參數(shù)資料
型號(hào)： PIC16C72-4E/SO
元件分類： 微控制器/微處理器
英文描述： 8-BIT, OTPROM, 4 MHz, RISC MICROCONTROLLER, PDSO28
封裝： 0.300 INCH, PLASTIC, SOIC-28
文件頁數(shù)： 87/125頁
文件大?。?/td> 1155K
代理商： PIC16C72-4E/SO
PIC16C72 Series
DS39016A-page 64
Preliminary
1998 Microchip Technology Inc.
10.8
Time-out Sequence
On power-up the time-out sequence is as follows: First
PWRT time-out is invoked after the POR time delay has
expired. Then OST is activated. The total time-out will
vary based on oscillator conguration and the status of
the PWRT. For example, in RC mode with the PWRT
disabled, there will be no time-out at all. Figure 10-7,
out sequences on power-up.
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
(Figure 10-9). This is useful for testing purposes or to
synchronize more than one PIC16CXXX family device
operating in parallel.
Table 10-5 shows the reset conditions for some special
function registers, while Table 10-6 shows the reset
conditions for all the registers.
10.9
Power Control/Status Register
(PCON)
The Power Control/Status Register, PCON has up to
two bits, depending upon the device.
Bit0 is Brown-out Reset Status bit, BOR. Bit BOR is
unknown on a Power-on Reset. It must then be set by
the user and checked on subsequent resets to see if bit
BOR cleared, indicating a BOR occurred. The BOR bit
is a "Don’t Care" bit and is not necessarily predictable
if the Brown-out Reset circuitry is disabled (by clearing
bit BODEN in the Conguration Word).
Bit1 is POR (Power-on Reset Status bit). It is cleared
on a Power-on Reset and unaffected otherwise. The
user must set this bit following a Power-on Reset.
TABLE 10-3
TIME-OUT IN VARIOUS SITUATIONS
TABLE 10-4
STATUS BITS AND THEIR SIGNIFICANCE
TABLE 10-5
RESET CONDITION FOR SPECIAL REGISTERS
Oscillator Congura-
tion
Power-up
Brown-out
Wake-up from
SLEEP
PWRTE = 0
PWRTE = 1
XT, HS, LP
72 ms +
1024TOSC
72 ms + 1024TOSC
1024TOSC
RC
72 ms
—
72 ms
—
POR
BOR
TO
PD
0
x
1
Power-on Reset
0
x
0
x
Illegal, TO is set on POR
0
x
0
Illegal, PD is set on POR
1
0
x
Brown-out Reset
1
0
1
WDT Reset
1
0
WDT Wake-up
1
u
MCLR Reset during normal operation
1
0
MCLR Reset during SLEEP or interrupt wake-up from SLEEP
Condition
Program
Counter
STATUS
Register
PCON
Register
Power-on Reset
000h
0001 1xxx
---- --0x
MCLR Reset during normal operation
000h
000u uuuu
---- --uu
MCLR Reset during SLEEP
000h
0001 0uuu
---- --uu
WDT Reset
000h
0000 1uuu
---- --uu
WDT Wake-up
PC + 1
uuu0 0uuu
---- --uu
Brown-out Reset
000h
0001 1uuu
---- --u0
Interrupt wake-up from SLEEP
PC + 1(1)
uuu1 0uuu
---- --uu
Legend: u = unchanged, x = unknown, - = unimplemented bit read as '0'.
Note 1:
When the wake-up is due to an interrupt and the GIE bit is set, the PC is loaded with the interrupt vector (0004h).
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PIC16C72A/JW 功能描述:8位微控制器 -MCU 3.5KB 128 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
PIC16C72A-04/SO 功能描述:8位微控制器 -MCU 3.5KB 128 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
PIC16C72A-04/SP 功能描述:8位微控制器 -MCU 3.5KB 128 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
PIC16C72A-04/SP 制造商:Microchip Technology Inc 功能描述:IC 8BIT CMOS MCU 16C72 SDIL28
PIC16C72A-04/SS 功能描述:8位微控制器 -MCU 3.5KB 128 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
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