參數(shù)資料
型號(hào): PIC16C710
廠商: Microchip Technology Inc.
英文描述: 8-Bit CMOS Microcontrollers with A/D Converter(每個(gè)I/O口有25mA驅(qū)動(dòng)/吸收電流,微控制器)
中文描述: 8位CMOS微控制器與A / D轉(zhuǎn)換器(每個(gè)的I / O口有25毫安驅(qū)動(dòng)/吸收電流,微控制器)
文件頁(yè)數(shù): 118/312頁(yè)
文件大?。?/td> 2320K
代理商: PIC16C710
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PIC16C7X
DS30390D-page 118
1996 Microchip Technology Inc.
13.5
A/D Operation During Sleep
Applicable Devices
710 71 711 72 73 73A 74 74A
The A/D module can operate during SLEEP mode. This
requires that the A/D clock source be set to RC
(ADCS1:ADCS0 =
11
). When the RC clock source is
selected, the A/D module waits one instruction cycle
before starting the conversion. This allows the
SLEEP
instruction to be executed, which eliminates all digital
switching noise from the conversion. When the conver-
sion is completed the GO/DONE bit will be cleared, and
the result loaded into the ADRES register. If the A/D
interrupt is enabled, the device will wake-up from
SLEEP. If the A/D interrupt is not enabled, the A/D mod-
ule will then be turned off, although the ADON bit will
remain set.
When the A/D clock source is another clock option (not
RC), a
SLEEP
instruction will cause the present conver-
sion to be aborted and the A/D module to be turned off,
though the ADON bit will remain set.
Turning off the A/D places the A/D module in its lowest
current consumption state.
13.6
A/D Accuracy/Error
Applicable Devices
710 71 711 72 73 73A 74 74A
The overall accuracy of the A/D is less than
±
1 LSb for
V
DD
= 5V
±
10% and the analog V
REF
= V
DD
. This over-
all accuracy includes offset error, full scale error, and
integral error. The A/D converter is guaranteed to be
monotonic. The resolution and accuracy may be less
when either the analog reference (V
DD
) is less than
5.0V or when the analog reference (V
REF
) is less than
V
DD
.
The maximum pin leakage current is
±
5
μ
A.
In systems where the device frequency is low, use of
the A/D RC clock is preferred. At moderate to high fre-
quencies, T
AD
should be derived from the device oscil-
lator. T
AD
must not violate the minimum and should be
8
μ
s for preferred operation. This is because T
AD
,
when derived from T
OSC
, is kept away from on-chip
phase clock transitions. This reduces, to a large extent,
the effects of digital switching noise. This is not possi-
ble with the RC derived clock. The loss of accuracy due
to digital switching noise can be significant if many I/O
pins are active.
In systems where the device will enter SLEEP mode
after the start of the A/D conversion, the RC clock
source selection is required. In this mode, the digital
noise from the modules in SLEEP are stopped. This
method gives high accuracy.
Note:
For the A/D module to operate in SLEEP,
the A/D clock source must be set to RC
(ADCS1:ADCS0 =
11
). To perform an A/D
conversion in SLEEP, the GO/DONE bit
must be set, followed by the
SLEEP
instruc-
tion.
13.7
Effects of a RESET
Applicable Devices
710 71 711 72 73 73A 74 74A
A device reset forces all registers to their reset state.
This forces the A/D module to be turned off, and any
conversion is aborted. The value that is in the ADRES
register is not modified for a Power-on Reset. The
ADRES register will contain unknown data after a
Power-on Reset.
13.8
Use of the CCP Trigger
Applicable Devices
710 71 711 72 73 73A 74 74A
An A/D conversion can be started by the “special event
trigger” of the CCP2 module (CCP1 on the PIC16C72
only). This requires that the CCP2M3:CCP2M0 bits
(CCP2CON<3:0>) be programmed as
1011
and that
the A/D module is enabled (ADON bit is set). When the
trigger occurs, the GO/DONE bit will be set, starting the
A/D conversion, and the Timer1 counter will be reset to
zero. Timer1 is reset to automatically repeat the A/D
acquisition period with minimal software overhead
(moving the ADRES to the desired location). The
appropriate analog input channel must be selected and
the minimum acquisition done before the “special event
trigger” sets the GO/DONE bit (starts a conversion).
If the A/D module is not enabled (ADON is cleared),
then the “special event trigger” will be ignored by the
A/D module, but will still reset the Timer1 counter.
Note:
In the PIC16C72 the "special event trigger"
is implemented in the CCP1 module.
相關(guān)PDF資料
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PIC16C711(中文) 8-Bit CMOS Microcontrollers with A/D Converter(每個(gè)I/O口有25mA驅(qū)動(dòng)/吸收電流,微控制器)
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PIC16C710/JW 功能描述:8位微控制器 -MCU .875KB 36 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
PIC16C710-04/P 功能描述:8位微控制器 -MCU .875KB 36 RAM 13 I/O 4 MHz 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
PIC16C710-04/P 制造商:Microchip Technology Inc 功能描述:IC 8BIT CMOS MCU 16C710 DIP18
PIC16C710-04/SO 功能描述:8位微控制器 -MCU .875KB 36 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
PIC16C710-04/SO 制造商:Microchip Technology Inc 功能描述:8BIT CMOS MCU SMD 16C710 SOIC18