參數(shù)資料
型號： MCP6S22
廠商： Microchip Technology Inc.
英文描述： Single-Ended, Rail-to-Rail I/O, Low Gain PGA
中文描述： 單端，軌至軌I / O，低增益美國PGA
文件頁數(shù)： 19/43頁
文件大小： 880K
代理商： MCP6S22
2003 Microchip Technology Inc.
DS21117A-page 19
MCP6S21/2/6/8
5.2
Registers
The analog functions are programmed through the SPI
interface using 16-bit words (see Figure 5-1 and
Figure 5-2). This data is sent to two of three 8-bit regis-
ters: Instruction Register (Register 5-1), Gain Register
(Register 5-2) and Channel Register (Register 5-3).
The power-up defaults for these three registers are:
Instruction Register: 000x xxx0
Gain Register: xxxx x000
Channel Register: xxxx x000
Thus, these devices are initially programmed with the
Instruction Register set for
NOP
(no operation), a gain
of +1 V/V and CH0 as the input channel.
5.2.1
INSTRUCTION REGISTER
The Instruction Register has 3 command bits and 1
indirect address bit; see Register 5-1. The command
bits include a
NOP
(
000
) to support daisy chaining (see
Section 5.3, “Registers”); the other
NOP
commands
shown should not be used (they are reserved for future
use). The device is brought out of Shutdown mode
when a valid command, other than
NOP
or Shutdown, is
sent and CS is raised.
REGISTER 5-1:
INSTRUCTION REGISTER
W-0
M2
bit 7
W-0
M1
W-0
M0
U-x
—
U-x
—
U-x
—
U-x
—
W-0
A0
bit 0
bit 7-5
M2-M0: Command Bits
000
=
NOP
(Default)
(Note 1)
001
=
PGA enters Shutdown Mode as soon as a full 16-bit word is sent and CS is raised.
(Notes 1 and 2)
010
=
Write to register.
011
=
NOP
(reserved for future use)
(Note 1)
1XX
=
NOP
(reserved for future use)
(Note 1)
Unimplemented:
Read as ‘0’ (reserved for future use)
A0: Indirect Address Bit
1
= Addresses the Channel Register
0
= Addresses the Gain Register (Default)
bit 4-1
bit 0
Note 1:
All other bits in the 16-bit word (including A0) are “don’t cares”.
2:
The device exits Shutdown mode when a valid command (other than
NOP
or Shut-
down) is sent and CS is raised; that valid command will be executed. Shutdown
does not toggle.
Legend:
R = Readable bit
-n = Value at POR
W = Writable bit
’1’ = Bit is set
U = Unimplemented bit, read as ‘0’
’0’ = Bit is cleared
x = Bit is unknown
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MCP6S22-I/P 功能描述:特殊用途放大器 2-Chan. 12 MHz SPI RoHS:否 制造商:Texas Instruments 通道數(shù)量:Single 共模抑制比（最小值）: 輸入補(bǔ)償電壓: 工作電源電壓:3 V to 5.5 V 電源電流:5 mA 最大功率耗散: 最大工作溫度:+ 70 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-20 封裝:Reel
MCP6S22-I/SN 功能描述:特殊用途放大器 2-Chan. 12 MHz SPI RoHS:否 制造商:Texas Instruments 通道數(shù)量:Single 共模抑制比（最小值）: 輸入補(bǔ)償電壓: 工作電源電壓:3 V to 5.5 V 電源電流:5 mA 最大功率耗散: 最大工作溫度:+ 70 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-20 封裝:Reel
MCP6S22T-I/MS 功能描述:特殊用途放大器 2-Chan. 12 MHz SPI RoHS:否 制造商:Texas Instruments 通道數(shù)量:Single 共模抑制比（最小值）: 輸入補(bǔ)償電壓: 工作電源電壓:3 V to 5.5 V 電源電流:5 mA 最大功率耗散: 最大工作溫度:+ 70 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-20 封裝:Reel
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