參數(shù)資料
型號(hào)： PIC16C505
廠(chǎng)商： Microchip Technology Inc.
英文描述： 14-Pin, 8-Bit CMOS Microcontroller(每個(gè)I/O口有25mA驅(qū)動(dòng)/吸收電流,12個(gè)I/O口，帶WDT的微控制器)
中文描述： 14引腳，8位CMOS微控制器（每個(gè)的I / O口有25毫安驅(qū)動(dòng)/吸收電流，12個(gè)的I / O口，帶看門(mén)狗的微控制器）
文件頁(yè)數(shù)： 35/80頁(yè)
文件大?。?/td> 617K
代理商： PIC16C505
1998 Microchip Technology Inc.
Preliminary
DS40192A-page 35
PIC16C505
7.6.1
WDT PERIOD
The WDT has a nominal time-out period of 18 ms,
(with no prescaler). If a longer time-out period is
desired, a prescaler with a division ratio of up to 1:128
can be assigned to the WDT (under software control)
by writing to the OPTION register. Thus, a time-out
period of a nominal 2.3 seconds can be realized.
These periods vary with temperature, V
DD
and part-to-
part process variations (see DC specs).
Under worst case conditions (V
DD
= Min., Temperature
= Max., max. WDT prescaler), it may take several
seconds before a WDT time-out occurs.
7.6.2
WDT PROGRAMMING CONSIDERATIONS
The
CLRWDT
instruction clears the WDT and the
postscaler, if assigned to the WDT, and prevents it
from timing out and generating a device RESET.
The
SLEEP
instruction resets the WDT and the
postscaler, if assigned to the WDT. This gives the
maximum SLEEP time before a WDT wake-up reset.
FIGURE 7-12: WATCHDOG TIMER BLOCK DIAGRAM
TABLE 7-6:
SUMMARY OF REGISTERS ASSOCIATED WITH THE WATCHDOG TIMER
Address
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2 Bit 1
Bit 0
Value on
Power-On
Reset
Value on
MCLR and
WDT Reset
Value on
Wake-up on
Pin Change
N/A
OPTION
RBWU
RBPU
T0CS
T0SE
PSA
PS2
PS1
PS0
1111 1111
1111 1111
1111 1111
Legend: Shaded boxes = Not used by Watchdog Timer,
—
= unimplemented, read as '0',
u
= unchanged
1
0
1
0
From Timer0 Clock Source
(Figure 6-5)
To Timer0 (Figure 6-4)
Postscaler
WDT Enable
Configuration Bit
PSA
WDT
Time-out
PS2:PS0
PSA
MUX
8 - to - 1 MUX
M
U
X
Watchdog
Timer
Note: T0CS, T0SE, PSA, PS2:PS0
are bits in the OPTION register.
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參數(shù)描述
PIC16C505/JW 功能描述:8位微控制器 -MCU 1.5KB 72 RAM 12 I/O RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線(xiàn)寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)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
PIC16C505-04/P 功能描述:8位微控制器 -MCU 1.5KB 72 RAM 12 I/O 4MHz PDIP14 RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線(xiàn)寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)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
PIC16C505-04/P 制造商:Microchip Technology Inc 功能描述:IC 8BIT CMOS MCU (TUBE 30) 16C505 制造商:Microchip Technology Inc 功能描述:IC 8BIT CMOS MCU 16C505 DIP14
PIC16C505-04/SL 功能描述:8位微控制器 -MCU 1.5KB 72 RAM 12 I/O 4MHz SOIC14 RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線(xiàn)寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)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
PIC16C505-04/SL 制造商:Microchip Technology Inc 功能描述:8BIT CMOS MCU SMD 16C505 SOIC14
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