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| 型号： | TMPSNS-RTD1 |
| 厂商： | Microchip Technology |
| 文件页数： | 19/43页 |
| 文件大小： | 0K |
| 描述： | BOARD EVAL PT100 RTD TEMP SENSOR |
| 标准包装： | 1 |
| 传感器类型： | 温度 |
| 接口： | USB |
| 嵌入式： | 是，MCU，8 位 |
| 已供物品： | 板，缆线，CD |
| 已用 IC / 零件： | MCP3301，MCP6S26，PIC18F2550 |
| 产品目录页面： | 672 (CN2011-ZH PDF) |
| 相关产品： | MCP3301T-BI/SN-ND - IC ADC 13BIT 2.7V 1CH SPI 8-SOIC MCP3301-BI/SN-ND - IC ADC 13BIT 2.7V SPI 8-SOIC MCP3301T-CI/SN-ND - IC ADC 13BIT 2.7V 1CH SPI 8-SOIC MCP3301T-BI/MS-ND - IC ADC 13BIT 2.7V 1CH SPI 8-MSOP MCP3301T-CI/MS-ND - IC ADC 13BIT 2.7V 1CH SPI 8-MSOP MCP3301-BI/P-ND - IC ADC 13BIT 2.7V SPI 8-DIP MCP3301-BI/MS-ND - IC ADC 13BIT 2.7V SPI 8-MSOP MCP3301-CI/SN-ND - IC ADC 13BIT 2.7V 1CH SPI 8SOIC MCP3301-CI/P-ND - IC ADC 13BIT 2.7V 1CH SPI 8-DIP MCP3301-CI/MS-ND - IC ADC 13BIT 2.7V 1CH SPI 8-MSOP |
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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
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
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
W-0
M1
W-0
M0
U-x
—
U-x
—
U-x
—
U-x
—
W-0
A0
bit 7
bit 0
bit 7-5
M2-M0: Command Bits
000 =
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 =
1XX =
NOP (reserved for future use) (Note 1)
NOP (reserved for future use) (Note 1)
bit 4-1
bit 0
Unimplemented: Read as ‘0’ (reserved for future use)
A0: Indirect Address Bit
1 = Addresses the Channel Register
0 = Addresses the Gain Register (Default)
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
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
? 2003 Microchip Technology Inc.
’1’ = Bit is set
’0’ = Bit is cleared
x = Bit is unknown
DS21117A-page 19
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