參數(shù)資料
型號(hào)： PIC16C63A
廠商： Microchip Technology Inc.
英文描述： 8-Bit CMOS Microcontrollers with A/D Converter(8位、帶A/D轉(zhuǎn)換器的CMOS微控制器)
中文描述： 8位CMOS微控制器與A / D轉(zhuǎn)換器（8位，帶的A / D轉(zhuǎn)換器的的CMOS微控制器）
文件頁(yè)數(shù)： 45/184頁(yè)
文件大小： 2230K
代理商： PIC16C63A
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2000 Microchip Technology Inc.
DS30605C-page 45
PIC16C63A/65B/73B/74B
7.3
Timer1 Operation in
Asynchronous Counter Mode
If control bit T1SYNC (T1CON<2>) is set, the external
clock input is not synchronized. The timer continues to
increment asynchronous to the internal phase clocks.
The timer will continue to run during SLEEP and can
generate an interrupt-on-overflow, which will wake-up
the processor. However, special precautions in soft-
ware are needed to read/write the timer (Section 7.3.1).
In Asynchronous Counter mode, Timer1 can not be
used as a time-base for capture or compare opera-
tions.
7.3.1
READING AND WRITING TIMER1 IN
ASYNCHRONOUS COUNTER
MODE
Reading TMR1H or TMR1L while the timer is running
from an external asynchronous clock will guarantee a
valid read (taken care of in hardware). However, the
user should keep in mind that reading the 16-bit timer
in two 8-bit values itself poses certain problems, since
the timer may overflow between the reads.
For writes, it is recommended that the user simply stop
the timer and write the desired values. A write conten-
tion may occur by writing to the timer registers, while
the register is incrementing. This may produce an
unpredictable value in the timer register.
Reading the 16-bit value requires some care. Exam-
ples 12-2 and 12-3 in the PICmicro
Mid-Range MCU
Family Reference Manual (DS33023) show how to
read and write Timer1 when it is running in Asynchro-
nous mode.
7.4
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 7-1 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 7-1:
CAPACITOR SELECTION FOR
THE TIMER1 OSCILLATOR
7.5
Resetting Timer1 using a CCP
Trigger Output
If the CCP1 or CCP2 module is configured in Compare
mode
to
generate
a
(CCP1M3:CCP1M0 =
1011
), this signal will reset
Timer1.
“
special
event
trigger
”
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 spe-
cial 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.
7.6
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.
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.
7.7
Timer1 Prescaler
The prescaler counter is cleared on writes to the
TMR1H or TMR1L registers.
Osc Type
LP
Freq
32 kHz
100 kHz
200 kHz
C1
33 pF
15 pF
15 pF
C2
33 pF
15 pF
15 pF
These values are for design guidance only.
Crystals Tested:
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 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 appro-
priate values of external components.
± 20 PPM
± 20 PPM
± 20 PPM
Note:
The special event triggers from the CCP1
and CCP2 modules will not set interrupt
flag bit TMR1IF (PIR1<0>).
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PIC16C63A/JW 功能描述:8位微控制器 -MCU 7KB 192 RAM 22 I/O RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
PIC16C63A-04/SO 功能描述:8位微控制器 -MCU 7KB 192 RAM 22 I/O RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
PIC16C63A-04/SO 制造商:Microchip Technology Inc 功能描述:8BIT CMOS MCU SMD 16C63 SOIC28
PIC16C63A-04/SP 功能描述:8位微控制器 -MCU 7KB 192 RAM 22 I/O RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
PIC16C63A-04/SP 制造商:Microchip Technology Inc 功能描述:IC 8BIT CMOS MCU 16C63 SDIL28
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