參數(shù)資料
型號(hào): PIC16CR76T-I/SS
廠商: Microchip Technology
文件頁(yè)數(shù): 121/172頁(yè)
文件大?。?/td> 0K
描述: IC PIC MCU 8KX14 28SSOP
標(biāo)準(zhǔn)包裝: 2,100
系列: PIC® 16C
核心處理器: PIC
芯體尺寸: 8-位
速度: 20MHz
連通性: I²C,SPI,UART/USART
外圍設(shè)備: 欠壓檢測(cè)/復(fù)位,POR,PWM,WDT
輸入/輸出數(shù): 22
程序存儲(chǔ)器容量: 14KB(8K x 14)
程序存儲(chǔ)器類(lèi)型: ROM
RAM 容量: 368 x 8
電壓 - 電源 (Vcc/Vdd): 2 V ~ 5.5 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 5x8b
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 85°C
封裝/外殼: 28-SSOP(0.209",5.30mm 寬)
包裝: 帶卷 (TR)
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PIC16CR7X
DS21993C-page 50
2007 Microchip Technology Inc.
6.5
Timer1 Oscillator
A crystal oscillator circuit is built-in between pins T1OSI
(input) and T1OSO (amplifier output). It is enabled by
setting control bit T1OSCEN (T1CON<3>). The oscilla-
tor is a low-power oscillator rated up to 200 kHz. It will
continue to run during Sleep. It is primarily intended for
use with a 32 kHz crystal. Table 6-1 shows the capaci-
tor selection for the Timer1 oscillator.
The Timer1 oscillator is identical to the LP oscillator.
The user must provide a software time delay to ensure
proper oscillator start-up.
6.6
Resetting Timer1 using a CCP
Trigger Output
If the CCP1 or CCP2 module is configured in Compare
mode
to
generate
a
“special
event
trigger”
(CCP1M3:CCP1M0 = 1011), this signal will reset
Timer1.
Timer1 must be configured for either Timer or Synchro-
nized Counter mode, to take advantage of this feature.
If Timer1 is running in Asynchronous Counter mode,
this Reset operation may not work.
In the event that a write to Timer1 coincides with a
special event trigger from CCP1 or CCP2, the write will
take precedence.
In this mode of operation, the CCPRxH:CCPRxL regis-
ter pair effectively becomes the period register for
Timer1.
6.7
Resetting of Timer1 Register Pair
(TMR1H, TMR1L)
TMR1H and TMR1L registers are not reset to 00h on a
POR, or any other Reset, except by the CCP1 and
CCP2 special event triggers.
TABLE 6-1:
CAPACITOR SELECTION FOR
THE TIMER1 OSCILLATOR
T1CON register is reset to 00h on a Power-on Reset or
a Brown-out Reset, which shuts off the timer and
leaves a 1:1 prescale. In all other Resets, the register
is unaffected.
6.8
Timer1 Prescaler
The prescaler counter is cleared on writes to the
TMR1H or TMR1L registers.
TABLE 6-2:
REGISTERS ASSOCIATED WITH TIMER1 AS A TIMER/COUNTER
Note:
The special event triggers from the CCP1
and CCP2 modules will not set interrupt
flag bit TMR1IF (PIR1<0>).
Osc Type
Frequency
Capacitors Used:
OSC1
OSC2
LP
32 kHz
47 pF
100 kHz
33 pF
200 kHz
15 pF
Capacitor values are for design guidance only.
These capacitors were tested with the crystals listed
below for basic start-up and operation. These values
were not optimized.
Different capacitor values may be required to produce
acceptable oscillator operation. The user should test
the performance of the oscillator over the expected
VDD and temperature range for the application.
See the notes (below) table for additional information.
Commonly Used Crystals:
32.768 kHz
Epson C-001R32.768K-A
100 kHz
Epson C-2 100.00 KC-P
200 kHz
STD XTL 200.000 kHz
Note 1:
Higher capacitance increases the stability
of the oscillator, but also increases the
start-up time.
2:
Since each resonator/crystal has its own
characteristics, the user should consult
the resonator/crystal manufacturer for
appropriate values of external compo-
nents.
Address
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Value on
POR,
BOR
Value on
all other
Resets
0Bh,8Bh,
10Bh,18Bh
INTCON
GIE
PEIE
TMR0IE
INTE
RBIE
TMR0IF
INTF
RBIF
0000 000x
0000 000u
0Ch
PIR1
PSPIF(1)
ADIF
RCIF
TXIF
SSPIF
CCP1IF
TMR2IF
TMR1IF
0000 0000
8Ch
PIE1
PSPIE(1)
ADIE
RCIE
TXIE
SSPIE
CCP1IE
TMR2IE
TMR1IE
0000 0000
0Eh
TMR1L
Holding Register for the Least Significant Byte of the 16-bit TMR1 Register
xxxx xxxx
uuuu uuuu
0Fh
TMR1H
Holding Register for the Most Significant Byte of the 16-bit TMR1 Register
xxxx xxxx
uuuu uuuu
10h
T1CON
T1CKPS1
T1CKPS0
T1OSCEN
T1SYNC
TMR1CS
TMR1ON
--00 0000
--uu uuuu
Legend:
x
= unknown, u = unchanged, – = unimplemented, read as ‘0’. Shaded cells are not used by the Timer1 module.
Note
1:
Bits PSPIE and PSPIF are reserved on the PIC16CR73/76; always maintain these bits clear.
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