參數(shù)資料
型號： PIC12HV615
廠商： Microchip Technology Inc.
英文描述： 8-Pin Flash-Based, 8-Bit CMOS Microcontrollers
中文描述： 8引腳閃存的基礎(chǔ)上，8位CMOS微控制器
文件頁數(shù)： 100/168頁
文件大?。?/td> 1347K
代理商： PIC12HV615
PIC12F609/615/12HV609/615
DS41302A-page 98
Preliminary
2006 Microchip Technology Inc.
11.3.6
TIME-OUT SEQUENCE
On power-up, the time-out sequence is as follows:
PWRT time-out is invoked after POR has expired.
OST is activated after the PWRT time-out has
expired.
The total time-out will vary based on oscillator
configuration and PWRTE bit status. For example, in EC
mode with PWRTE bit erased (PWRT disabled), there
will be no time-out at all. Figure 11-4, Figure 11-5 and
Figure 11-6 depict time-out 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 11-5). This is useful for testing purposes or
to synchronize more than one PIC12F609/615/
12HV609/615 device operating in parallel.
Table 11-6 shows the Reset conditions for some
special registers, while Table 11-5 shows the Reset
conditions for all the registers.
11.3.7
POWER CONTROL (PCON)
REGISTER
The Power Control register PCON (address 8Eh) has
two Status bits to indicate what type of Reset occurred
last.
Bit 0 is BOR (Brown-out). BOR is unknown on Power-
on Reset. It must then be set by the user and checked
on subsequent Resets to see if BOR =
0
, indicating that
a Brown-out has occurred. The BOR Status bit is a
“don’t care” and is not necessarily predictable if the
brown-out circuit is disabled (BOREN<1:0> =
00
in the
Configuration Word register).
Bit 1 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 subse-
quent Reset, if POR is ‘
0
’, it will indicate that a Power-
on Reset has occurred (i.e., V
DD
may have gone too
low).
For more information, see
Section 11.3.4 “Brown-out
Reset (BOR)”
.
TABLE 11-1:
TIME-OUT IN VARIOUS SITUATIONS
TABLE 11-2:
STATUS/PCON BITS AND THEIR SIGNIFICANCE
TABLE 11-3:
SUMMARY OF REGISTERS ASSOCIATED WITH BROWN-OUT RESET
Oscillator Configuration
Power-up
Brown-out Reset
Wake-up from
Sleep
PWRTE =
0
PWRTE =
1
PWRTE =
0
PWRTE =
1
XT, HS, LP
T
PWRT
+ 1024
T
OSC
T
PWRT
1024 T
OSC
T
PWRT
+ 1024
T
OSC
T
PWRT
1024 T
OSC
1024 T
OSC
RC, EC, INTOSC
—
—
—
POR
BOR
TO
PD
Condition
0
u
x
0
1
1
1
1
Power-on Reset
Brown-out Reset
WDT Reset
WDT Wake-up
u
u
0
u
u
u
0
0
u
u
u
u
MCLR Reset during normal operation
u
u
1
0
MCLR Reset during Sleep
Legend:
u
= unchanged,
x
= unknown
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
(1)
PCON
STATUS
Legend:
—
IRP
—
RP1
—
RP0
—
TO
—
PD
—
Z
POR
DC
BOR
C
---- --qq
---- --uu
0001 1xxx
000q quuu
u
= unchanged,
x
= unknown, – = unimplemented bit, reads as ‘
0
’,
q
= value depends on condition.
Shaded cells are not used by BOR.
Other (non Power-up) Resets include MCLR Reset and Watchdog Timer Reset during normal operation.
Note 1:
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PIC12HV615-E/MD 功能描述:8位微控制器 -MCU 2KB Flash 64 RAM 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 最大時鐘頻率:50 MHz 程序存儲器大小: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
PIC12HV615-E/MF 功能描述:8位微控制器 -MCU 1.75KB Flash 64B RAM 6 I/O 8MHz INT OSC 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 最大時鐘頻率:50 MHz 程序存儲器大小: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
PIC12HV615-E/MS 功能描述:8位微控制器 -MCU 2KB Flash 64 RAM 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 最大時鐘頻率:50 MHz 程序存儲器大小: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
PIC12HV615-E/P 功能描述:8位微控制器 -MCU 2KB Flash 64 RAM 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 最大時鐘頻率:50 MHz 程序存儲器大小: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
PIC12HV615-E/SN 功能描述:8位微控制器 -MCU 2KB Flash 64 RAM 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 最大時鐘頻率:50 MHz 程序存儲器大小: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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