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参数资料
型号： PIC16C64A-04I/PQ
厂商： Microchip Technology
文件页数： 65/126页
文件大小： 0K
描述： IC MCU OTP 2KX14 PWM 44-MQFP
产品培训模块： Asynchronous Stimulus
标准包装： 96
系列： PIC® 16C
核心处理器： PIC
芯体尺寸： 8-位
速度： 4MHz
连通性： I²C，SPI
外围设备： 欠压检测/复位，POR，PWM，WDT
输入/输出数： 33
程序存储器容量： 3.5KB（2K x 14）
程序存储器类型： OTP
RAM 容量： 128 x 8
电压 - 电源 (Vcc/Vdd)： 4 V ~ 6 V
振荡器型： 外部
工作温度： -40°C ~ 85°C
封装/外壳： 44-QFP
包装： 托盘
配用： 309-1002-ND - ADAPTER 44-PQFP TO 40-DIP
43
AT90S/LS4433
1042H–AVR–04/03
Watchdog Timer
The Watchdog Timer is clocked from a separate On-chip Oscillator. By controlling the
Watchdog Timer prescaler, the Watchdog Reset interval can be adjusted as shown in
Table 6. See characterization data for typical values at other V
CC levels. The WDR
(Watchdog Reset) instruction resets the Watchdog Timer. Eight different clock cycle
periods can be selected to determine the reset period. If the reset period expires without
another Watchdog Reset, the AT90S4433 resets and executes from the Reset vector.
For timing details on the Watchdog Reset, refer to page 25.
To prevent unintentional disabling of the Watchdog, a special turn-off sequence must be
followed when the Watchdog is disabled. Refer to the description of the Watchdog Timer
Control Register for details.
Figure 35. Watchdog Timer
Watchdog Timer Control
Register – WDTCR
Bits 7..5 – Res: Reserved Bits
These bits are reserved bits in the AT90S4433 and will always read as zero.
Bit 4 – WDTOE: Watchdog Turn-off Enable
This bit must be set (one) when the WDE bit is cleared. Otherwise, the Watchdog will
not be disabled. Once set, hardware will clear this bit to zero after four clock cycles.
Refer to the description of the WDE bit for a Watchdog disable procedure.
Bit 3 – WDE: Watchdog Enable
When the WDE is set (one), the Watchdog Timer is enabled; if the WDE is cleared
(zero), the Watchdog Timer function is disabled. WDE can only be cleared if the
WDTOE bit is set (one). To disable an enabled Watchdog Timer, the following proce-
dure must be followed:
1.
In the same operation, write a logical “1” to WDTOE and WDE. A logical “1” must
be written to WDE even though it is set to one before the disable operation
starts.
2.
Within the next four clock cycles, write a logical “0” to WDE. This disables the
Watchdog.
Bit
765
4
321
0
$21 ($41)
–
WDTOE
WDE
WDP2
WDP1
WDP0
WDTCR
Read/Write
R
R/W
Initial Value
0
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相关代理商/技术参数
参数描述
PIC16C64A-10/L 功能描述:8位微控制器 -MCU 3.5KB 128 RAM 33 I/O RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
PIC16C64A-10/P 功能描述:8位微控制器 -MCU 3.5KB 128 RAM 33 I/O RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
PIC16C64A-10/P 制造商:Microchip Technology Inc 功能描述:IC 8BIT CMOS MCU 16C64 DIP40
PIC16C64A-10/P 制造商:Microchip Technology Inc 功能描述:Microcontroller IC Number of I/Os:33
PIC16C64A-10/PQ 功能描述:8位微控制器 -MCU 3.5KB 128 RAM 33 I/O RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
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