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参数资料
型号： ST72C171K2B6
厂商： STMICROELECTRONICS
元件分类： 微控制器/微处理器
英文描述： 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PDIP32
封装： SHRINK, PLASTIC, DIP-32
文件页数： 94/152页
文件大小： 2156K
代理商： ST72C171K2B6
ST72C171
46/152
OP-AMP MODULE (Cont’d)
VOLTAGE REFERENCE CONTROL REGISTER
(OAVRCR)
Read/Write
Reset value: 0000 0000 (00h)
Bit 7 = VR2E: VR2 Enable
This bit is set and reset by software. When the ref-
ererence voltage is selected (PS2[1:0] = 00 in the
OA2CR register) it connects VSSA (analog ground)
or Reference Voltage 2 (VR2) to the OA2 positive
input.
0: OA2 positive input is connected to VSSA
1: OA2 positive input is connected to VR2 voltage
value
Bit 6:4 = VR2[2:0] Voltage selection for channel 2
of the 8-step reference voltage
These bits are set and reset by software, they
specify the Reference Voltage 2 (VR2) connected
to the OA2 positive input when PS2[1:0] = 00 in
the OA2CR register..
Bit 3= VR1E VR1 Enable
This bit is set and reset by software. When the ref-
ererence voltage is selected (PS1[1:0] = 00 in the
OA1CR register) it connects VSSA (analog ground)
or Reference Voltage 1 (VR1) to the OA1 positive
input.
0: OA1 positive input is connected to VSSA
1: OA1 positive input is connected to VR1 voltage
value
Bit 2:0 - VR1[2:0] Voltage selection for channel 1
of the 8-step reference voltage
These bits are set and reset by software, they
specify the Reference Voltage 1 (VR1) connected
to the OA1 positive input when PS1[1:0] = 00 in
the OA1CR register.
Note: When both VR2E and VR1E are reset, the
8-step voltage reference cell is disabled and en-
ters low power mode.
70
VR2E
VR22
VR21
VR20
VR1E
VR12
VR11
VR10
Reference
Voltage 2
VR2E
VR22
VR21
VR20
0 (VSSA)
0
xxx
VDDA/8
1
000
2 x VDDA/8
1
001
3 x VDDA/8
1
010
4 x VDDA/8
1
011
5 x VDDA/8
1
100
6 x VDDA/8
1
101
7 x VDDA/8
1
110
VDDA
1
111
Reference
Voltage 1
VR1E
VR12
VR11
VR10
0 (VSSA)0
x
VDDA/8
100
0
2 x VDDA/8
100
1
3 x VDDA/8
101
0
4 x VDDA/8
101
1
5 x VDDA/8
110
0
6 x VDDA/8
110
1
7 x VDDA/8
111
VDDA
111
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相关代理商/技术参数
参数描述
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ST72C215G2M3 制造商:STMicroelectronics 功能描述:MCU 8-Bit ST7 CISC 8KB Flash 3.3V/5V 28-Pin SO Tube 制造商:STMicroelectronics 功能描述:MCU 8BIT ST7 CISC 8KB FLASH 3.3V/5V 28SOIC - Rail/Tube
ST72C215G2M5 制造商:STMicroelectronics 功能描述:MCU 8BIT ST7 CISC 8KB FLASH 3.3V/5V 28SOIC - Rail/Tube
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