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器件3D模型￥ 34.818
PIC18F4685-E/ML 数据手册 - Microchip（微芯）
制造商:
Microchip（微芯）
分类:
微控制器
封装:
QFN-44
描述:
PIC18 系列 3328 B RAM 96 kB 闪存 8位 微控制器 - QFN-44
Pictures:
3D模型
符号图
焊盘图
引脚图
产品图
页面导航:
引脚图在P4P5P167P169P176Hot
典型应用电路图在P193
原理图在P10P12P13P27P43P146P150P154P160P162P168P169
封装尺寸在P459
标记信息在P457P458
封装信息在P457P459P460P461P462P463
技术参数、封装参数在P432P433P434P436P437P438
应用领域在P180P272
电气规格在P107P260P261P265P266
导航目录
PIC18F4685-E/ML数据手册
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PIC18F2682/2685/4682/4685
DS39761B-page 160 Preliminary © 2007 Microchip Technology Inc.
14.1 Timer3 Operation
Timer3 can operate in one of three modes:
•Timer
• Synchronous Counter
• Asynchronous Counter
The operating mode is determined by the clock select
bit, TMR3CS (T3CON<1>). When TMR3CS is cleared
(= 0), Timer3 increments on every internal instruction
cycle (F
OSC/4). When the bit is set, Timer3 increments
on every rising edge of the Timer1 external clock input
or the Timer1 oscillator if enabled.
As with Timer1, the RC1/T1OSI and RC0/T1OSO/
T13CKI pins become inputs when the Timer1 oscillator
is enabled. This means the values of TRISC<1:0> are
ignored and the pins are read as ‘0’.
FIGURE 14-1: TIMER3 BLOCK DIAGRAM
FIGURE 14-2: TIMER3 BLOCK DIAGRAM (16-BIT READ/WRITE MODE)
T3SYNC
TMR3CS
T3CKPS1:T3CKPS0
Sleep Input
T1OSCEN
(1)
FOSC/4
Internal
Clock
1
0
2
T1OSO/T13CKI
T1OSI
1
0
TMR3ON
TMR3L
Set
TMR3IF
on Overflow
TMR3
High Byte
Timer1 Oscillator
Note 1: When enable bit, T1OSCEN, is cleared, the inverter and feedback resistor are turned off to eliminate power drain.
On/Off
Timer3
CCP1/ECCP1 Special Event Trigger
TCCPx
Clear TMR3
Prescaler
1, 2, 4, 8
Synchronize
Detect
T3SYNC
TMR3CS
T3CKPS1:T3CKPS0
Sleep Input
T1OSCEN
(1)
FOSC/4
Internal
Clock
1
0
2
T1OSO/T13CKI
T1OSI
Note 1: When enable bit, T1OSCEN, is cleared, the inverter and feedback resistor are turned off to eliminate power drain.
1
0
TMR3L
Internal Data Bus
8
Set
TMR3IF
on Overflow
TMR3
TMR3H
High Byte
8
8
8
Read TMR1L
Write TMR1L
8
TMR3ON
CCP1/ECCP1 Special Event Trigger
Timer1 Oscillator
On/Off
Timer3
Timer1 clock input
TCCPx
Clear TMR3
Prescaler
1, 2, 4, 8
Synchronize
Detect
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