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| 型号： | PIC16LC716-04/SS |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, OTPROM, 4 MHz, RISC MICROCONTROLLER, PDSO20 |
| 封装： | 0.209 INCH, PLASTIC, MO-150, SSOP-20 |
| 文件页数： | 37/106页 |
| 文件大小： | 1718K |
| 代理商： | PIC16LC716-04/SS |
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PIC16C712/716
DS41106B-page 34
2005 Microchip Technology Inc.
5.3
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
a 32 kHz crystal. Table 5-2 shows the capacitor
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.
TABLE 5-2:
CAPACITOR SELECTION FOR
THE TIMER1 OSCILLATOR
5.4
Timer1 Interrupt
The TMR1 Register pair (TMR1H:TMR1L) increments
from 0000h to FFFFh and rolls over to 0000h. The
TMR1 interrupt, if enabled, is generated on overflow
which is latched in interrupt flag bit TMR1IF (PIR1<0>).
This interrupt can be enabled/disabled by setting/clear-
ing TMR1 interrupt enable bit TMR1IE (PIE1<0>).
5.5
Resetting Timer1 using a CCP
Trigger Output
If the CCP module is configured in Compare mode to
generate a “Special Event Trigger” (CCP1M3:CCP1M0
= 1011), this signal will reset Timer1 and start an A/D
conversion (if the A/D module is enabled).
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, the write will take
precedence.
In this mode of operation, the CCPR1H:CCPR1L
registers pair effectively becomes the period register
for Timer1.
TABLE 5-3:
REGISTERS ASSOCIATED WITH TIMER1 AS A TIMER/COUNTER
Osc Type
Freq.
C1
C2
LP
32 kHz
33 pF
100 kHz
15 pF
200 kHz
15 pF
These values are for design guidance only.
Note 1: Higher capacitance increases the stability of
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 components.
Note:
The Special Event Triggers from the
CCP1 module will not set interrupt flag bit
TMR1IF (PIR1<0>).
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
INTCON
GIE
PEIE
T0IE
INTE
RBIE
T0IF
INTF
RBIF
0000 000x
0000 000u
0Ch
PIR1
—
ADIF
—
CCP1IF
TMR2IF
TMR1IF
-0-- -000
8Ch
PIE1
—
ADIE
—
CCP1IE
TMR2IE
TMR1IE
-0-- -000
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
07h
DATACC
P
—
DCCP
—DT1CK
---- -x-x
---- -u-u
87h
TRISCCP
—
TCCP
—TT1CK
---- -1-1
Legend: x = unknown, u = unchanged, — = unimplemented read as ‘0’. Shaded cells are not used by the Timer1 module.
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| PIC16LC716T-04/SO | 功能描述:8位微控制器 -MCU 3.5KB 128 RAM 13 I/O RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT |
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