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參數資料
| 型號： | MAX7312 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | 2-Wire-Interfaced 16-Bit I/O Port Expander with Interrupt and Hot-Insertion Protection |
| 中文描述： | 2線接口、16位、輸入/輸出端口擴展器，帶有中斷和熱插入保護 |
| 文件頁數： | 9/17頁 |
| 文件大小： | 373K |
| 代理商： | MAX7312 |
Eight of the MAX7312
’
s nine registers are configured to
operate as four register pairs: input ports, output ports,
polarity inversion ports, and configuration ports. After
sending 1 byte of data to one register, the next byte is
sent to the other register in the pair. For example, if the
first byte of data is sent to output port 2, then the next
byte of data is stored in output port 1. An unlimited
number of data bytes can be sent in one write transmis-
sion. This allows each 8-bit register to be updated inde-
pendently of the other registers.
Reading Port Registers
To read the device data, the bus master must first send
the MAX7312 address with the R/
W
bit set to zero, fol-
lowed by the command byte, which determines which
register is accessed. After a restart, the bus master
must then send the MAX7312 address with the R/
W
bit
set to 1. Data from the register defined by the com-
mand byte is then sent from the MAX7312 to the master
(Figures 8, 9).
M
2-Wire-Interfaced 16-Bit I/O Port Expander
with Interrupt and Hot-Insertion Protection
_______________________________________________________________________________________
9
S
0 A
A S
1 A
A
NA P
SLAVE ADDRESS
SLAVE ADDRESS
MSB
DATA
LSB
MSB
DATA
LSB
COMMAND BYTE
R/W
R/W
ACKNOWLEDGE
FROM SLAVE
ACKNOWLEDGE
FROM SLAVE
ACKNOWLEDGE
FROM SLAVE
MASTER TRANSMITTER BECOMES
MASTER RECEIVER AND SLAVE
RECEIVER BECOMES SLAVE TRANSMITTER
DATA FROM LOWER OR
UPPER BYTE OF REGISTER
DATA FROM LOWER OR
UPPER BYTE OF REGISTER
TRANSFER OF DATA CAN BE STOPPED AT ANY TIME BY A STOP CONDITION.
Figure 8. Read from Register
1
2
3
4
5
6
7
8
9
SCL
SLAVE ADDRESS
PORT 1 DATA
PORT 2 DATA
PORT 1 DATA
PORT 2 DATA
S
1
7
7
7
7
0
0
0
0
1
P
A
A
A
A
R/W
ACKNOWLEDGE
FROM SLAVE
ACKNOWLEDGE
FROM MASTER
ACKNOWLEDGE
FROM MASTER
ACKNOWLEDGE
FROM MASTER
NONACKNOWLEDGE
FROM MASTER
t
IV
t
IR
READ FROM PORT 1
READ FROM PORT 2
DATA INTO PORT 1
DATA INTO PORT 2
INT
TRANSFER OF DATA CAN BE STOPPED ANYTIME BY A STOP CONDITION. WHEN THE
STOP CONDITION OCCURS, DATA PRESENT AT THE LAST ACKNOWLEDGE PHASE IS
VALID (OUTPUT MODE) AND COMMAND BYTE HAS PREVIOUSLY BEEN SET TO REGISTER 00.
Figure 9. Read from Input Registers
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相關代理商/技術參數 |
參數描述 |
|---|---|
| MAX7312AAG | 功能描述:接口-I/O擴展器 RoHS:否 制造商:NXP Semiconductors 邏輯系列: 輸入/輸出端數量: 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 |
| MAX7312AAG+ | 功能描述:接口-I/O擴展器 16-Bit I/O Port Expander RoHS:否 制造商:NXP Semiconductors 邏輯系列: 輸入/輸出端數量: 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 |
| MAX7312AAG+T | 功能描述:接口-I/O擴展器 16-Bit I/O Port Expander RoHS:否 制造商:NXP Semiconductors 邏輯系列: 輸入/輸出端數量: 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 |
| MAX7312AAG-T | 功能描述:接口-I/O擴展器 RoHS:否 制造商:NXP Semiconductors 邏輯系列: 輸入/輸出端數量: 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 |
| MAX7312ATG | 功能描述:接口-I/O擴展器 16-Bit I/O Port Expander RoHS:否 制造商:NXP Semiconductors 邏輯系列: 輸入/輸出端數量: 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 |
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