參數(shù)資料
型號: ENC424J600T-I/PT
廠商: Microchip Technology
文件頁數(shù): 29/168頁
文件大?。?/td> 0K
描述: IC ETHERNET CTRLR W/SPI 44-TQFP
視頻文件: Fast 100 Mbps Ethernet PICtail Plus Overview
標準包裝: 1,200
控制器類型: 以太網(wǎng)控制器(IEEE 802.3)
接口: SPI
電源電壓: 3 V ~ 3.6 V
電流 - 電源: 96mA
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 44-TQFP
供應商設備封裝: 44-TQFP(10x10)
包裝: 帶卷 (TR)
配用: AC164132-ND - BOARD DAUGHTER PICTAIL ETHERNET
PIC18F2220/2320/4220/4320
DS39599G-page 122
2007 Microchip Technology Inc.
12.1
Timer1 Operation
Timer1 can operate in one of these modes:
As a timer
As a synchronous counter
As an asynchronous counter
The operating mode is determined by the Clock Select
bit, TMR1CS (T1CON<1>).
When TMR1CS = 0, Timer1 increments every instruc-
tion cycle. When TMR1CS = 1, Timer1 increments on
every rising edge of the external clock input, or the
Timer1 oscillator, if enabled.
When the Timer1 oscillator is enabled (T1OSCEN is
set), the RC1/T1OSI/CCP2 and RC0/T1OSO/T1CKI
pins become inputs. The TRISC1:TRISC0 values are
ignored and the pins read as ‘0’.
Timer1 also has an internal “Reset input”. This Reset
can be generated by the CCP module (see
FIGURE 12-1:
TIMER1 BLOCK DIAGRAM
FIGURE 12-2:
TIMER1 BLOCK DIAGRAM: 16-BIT READ/WRITE MODE
T1OSC
TMR1H
TMR1L
T1SYNC
TMR1CS
T1CKPS1:T1CKPS0
Peripheral Clocks
FOSC/4
Internal
Clock
TMR1ON
On/Off
Prescaler
1, 2, 4, 8
Synchronize
det
1
0
1
Synchronized
Clock Input
2
TMR1IF
Overflow
TMR1
CLR
CCP Special Event Trigger
T1OSCEN
Enable
Oscillator(1)
Interrupt
Flag bit
Note 1: When enable bit T1OSCEN is cleared, the inverter and feedback resistor are turned off. This eliminates power drain.
T1OSI
T1CKI/T1OSO
Timer 1
TMR1L
T1OSC
T1SYNC
TMR1CS
T1CKPS1:T1CKPS0
Peripheral Clocks
T1OSCEN
Enable
Oscillator(1)
TMR1IF
Overflow
Interrupt
FOSC/4
Internal
Clock
TMR1ON
on/off
Prescaler
1, 2, 4, 8
Synchronize
det
1
0
1
Synchronized
Clock Input
2
T1CKI/T1OSO
T1OSI
TMR1
Flag bit
Note 1: When enable bit T1OSCEN is cleared, the inverter and feedback resistor are turned off. This eliminates power drain.
High Byte
Data Bus<7:0>
8
TMR1H
8
Read TMR1L
Write TMR1L
CLR
CCP Special Event Trigger
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