DSPIC30F3013-20I/ML【PDF 82/161 页】IC DSPIC MCU/DSP 24K 44QFN

收藏本站

您好，
买卖IC网欢迎您。
请登录
免费注册

买卖IC网

Sheet目录1917

78页 79页 80页 81页 [82页]83页 84页 85页 86页

2011 Microchip Technology Inc.

DS39932D-page 201

PIC18F46J11 FAMILY

13.0

TIMER1 MODULE

The Timer1 timer/counter module incorporates these

features:

Software selectable operation as a 16-bit timer or

counter

Readable and writable 8-bit registers (TMR1H

and TMR1L)

Selectable clock source (internal or external) with

device clock or Timer1 oscillator internal options

Interrupt-on-overflow

Reset on ECCP Special Event Trigger

Device clock status flag (T1RUN)

Timer with gated control

Figure 13-1 displays a simplified block diagram of the

Timer1 module.

The module incorporates its own low-power oscillator

to provide an additional clocking option. The Timer1

oscillator can also be used as a low-power clock source

for the microcontroller in power-managed operation.

Timer1 is controlled through the T1CON Control

oscillator Enable bit (T1OSCEN). Timer1 can be

enabled or disabled by setting or clearing control bit,

TMR1ON (T1CON<0>).

The FOSC clock source (TMR1CS<1:0> = 01) should

not be used with the ECCP capture/compare features.

If the timer will be used with the capture or compare

features, always select one of the other timer clocking

options.

REGISTER 13-1:

T1CON: TIMER1 CONTROL REGISTER (ACCESS FCDh)

R/W-0

TMR1CS1

TMR1CS0

T1CKPS1

T1CKPS0

T1OSCEN

T1SYNC

RD16

TMR1ON

bit 7

bit 0

Legend:

R = Readable bit

W = Writable bit

U = Unimplemented bit, read as ‘0’

-n = Value at POR

‘1’ = Bit is set

‘0’ = Bit is cleared

x = Bit is unknown

bit 7-6

TMR1CS<1:0>:

Timer1 Clock Source Select bits

= Timer1 clock source is T1OSC or T1CKI pin

= Timer1 clock source is system clock (FOSC)(1)

= Timer1 clock source is instruction clock (FOSC/4)

bit 5-4

T1CKPS<1:0>:

Timer1 Input Clock Prescale Select bits

= 1:8 Prescale value

= 1:4 Prescale value

= 1:2 Prescale value

= 1:1 Prescale value

bit 3

T1OSCEN:

Timer1 Crystal Oscillator Enable bit

= Timer1 oscillator circuit enabled

= Timer1 oscillator circuit disabled

The oscillator inverter and feedback resistor are turned off to eliminate power drain.

bit 2

T1SYNC:

Timer1 External Clock Input Synchronization Select bit

TMR1CS<1:0> = 10:

= Do not synchronize external clock input

= Synchronize external clock input

TMR1CS<1:0> = 0x:

This bit is ignored. Timer1 uses the internal clock when TMR1CS<1:0> = 0x.

bit 1

RD16:

16-Bit Read/Write Mode Enable bit

= Enables register read/write of Timer1 in one 16-bit operation

= Enables register read/write of Timer1 in two 8-bit operations

bit 0

TMR1ON:

Timer1 On bit

= Enables Timer1

=Stops Timer1

Note 1:

The FOSC clock source should not be selected if the timer will be used with the ECCP capture/compare

features.

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)

*型号	*数量	厂商	批号	封装

添加更多采购

采购需求

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

我的联系方式