Datasheet 搜索 > 微控制器 > Microchip（微芯） > PIC16C74A-20I/PQ 数据手册 > PIC16C74A-20I/PQ 其他数据使用手册 3/8 页
器件3D模型￥ 114.084
PIC16C74A-20I/PQ 其他数据使用手册 - Microchip（微芯）
制造商:
Microchip（微芯）
分类:
微控制器
封装:
QFP-44
描述:
8位CMOS微控制器与A / D转换器 8-Bit CMOS Microcontrollers with A/D Converter
Pictures:
3D模型
符号图
焊盘图
引脚图
产品图
页面导航:
技术参数、封装参数在P5
导航目录
PIC16C74A-20I/PQ数据手册
Page:
of 8 Go
若手册格式错乱，请下载阅览PDF原文件
2001 Microchip Technology Inc. DS80089A-page 3
PIC16C74A
7. Module: Timer1
The Timer1 value may unexpectedly increment if
either the TMR1H, or the TMR1L register is writ-
ten. If Timer1 is ON and then turned OFF, perform-
ing any write instruction with TMR1H as the
destination, may cause TMR1L to increment.
EXAMPLE 2: TMR1L INCREMENT
(CASE 1)
EXAMPLE 3: TMR1L INCREMENT
(CASE 2)
If Timer1 is ON and then turned OFF when
TMR1H:TMR1L = xx:FF, performing any write
instruction with TMR1L as the destination may
cause TMR1H to increment.
EXAMPLE 4: TMR1H INCREMENT
Work around
To preserve Timer1 register values:
a) Read Timer1 register values into “shadow”
registers.
b) Perform any write instruction(s) on the
shadow registers.
c) Write the shadow register values back into
the Timer1 registers.
8. Module: USART
When the USART (SCI) is configured in Asynchro-
nous mode with the BRGH bit set, a high number
of receive errors may be experienced. For asyn-
chronous receive operations, it is recommended
that the USART be configured with the BRGH bit
cleared.
BSF T1CON, TMR1ON
:
BCF T1CON, TMR1ON
MOVF TMR1H, 1
TMR1 value before MOVF instruction:
TMR1H:TMR1L = 3F:00
TMR1 value after MOVF instruction:
TMR1H:TMR1L = 3F:01
BSF T1CON, TMR1ON
:
BCF T1CON, TMR1ON
MOVF TMR1H, 1
TMR1 value before MOVF instruction:
TMR1H:TMR1L = FF:FF
TMR1 value after MOVF instruction:
TMR1H:TMR1L = FF:00
BSF T1CON, TMR1ON
BCF T1CON, TMR1ON
CLRF TMR1L
TMR1 value before CLRF instruction:
TMR1H:TMR1L = FF:FF
TMR1 value after CLRF instruction:
TMR1H:TMR1L = 00:00
(TMR1IF is not set.)
器件 Datasheet 文档搜索
AiEMA 数据库涵盖高达 72,405,303 个元件的数据手册，每天更新 5,000 多个 PDF 文件
