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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： 91/152页
文件大小： 2156K
代理商： ST72C171K2B6
ST72C171
43/152
7.3.9 Register Description
OA1 CONTROL REGISTER (OA1CR)
Read/Write
Reset value: 0000 00000 (00h)
Bit 7 = AZ1 OA1 Autozero Mode.
This bit is set and reset by hardware. It enables
Autozero mode (used to measure the OA1 input
offset).
0: Autozero mode disabled
1: Autozero mode enabled
Bit 6:4 = G1[2:0] Gain Control.
These bits are set and reset by software and con-
trol the OA1 gain by modifying the resistive loop-
back network. The value of the gain is adjusted to
the desired value (for inverting / non-inverting am-
plification) corresponding to the selected positive
input source - see PS1[1:0] table, Gain Adjust col-
umn.
Bit 3:2 = PS1[1:0] Positive Input Select / Gain ad-
just
.
These bits are set and reset by software and con-
trol the OA1 positive input selection.
Bit 1:0 = NS1[1:0] Negative Input Select.
These bits are set and reset by software and con-
trol the OA1 positive input selection.
OA2 CONTROL REGISTER (OA2CR)
Read/Write
Reset value: 0000 0000 (00h)
Bit 7 = AZ2 OA2 Autozero Mode.
This bit is set and reset by hardware. It enables
Autozero mode (used to measure the OA2 input
offset).
0: Autozero mode disabled
1: Autozero mode enabled
Bit 6:4 = G2[2:0] Gain Control.
These bits are set and reset by software and con-
trol the OA2 gain by modifying the resistive loop-
back network. The value of the gain is adjusted to
the desired value (for inverting/noninverting ampli-
fication) corresponding to the selected positive in-
put source - see PS2[1:0] table, Gain Adjust col-
umn.
70
AZ1
G12
G11
G10
PS11
PS10
NS11
NS10
Gain
inv / Ninv
G12
G11
G10
-1 / 2
000
-2 / 3
001
-3 / 4
010
-4 / 5
011
-8 / 8
100
-16 / 16
1
0
1
Comparator
External Loopback
111
OA1 Positive Input
Gain
Adj.
PS11 PS10
8-step Ref.Voltage 1
inv
0
OA1PIN
ninv
0
1
Band Gap Ref. Voltage (1.2V)
inv
1
0
OA1 Negative Input
NS11
NS10
AGND
0
Floating - Repeater mode
0
1
OA1NIN
1
X
70
AZ2
G22
G21
G20
PS21
PS20
NS21
NS20
Gain
inv / Ninv
G22
G21
G20
-1 / 2
0
-2 / 3
0
1
-3 / 4
0
1
0
-4 / 5
0
1
-8 / 8
1
0
-16 / 16
1
0
1
Comparator
External Loopback
11
1
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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
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