參數(shù)資料
型號： PIC16C712-04/P
廠商： Microchip Technology
文件頁數(shù)： 34/106頁
文件大?。?/td> 0K
描述： IC MCU OTP 1KX14 A/D PWM 18DIP
產(chǎn)品培訓(xùn)模塊： Asynchronous Stimulus
標(biāo)準(zhǔn)包裝： 25
系列： PIC® 16C
核心處理器： PIC
芯體尺寸： 8-位
速度： 4MHz
外圍設(shè)備： 欠壓檢測/復(fù)位，POR，PWM，WDT
輸入/輸出數(shù)： 13
程序存儲器容量： 1.75KB（1K x 14）
程序存儲器類型： OTP
RAM 容量： 128 x 8
電壓 - 電源 (Vcc/Vdd)： 4 V ~ 5.5 V
數(shù)據(jù)轉(zhuǎn)換器： A/D 4x8b
振蕩器型： 外部
工作溫度： 0°C ~ 70°C
封裝/外殼： 18-DIP（0.300"，7.62mm）
包裝： 管件
2005 Microchip Technology Inc.
DS41106B-page 31
PIC16C712/716
5.0
TIMER1 MODULE
The Timer1 module timer/counter has the following
features:
16-bit timer/counter
(Two 8-bit registers; TMR1H and TMR1L)
Readable and writable (Both registers)
Internal or external clock select
Interrupt on overflow from FFFFh to 0000h
Reset from CCP module trigger
Timer1 has a control register, shown in Figure 5-1.
Timer1 can be enabled/disabled by setting/clearing
control bit TMR1ON (T1CON<0>).
Figure 5-2 is a simplified block diagram of the Timer1
module.
Additional information on timer modules is available in
the
PICmicro
Mid-Range
Reference
Manual,
(DS33023).
5.1
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>).
In timer mode, Timer1 increments every instruction
cycle.
In counter mode, it increments on every rising
edge of the external clock input.
When the Timer1 oscillator is enabled (T1OSCEN is
set), the RB2/T1OSI and RB1/T1OSO/T1CKI pins
become inputs. That is, the TRISB<2:1> value is
ignored.
Timer1 also has an internal “Reset input”. This Reset
can be generated by the CCP module (see Section 7.0
FIGURE 5-1:
T1CON: TIMER1 CONTROL REGISTER (ADDRESS 10h)
U-0
R/W-0
—
T1CKPS1 T1CKPS0 T1OSCEN
T1SYNC
TMR1CS TMR1ON
R
= Readable bit
W = Writable bit
U
= Unimplemented bit,
read as ‘0’
-n = Value at POR Reset
bit7
bit0
bit 7-6:
Unimplemented: Read as ‘0’
bit 5-4: T1CKPS1:T1CKPS0: Timer1 Input Clock Prescale Select bits
11
= 1:8 Prescale value
10
= 1:4 Prescale value
01
= 1:2 Prescale value
00
= 1:1 Prescale value
bit 3:
T1OSCEN: Timer1 Oscillator Enable Control bit
1
= Oscillator is enabled
0
= Oscillator is shut off
Note: The oscillator inverter and feedback resistor are turned off to eliminate power drain
bit 2:
T1SYNC: Timer1 External Clock Input Synchronization Control bit
TMR1CS = 1
1
= Do not synchronize external clock input
0
= Synchronize external clock input
TMR1CS = 0
This bit is ignored. Timer1 uses the internal clock when TMR1CS = 0.
bit 1:
TMR1CS: Timer1 Clock Source Select bit
1
= External clock from pin RB1/T1OSO/T1CKI (on the rising edge)
0
= Internal clock (FOSC/4)
bit 0:
TMR1ON: Timer1 On bit
1
= Enables Timer1
0
= Stops Timer1
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