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參數(shù)資料
| 型號： | MCP23008 |
| 廠商： | Microchip Technology Inc. |
| 英文描述： | 8-Bit I/O Expander with Serial Interface |
| 中文描述： | 8位的I / O串行接口擴展 |
| 文件頁數(shù)： | 13/40頁 |
| 文件大?。?/td> | 498K |
| 代理商： | MCP23008 |
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2005 Microchip Technology Inc.
DS21919B-page 13
MCP23008/MCP23S08
1.6.6
CONFIGURATION (IOCON)
REGISTER
The IOCON register contains several bits for
configuring the device:
The Sequential Operation (SEQOP) controls the
incrementing function of the address pointer. If
the address pointer is disabled, the address
pointer does not automatically increment after
each byte is clocked during a serial transfer. This
feature is useful when it is desired to continuously
poll (read) or modify (write) a register.
The Slew Rate (DISSLW) bit controls the slew
rate function on the SDA pin. If enabled, the SDA
slew rate will be controlled when driving from a
high to a low.
The Hardware Address Enable (HAEN) control bit
enables/disables the hardware address pins (A2,
A1) on the MCP23S08. This bit is not used on the
MCP23008. The address pins are always enabled
on the MCP23008.
The Open-Drain (ODR) control bit
enables/disables the INT pin for open-drain
configuration.
The Interrupt Polarity (INTPOL) control bit sets
the polarity of the INT pin. This bit is functional
only when the ODR bit is cleared, configuring the
INT pin as active push-pull.
REGISTER 1-6:
IOCON – I/O EXPANDER CONFIGURATION REGISTER (ADDR 0x05)
U-0
U-0
R/W-0
R/W-0
—
—
SEQOP
DISSLW
bit 7
R/W-0
HAEN
R/W-0
ODR
R/W-0
INTPOL
U-0
—
bit 0
bit 7-6
bit 5
Unimplemented:
Read as ‘
0
’.
SEQOP:
Sequential Operation mode bit.
1
= Sequential operation disabled, address pointer does not increment.
0
= Sequential operation enabled, address pointer increments.
DISSLW:
Slew Rate control bit for SDA output.
1
= Slew rate disabled.
0
= Slew rate enabled.
HAEN:
Hardware Address Enable bit (MCP23S08 only).
Address pins are always enabled on MCP23008.
1
= Enables the MCP23S08 address pins.
0
= Disables the MCP23S08 address pins.
ODR:
This bit configures the INT pin as an open-drain output.
1
= Open-drain output (overrides the INTPOL bit).
0
= Active driver output (INTPOL bit sets the polarity).
INTPOL:
This bit
sets the polarity of the INT output pin.
1
= Active-high.
0
= Active-low.
Unimplemented:
Read as ‘
0
’.
bit 4
bit 3
bit 2
bit 1
bit 0
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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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MCP23008_07 | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:8-Bit I/O Expander with Serial Interface |
| MCP23008-E/ML | 功能描述:接口-I/O擴展器 8bit Input/Output Exp I2C interface RoHS:否 制造商:NXP Semiconductors 邏輯系列: 輸入/輸出端數(shù)量: 最大工作頻率:100 kHz 工作電源電壓:1.65 V to 5.5 V 工作溫度范圍:- 40 C to + 85 C 安裝風格:SMD/SMT 封裝 / 箱體:HVQFN-16 封裝:Reel |
| MCP23008-E/P | 功能描述:接口-I/O擴展器 In/Out I2C int RoHS:否 制造商:NXP Semiconductors 邏輯系列: 輸入/輸出端數(shù)量: 最大工作頻率:100 kHz 工作電源電壓:1.65 V to 5.5 V 工作溫度范圍:- 40 C to + 85 C 安裝風格:SMD/SMT 封裝 / 箱體:HVQFN-16 封裝:Reel |
| MCP23008-E/SO | 功能描述:接口-I/O擴展器 In/Out I2C int RoHS:否 制造商:NXP Semiconductors 邏輯系列: 輸入/輸出端數(shù)量: 最大工作頻率:100 kHz 工作電源電壓:1.65 V to 5.5 V 工作溫度范圍:- 40 C to + 85 C 安裝風格:SMD/SMT 封裝 / 箱體:HVQFN-16 封裝:Reel |
| MCP23008-E/SO | 制造商:Microchip Technology Inc 功能描述:I/O Expander IC |
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