參數(shù)資料
型號(hào)： PIC16C621
廠商： Microchip Technology Inc.
英文描述： EPROM-Based 8-Bit CMOS Microcontroller(每個(gè)I/O口有25mA驅(qū)動(dòng)/吸收電流,可編程參考電壓，微控制器)
中文描述： 存儲(chǔ)器為基礎(chǔ)的8位CMOS微控制器（每個(gè)的I / O口有25毫安驅(qū)動(dòng)/吸收電流，可編程參考電壓，微控制器）
文件頁(yè)數(shù)： 51/112頁(yè)
文件大?。?/td> 1205K
代理商： PIC16C621
1997 Microchip Technology Inc.
Preliminary
DS30235F-page 51
PIC16C62X(A)
9.4.5
TIME-OUT SEQUENCE
On power-up the time-out sequence is as follows: First
PWRT time-out is invoked after POR has expired. Then
OST is activated. The total time-out will vary based on
oscillator configuration and PWRTE bit status. For
example, in RC mode with PWRTE bit erased (PWRT
disabled), there will be no time-out at all. Figure 9-9,
Figure 9-10
and
Figure 9-11
sequences.
Since the time-outs occur from the POR pulse, if MCLR
is kept low long enough, the time-outs will expire. Then
bringing MCLR high will begin execution immediately
(see Figure 9-10). This is useful for testing purposes or
to synchronize more than one PIC16C62X(A) device
operating in parallel.
Table 9-5 shows the reset conditions for some special
registers, while Table 9-6 shows the reset conditions for
all the registers.
depict
time-out
9.4.6
POWER CONTROL/STATUS REGISTER
(PCON)
The power control/status register, PCON (address
8Eh) has two bits.
Bit0 is BO (Brown-out). BO is unknown on
power-on-reset. It must then be set by the user and
checked on subsequent resets to see if BO = 0
indicating that a brown-out has occurred. The BO
status bit is a don’t care and is not necessarily
predictable if the brown-out circuit is disabled (by
setting BODEN bit = 0 in the Configuration word).
Bit1 is POR (Power-on-reset). It is a ‘0’ on
power-on-reset and unaffected otherwise. The user
must write a ‘1’ to this bit following a power-on-reset.
On a subsequent reset if POR is ‘0’, it will indicate that
a power-on-reset must have occurred (V
DD
may have
gone too low).
TABLE 9-3:
TIME-OUT IN VARIOUS SITUATIONS
TABLE 9-4:
STATUS BITS AND THEIR SIGNIFICANCE
Oscillator Configuration
Power-up
Brown-out Reset
Wake-up
from SLEEP
PWRTE = 0
PWRTE = 1
XT, HS, LP
72 ms + 1024 T
OSC
1024 T
OSC
72 ms + 1024 T
OSC
1024 T
OSC
RC
72 ms
—
72 ms
—
POR
BOR
TO
PD
0
X
1
1
Power-on-reset
0
X
0
X
Illegal, TO is set on POR
0
X
X
0
Illegal, PD is set on POR
1
0
X
X
Brown-out Reset
1
1
0
1
WDT Reset
1
1
0
0
WDT Wake-up
1
1
u
u
MCLR reset during normal operation
1
1
1
0
MCLR reset during SLEEP
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PIC16C621/JW 功能描述:8位微控制器 -MCU 1.75KB 80 RAM 13 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
PIC16C621-04/P 功能描述:8位微控制器 -MCU 1.75KB 80 RAM 13 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
PIC16C621-04/P 制造商:Microchip Technology Inc 功能描述:IC 8BIT CMOS MCU 16C621 DIP18
PIC16C621-04/SO 功能描述:8位微控制器 -MCU 1.75KB 80 RAM 13 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
PIC16C621-04/SS 功能描述:8位微控制器 -MCU 1.75KB 80 RAM 13 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
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