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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)： | 6/18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
6
The Multiplexer function controls the six open drain outputs, MUX_OUTx and NON_MUXED_OUT. This control is effected by the input pins
MUX_SELECT (Pin 19), MUX_OUT_LOW (Pin 26), and/or an internal register programmed via the I
2
C-bus. Upon power-up the multiplex
function is controlled by the MUX_SELECT and MUX_OUT_LOW pins. When the MUX_SELECT signal is a logic 0, the multiplexer will select
the data from the 6-bit EEPROM to drive on the MUX_OUTx and NON_MUXED_OUT pins. When the MUX_SELECT signal is a logic 1, the
multiplexer will select the MUX_INx pins to drive on the MUX_OUTx pins. The NON_MUXED_OUT output is latched from the 6-bit EEPROM on
a rising edge of the MUX_SELECT signal. This latch is transparent while the MUX_SELECT signal is a logic 0. An internal control register,
written via the I
2
C bus, can also control the multiplexer function. When this register is written, the MUX_SELECT function can change from the
external pin to an internal register. In this register a bit will act in a similar fashion to the MUX_SELECT input, i.e., a logic 1 will cause the
multiplexer to select data from the 6-bit EEPROM to drive on the MUX_OUTx and NON_MUXED_OUT pins. In this configuration, the
NON_MUXED_OUT will latch data when the PCA9558 acknowledges the I
2
C-bus. The MUX_SELECT pin will have no effect on the
MUX_OUTx or NON_MUXED_OUT while in this mode. When the MUX_OUT_LOW signal is a logic 0 and the multiplexer is configured so that
the MUX_OUTx pins are being driven by the 6-bit EEPROM, the MUX_OUTx pins will be driven to a logic 0. This information is summarized in
Table 1.
Table 1. Multiplexer function table
REG.
INPUT
OUTPUT
B1
3
B0
3
MUX_OUT_LOW
MUX_SELECT
MUX_OUTx
NON_MUXED_OUT
latched from EEPROM
1
x
0
0
1
MUX_INx inputs
x
0
0
0
0
0
x
0
1
1
MUX_INx inputs
latched from EEPROM
1
x
0
1
0
from EEPROM
from EEPROM
latched from EEPROM
2
0
1
0
x
MUX_INx inputs
1
1
0
x
0
0
0
1
1
x
MUX_INx inputs
latched from EEPROM
2
1
1
1
x
from EEPROM
from EEPROM
NOTES:
1. NON_MUXED_OUT value will be the value present in the 6-bit EEPROM at the time of the rising edge of the MUX_SELECT input.
2. NON_MUXED_OUT value will be the value present int he 6-bit EEPROM at the time of the slave ACK when bit1 has changed from 0 to 1.
3. These are the 2LSBs of the MUXCNTRL (Mux Control) Register
If the MUX_OUTx outputs are being driven by the 6-bit EEPROM and this EEPROM is programmed, the outputs will remain stable and change
to the new values after the EEPROM program cycle completes.
Examples of Read/Write for MUX control can be found in Figure 5.
S
1
0
0
1
1
1 A0
0
A
0
0
0
0
1
0
1
1
A
P
SLAVE ADDRESS
R/W
ACKNOWLEDGE
FROM SLAVE
ACKNOWLEDGE
FROM SLAVE
COMMAND BYTE
DATA BYTE
SW00635
0
0
0
0
0
0 B1 B0 A
ACKNOWLEDGE
FROM SLAVE
Figure 5. I
2
C write for MUXCNTRL register
SW00636
S
1
0
0
1
1
1 A0
0
A
0
0
0
0
1
0
1
1
A
SLAVE ADDRESS
R/W
ACKNOWLEDGE
FROM SLAVE
ACKNOWLEDGE
FROM SLAVE
COMMAND BYTE
SLAVE ADDRESS
S
ACKNOWLEDGE
FROM SLAVE
A
1
0
0
1
1
1 A0
1
P
0
0
0
0
0
0 B1 B0 NA
DATA FROM SLAVE
NO ACKNOWLEDGE
FROM MASTER
R/W
Figure 6. I
2
C read for MUXCNTRL register
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| PCA9558PW | 功能描述:接口-I/O擴(kuò)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(fēng)格:SMD/SMT 封裝 / 箱體:HVQFN-16 封裝:Reel |
| PCA9558PW,112 | 功能描述:接口-I/O擴(kuò)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(fēng)格:SMD/SMT 封裝 / 箱體:HVQFN-16 封裝:Reel |
| PCA9558PW,118 | 功能描述:接口-I/O擴(kuò)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(fēng)格:SMD/SMT 封裝 / 箱體:HVQFN-16 封裝:Reel |
| PCA9558PW-T | 功能描述:接口-I/O擴(kuò)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(fēng)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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