收藏本站
参数资料
型号： PIC16LC554-04E/P
厂商： Microchip Technology
文件页数： 49/108页
文件大小： 0K
描述： IC MCU OTP 512X14 18DIP
标准包装： 25
系列： PIC® 16C
核心处理器： PIC
芯体尺寸： 8-位
速度： 4MHz
外围设备： POR，WDT
输入/输出数： 13
程序存储器容量： 896B（512 x 14）
程序存储器类型： OTP
RAM 容量： 80 x 8
电压 - 电源 (Vcc/Vdd)： 2.5 V ~ 5.5 V
振荡器型： 外部
工作温度： -40°C ~ 125°C
封装/外壳： 18-DIP（0.300"，7.62mm）
包装： 管件
2002 Microchip Technology Inc.
Preliminary
DS40143D-page 43
PIC16C55X
6.6
Context Saving During Interrupts
During an interrupt, only the return PC value is saved
on the stack. Typically, users may wish to save key reg-
isters during an interrupt (e.g., W register and STATUS
register). This will have to be implemented in software.
Example 6-1 stores and restores the STATUS and W
registers. The user register,
W_TEMP, must be defined
in both banks and must be defined at the same offset
from the bank base address (i.e.,
W_TEMP is defined at
0x20 in Bank 0 and it must also be defined at 0xA0 in
Bank 1). The user register,
STATUS_TEMP, must be
defined in Bank 0. The Example 6-1:
Stores the W register
Stores the STATUS register in Bank 0
Executes the ISR code
Restores the STATUS (and bank select bit
register)
Restores the W register
EXAMPLE 6-1:
SAVING THE STATUS
AND W REGISTERS IN
RAM
6.7
Watchdog Timer (WDT)
The Watchdog Timer is a free running on-chip RC oscil-
lator which does not require any external components.
This RC oscillator is separate from the RC oscillator of
the CLKIN pin. That means that the WDT will run, even
if the clock on the OSC1 and OSC2 pins of the device
has been stopped, for example, by execution of a
SLEEP
instruction. During normal operation, a WDT
timeout generates a device RESET. If the device is in
SLEEP mode, a WDT timeout causes the device to
wake-up and continue with normal operation. The WDT
can be permanently disabled by programming the con-
figuration bit WDTE as clear (Section 6.1).
6.7.1
WDT PERIOD
The WDT has a nominal timeout period of 18 ms, (with
no prescaler). The timeout periods vary with tempera-
ture, V
DD and process variations from part-to-part (see
DC specs). If longer timeout periods are 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, timeout periods up to 2.3
seconds can be realized.
The CLRWDT and SLEEP instructions clear the WDT
and the postscaler, if assigned to the WDT, and prevent
it from timing out and generating a device RESET.
The TO bit in the STATUS register will be cleared upon
a Watchdog Timer timeout.
6.7.2
WDT PROGRAMMING
CONSIDERATIONS
It should also be taken in account that under worst case
conditions (V
DD = Min., Temperature = Max., max.
WDT prescaler) it may take several seconds before a
WDT timeout occurs.
MOVWF
W_TEMP
;copy W to TEMP
;register, could be in
;either bank
SWAPF
STATUS,W
;swap STATUS to be
;saved into W
BCF
STATUS,RP0
;change to bank0
;regardless of
;current bank
MOVWF
STATUS_TEMP
;save STATUS to bank0
;register
:
SWAPF
STATUS_TEMP,W ;swap STATUS_TEMP
;register into W, sets
;bank to original state
MOVWF
STATUS
;move W into STATUS
;register
SWAPF
W_TEMP,F
;swap W_TEMP
SWAPF
W_TEMP,W
;swap W_TEMP into W
相关PDF资料
PDF描述
PIC16LC54CT-04/SS IC MCU OTP 512X12 20SSOP
PIC16LC54CT-04/SO IC MCU OTP 512X12 18SOIC
PIC16LC54CT-04I/SS IC MCU OTP 512X12 20SSOP
PIC16LC54CT-04I/SO IC MCU OTP 512X12 18SOIC
PIC16LC54AT-04/SO IC MCU OTP 512X12 18SOIC
相关代理商/技术参数
参数描述
PIC16LC554-04I/P 功能描述:8位微控制器 -MCU .875KB 80 RAM 13 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
PIC16LC554-04I/SO 功能描述:8位微控制器 -MCU .875KB 80 RAM 13 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
PIC16LC554-04I/SS 功能描述:8位微控制器 -MCU .875KB 80 RAM 13 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
PIC16LC554T-04/SO 功能描述:8位微控制器 -MCU .875KB 80 RAM 13 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
PIC16LC554T-04/SS 功能描述:8位微控制器 -MCU .875KB 80 RAM 13 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
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*