reset bit
This bit triggers a Reset when cleared.
When C = “0” (Watchdog disabled) it is the MSB of
the 7-bit timer.
This bit is set to “1” on Reset.
Bits 2-7 =
T5-T0
: Downcounter bits
It should be noted that the register bits are re-
versed and shifted with respect to the physical
counter: bit-7 (T0) is the LSB of the Watchdog
downcounter and bit-2 (T5) is the MSB.
These bits are set to “1” on Reset.
3.3.2 Application Notes
The Watchdog plays an important supporting role
in the high noise immunity of ST62xx devices, and
should be used wherever possible. Watchdog re-
lated options should be selected on the basis of a
trade-off between application security and STOP
mode availability.
When STOP mode is not required, hardware acti-
vation without EXTERNAL STOP MODE CON-
TROL should be preferred, as it provides maxi-
mum security, especially during power-on.
When STOP mode is required, hardware activa-
tion and EXTERNAL STOP MODE CONTROL
should be chosen. NMI should be high by default,
to allow STOP mode to be entered when the MCU
is idle.
The NMI pin can be connected to an I/O line (see
Figure 18
) to allow its state to be controlled by soft-
ware. The I/O line can then be used to keep NMI
low while Watchdog protection is required, or to
avoid noise or key bounce. When no more
processing is required, the I/O line is released and
the device placed in STOP mode for lowest power
consumption.
When software activation is selected and the
Watchdog is not activated, the downcounter may
be used as a simple 7-bit timer (remember that the
bits are in reverse order).
The software activation option should be chosen
only when the Watchdog counter is to be used as
a timer. To ensure the Watchdog has not been un-
expectedly activated, the following instructions
should be executed within the first 27 instructions:
jrr 0, WD, #+3
ldi WD, 0FDH
7
0
T0
T1
T2
T3
T4
T5
SR
C
40
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| ST62T00C | 8-Bit OTP MCUs with A/D Converter, Oscillator Safeguard, Safe Reset and 16 Pins(8位OTP微處理器（8M）) |
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| ST62E20C(中文) | 8-Bit OTP/EPROM MCUs with A/D Converter,Oscillator Safeguard, Safe Reset and 20 Pins(8位OTP/EPROM微控制器(8M)) |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| ST62T03CB6 | 功能描述:8位微控制器 -MCU OTP EPROM 1K No Intf 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 安裝風格:SMD/SMT |
| ST62T03CB6 | 制造商:STMicroelectronics 功能描述:IC 8BIT MCU OTP 1K 62T03 DIP16 |
| ST62T03CM3 | 功能描述:8位微控制器 -MCU ST6200C ST6201C ST6203C 8B MCU 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 安裝風格:SMD/SMT |
| ST62T03CM3/TR | 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 安裝風格:SMD/SMT |
| ST62T03CM6 | 功能描述:8位微控制器 -MCU OTP EPROM 1K No Intf 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 安裝風格:SMD/SMT |
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