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參數(shù)資料
| 型號： | PCA9558 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | 8-bit I2C and SMBus I/O port with 5-bit multiplexed/1-bit latched 6-bit I2C EEPROM and 2 k bit EEPROM |
| 中文描述： | 8位I2C和SMBus I / O與5位multiplexed/1-bit端口鎖存6位I2C EEPROM及2度位EEPROM |
| 文件頁數(shù)： | 7/18頁 |
| 文件大?。?/td> | 131K |
| 代理商： | PCA9558 |
Philips Semiconductors
8-bit I
2
C and SMBus I/O port with 5-bit multiplexed/1-bit
latched 6-bit I
2
C EEPROM and 2 k bit EEPROM
Product data
PCA9558
2002 May 24
7
The GPIOs are controlled by a set of 4 internal registers: Input Port Register (IPR); Output Port Register (OPR); Polarity Inversion Register
(PIR); and the Input/Output Configuration Register (IOCR). Each register is read/write via the I
2
C-bus or 256 byte EEPROM, with the exception
of the IPR, which is read only, one at a time. The read/write takes place on the slave ACKNOWLEDGE. The control of which register is currently
available to the I
2
C-bus is set by bits in the control register. See Tables 2 through 5 for details.
Table 2. Input Port Register (IPR)
Bit
I7
I6
I5
I4
I3
I2
I1
I0
Default
0
0
0
0
0
0
0
0
This register is an input-only port. It reflects the logic value present
on the GPIO pins regardless of whether they are configured as
inputs or outputs (IOCR). Writes to this register have no effect.
Table 3. Output Port Register (OPR)
Bit
O7
O6
O5
O4
O3
O2
O1
O0
Default
0
0
0
0
0
0
0
0
This register is an output-only port. It reflects the outgoing logic
levels of the GPIO defined as outputs in the IOCR. Bit values in this
register have no effect on GPIO defined as inputs. In turn, reads
from this register reflect the value stored in the flip-flop controlling
the output,
not
the actual output value.
Table 4. Polarity Inversion Register (PIR)
Bit
P7
P6
P5
P4
P3
P2
P1
P0
Default
1
1
1
1
0
0
0
0
This register enables polarity inversion of GPIO defined as inputs by
the IOCR. If a bit in this register is set to a logic 1, the corresponding
GPIO input port is inverted. If a bit in this register is set to a logic 0,
the corresponding GPIO input port is not inverted.
Table 5. I/O Configuration Register (IOCR)
Bit
C7
C6
C5
C4
C3
C2
C1
C0
Default
0
0
0
0
0
0
0
0
This register configures the direction of the GPIO pins. If a bit is set
to a logic 1, the corresponding port pin is enabled as an input with a
high impedance output driver. If a bit is set to a logic 0, the
corresponding port pin is enabled as an output.
Examples of Read/Write to these registers can be found in
Figures 7, 8, 13, and 14.
The I/O_OUT_LOW input, when held LOW longer than the time t
W
,
will reset the GPIO registers to their default (power-up) values.
A read of the present value of the inputs MUX_INx can be done via
the I
2
C. This is done by addressing the PCA9558 in a write mode
and entering the correct command code. The preset value on the
MUX_INx inputs is latched at the command code ACKNOWLEDGE.
A REPEATED START is then sent with the R/W bit set to a logic 1,
read, and this latched data is read out on the I
2
C-bus. See Figure 9.
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| PCA9558PW | 功能描述:接口-I/O擴展器 5BIT MP/1-BITL 6BIT I2C EEPROM 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 |
| PCA9558PW,112 | 功能描述:接口-I/O擴展器 5BIT MP/1-BITL 6BIT 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 |
| PCA9558PW,118 | 功能描述:接口-I/O擴展器 5BIT MP/1-BITL 6BIT 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 |
| PCA9558PW-T | 功能描述:接口-I/O擴展器 5BIT MP/1-BITL 6BIT I2C EEPROM 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 |
| PCA9559 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:5-bit multiplexed/1-bit latched 6-bit I2C EEPROM |
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