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參數(shù)資料
| 型號(hào)： | PIC14000 |
| 廠商： | Microchip Technology Inc. |
| 英文描述： | CTV 22C 22#22D SKT RECP |
| 中文描述： | 28引腳可編程混合信號(hào)控制器 |
| 文件頁(yè)數(shù)： | 87/152頁(yè) |
| 文件大?。?/td> | 953K |
| 代理商： | PIC14000 |
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1996 Microchip Technology Inc.
Preliminary
DS40122B-page 87
PIC14000
10.8.1
SLEEP MODE
The SLEEP mode is entered by executing a
SLEEP
instruction.
If SLEEP mode is enabled, the WDT will be cleared but
keep running. The PD bit in the STATUS register is
cleared, the TO bit is set, and on-chip oscillators are
shut off, except the WDT RC oscillator, which continues
to run. The I/O ports maintain the status they had
before the SLEEP command was executed (driving
high, low, or high-impedance).
It is an option while in SLEEP mode to leave the
on-chip oscillator running. This option allows an A/D
conversion to continue while the CPU is in SLEEP
mode. The CPU clocks are stopped in this condition to
preserve power. The operation of the on-chip oscillator
during
SLEEP
is
controlled
(SLPCON<3>). Clearing this bit to ‘0’ allows the oscil-
lator to continue to run. This bit is only active in SLEEP
mode.
For lowest power consumption in this mode, all I/O pins
should be either at V
DD
or V
SS
with no external circuitry
drawing current from the I/O pin. I/O pins that are
high-impedance inputs should be pulled high or low
externally to avoid leakage currents caused by floating
inputs. The MCLR pin must be at a logic high level
(V
IH
). The contribution from any on-chip pull-up
resistors should be considered.
by
OSCOFF
10.8.2
WAKE-UP FROM SLEEP
The PIC14000 can wake up from SLEEP through one
of the following events:
1.
External reset input on MCLR pin
2.
Watchdog Timer time-out (if WDT is enabled)
3.
Interrupt from OSC1/PBTN pin
4.
RC<7:4> port change
5.
I
2
C (serial port) start/stop bit detect interrupt.
6.
Wake-up on programmable reference compara-
tor interrupt.
7.
A/D conversion complete (comparator trip) inter-
rupt.
8.
A/D timer overflow interrupt.
An external reset on MCLR pin causes a device reset.
The other wake-up events are considered a
continuation of program execution. The TO and PD bits
in the STATUS register can be used to determine the
cause of device reset. The PD bit, which is set on
power-up is cleared when SLEEP is invoked. The TO
bit is cleared if a WDT time-out occurred (and caused
a wake-up).
When the
SLEEP
instruction is being executed, the next
instruction (
PC + 1
) is pre-fetched. For the device to
wake-up through an interrupt event, the corresponding
interrupt enable bit must be set. Wake-up occurs
regardless of the state of bit GIE. If bit GIE is clear, the
device continues execution at the instruction after the
SLEEP
instruction. If bit GIE is set, the device executes
the instruction after the
SLEEP
instruction and then
branches to the interrupt address (0004h). In cases
where the execution of the instruction following SLEEP
is not desirable, the user should have a NOP after the
SLEEP
instruction.
The WDT is cleared when the device wakes-up from
sleep, regardless of the source of wake-up.
Note:
If the global interrupts are disabled (GIE is
cleared), but any interrupt source has both
its
interrupt
corresponding interrupt flag bits set, the
device will immediately wake from SLEEP.
enable
bit
and
the
10.8.3
HIBERNATE MODE
HIBERNATE mode is an extension of SLEEP mode
with the following additions.
WDT is forced off
Weak pull-ups on RC<5:0> are disabled
Some input buffers are gated-off (refer to
Section 5.0)
The HIBERNATE mode is entered by executing a
SLEEP
instruction with HIBEN (SLPCON<7>) bit set.
The PIC14000 wakes up from HIBERNATE mode via
all the same mechanisms as SLEEP mode, except for
WDT time-out. HIBERNATE mode allows power con-
sumption to be reduced to a minimum.
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|---|---|
| PIC14000/JW | 功能描述:8位微控制器 -MCU 7KB 192 RAM 20 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 |
| PIC14000-04/SO | 功能描述:8位微控制器 -MCU 7KB 192 RAM 20 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 |
| PIC14000-04/SP | 功能描述:8位微控制器 -MCU 7KB 192 RAM 20 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 |
| PIC14000-04/SP | 制造商:Microchip Technology Inc 功能描述:IC 8BIT CMOS MCU 14000 SDIL28 |
| PIC14000-04/SS | 功能描述:8位微控制器 -MCU 7KB 192 RAM 20 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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