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: 92/152页
文件大小: 2156K
代理商: ST72C171K2B6
ST72C171
44/152
OP-AMP MODULE (Cont’d)
Bit 3:2 = PS2[1:0] Positive Input Select / Gain ad-
just.
These bits are set and reset by software and con-
trol the OA2 positive input selection.t
Bit 1:0 = NS2[1:0] Negative Input Select.
These bits are set and reset by software and con-
trol the OA2 negative input selection.
OA3 CONTROL REGISTER
(OA3CR)
Read/Write
Reset value: 0000 0000 (00h)
Bit 7 = OA3ON OA3 on/off (low power)
Stand Alone Op-Amp on/off control bit, it is set and
reset by software. It reduces power consumption
when reset.
0: Op-amp 3 off
1: Op-amp 3 on
Note: This bit must be kept cleared in devices
without OA3 (refer to device block diagram and pin
description)
Bit 6:0 = Reserved.
OA2 Positive Input
Gain
Adj.
PS21 PS20
8-step Ref.Voltage 1
inv
0
OA2PIN
ninv
0
1
Band Gap Ref. Voltage (1.2V)
inv
1
0
Floating
ninv
1
OA2 Negative Input
NS21
NS20
AGND
0
Floating -Repeater mode
0
1
OA2NIN
1
X
70
OA3ON
-
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