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)： 89/184頁(yè)
文件大?。?/td> 2230K
代理商： PIC16C63A
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2000 Microchip Technology Inc.
DS30605C-page 89
PIC16C63A/65B/73B/74B
13.4
RESETS
13.4.1
POWER-ON RESET (POR)
A Power-on Reset pulse is generated on-chip when
V
DD
rise is detected (parameters D003 and D004, in
the range of 1.5V - 2.1V). To take advantage of the
POR, just tie the MCLR pin directly (or through a resis-
tor) to V
DD
. This will eliminate external RC components
usually needed to create a POR.
When the device starts normal operation (exits the
RESET condition), device operating parameters (volt-
age, frequency, temperature) must be met to ensure
operation. If these conditions are not met, the device
must be held in RESET until the operating conditions
are met. The device may be held in RESET by keeping
MCLR at Vss.
For additional information, refer to Application Note
AN607,
“
Power-up Trouble Shooting
.
”
13.4.2
POWER-UP TIMER (PWRT)
The Power-up Timer provides a fixed 72 ms nominal
time-out on power-up from the POR. The PWRT oper-
ates on an internal RC oscillator. The device is kept in
RESET as long as the PWRT is active. The PWRT
’
s
time delay allows V
DD
to rise to an acceptable level. A
configuration bit is provided to enable/disable the
PWRT.
The power-up time delay will vary from chip to chip, due
to V
DD
, temperature and process variation. See DC
parameters for details (T
PWRT
, parameter #33).
13.4.3
OSCILLATOR START-UP TIMER
(OST)
The Oscillator Start-up Timer provides a delay of 1024
oscillator cycles (from OSC1 input) after the PWRT
delay, if enabled. This helps to ensure that the crystal
oscillator or resonator has started and stabilized.
The OST time-out is invoked only for XT, LP and HS
modes and only on Power-on Reset or wake-up from
SLEEP.
13.4.4
BROWN-OUT RESET (BOR)
The configuration bit, BODEN, can enable or disable
the Brown-out Reset circuit. If V
DD
falls below V
BOR
(parameter D005, about 4V) for longer than T
BOR
(parameter #35, about 100
μ
S), the brown-out situation
will reset the device. If V
DD
falls below V
BOR
for less
than T
BOR
, a RESET may not occur.
Once the brown-out occurs, the device will remain in
Brown-out Reset until V
DD
rises above V
BOR
. The
Power-up Timer then keeps the device in RESET for
T
PWRT
(parameter #33, about 72mS). If V
DD
should fall
below V
BOR
during T
PWRT
, the Brown-out Reset pro-
cess will restart when V
DD
rises above V
BOR
with the
Power-up Timer Reset. The Power-up Timer is always
enabled when the Brown-out Reset circuit is enabled,
regardless of the state of the PWRT configuration bit.
13.4.5
TIME-OUT SEQUENCE
On power-up, the time-out sequence is as follows: the
PWRT delay starts (if enabled) when a POR occurs.
Then, OST starts counting 1024 oscillator cycles when
PWRT ends (LP, XT, HS). When the OST ends, the
device comes out of RESET.
If MCLR is kept low long enough, the time-outs will
expire. Bringing MCLR high will begin execution imme-
diately. This is useful for testing purposes or to synchro-
nize more than one PIC16CXX device operating in
parallel.
Table 13-5 shows the RESET conditions for the
STATUS, PCON and PC registers, while Table 13-6
shows the RESET conditions for all the registers.
13.4.6
POWER CONTROL/STATUS
REGISTER (PCON)
The Brown-out Reset Status bit, BOR, is unknown on a
POR. It must be set by the user and checked on sub-
sequent RESETS to see if bit BOR was cleared, indi-
cating a BOR occurred. The BOR bit is not predictable
if the Brown-out Reset circuitry is disabled.
The Power-on Reset Status bit, POR, is cleared on a
POR and unaffected otherwise. The user must set this
bit following a POR and check it on subsequent
RESETS to see if it has been cleared.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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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