I2C Port Expander with Eight Push-Pull Outputs and Eight Inputs ________" />
參數(shù)資料
型號(hào)： MAX7324ATG+T
廠商： Maxim Integrated Products
文件頁(yè)數(shù)： 5/20頁(yè)
文件大?。?/td> 0K
描述： IC I/O EXPANDER I2C 8B 24TQFN-EP
產(chǎn)品培訓(xùn)模塊： Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝： 2,500
接口： I²C
輸入/輸出數(shù)： 8
中斷輸出： 是
頻率 - 時(shí)鐘： 400kHz
電源電壓： 1.71 V ~ 5.5 V
工作溫度： -40°C ~ 125°C
安裝類(lèi)型： 表面貼裝
封裝/外殼： 24-WFQFN 裸露焊盤(pán)
供應(yīng)商設(shè)備封裝： 24-TQFN-EP（4x4）
包裝： 帶卷 (TR)
包括： POR
MAX7324
I2C Port Expander with Eight Push-Pull Outputs
and Eight Inputs
______________________________________________________________________________________
13
When the master reads 2 bytes from the output ports of
the MAX7324 and subsequently issues a STOP condi-
tion (Figure 7), the MAX7324 transmits the current port
data, followed by the transition flags. The transition
flags are then cleared, and transition detection is reset.
INT deasserts during the slave acknowledge. The new
snapshot data is the current port data transmitted to the
master, and therefore, port transitions occuring during
the transmission are detected. INT remains high until
the STOP condition. When the master reads more than
2 data bytes, the input port data alternates with the
transition flag.
A read from the output ports of the MAX7324 starts with
the master transmitting the ports’ slave address with
the R/W bit set high. The MAX7324 acknowledges the
slave address and samples the logic state of the output
ports during the acknowledge bit. The master can read
one or more bytes from the output ports of the
MAX7324, and then issues a STOP condition (Figure 8).
The MAX7324 transmits the current port data, read
back from the actual port outputs (not the port output
latches) during the acknowledge. If a port is forced to a
logic state other than its programmed state, the read-
back reflects this. If driving a capacitive load, the read-
back port level verification algorithms may need to take
the RC rise/fall time into account.
Typically, the master reads one byte from the ouput
ports of the MAX7324, then issues a STOP condition
(Figure 8). However, the master can read two or more
bytes from the output ports of the MAX7324, and then
issues a STOP condition. In this case, the MAX7324
resamples the port outputs during each acknowledge
and transmits the new data each time.
SCL
MAX7324 SLAVE ADDRESS
SA
P
1
PORTS
ACKNOWLEDGE
FROM MAX7324
ACKNOWLEDGE
FROM MASTER
PORT SNAPSHOT
tIV
tPH
tIR
A
I0
I1
I2
I3
I4
I5
I6
I7
D0
D1
D2
D3
D4
D5
D6
D7
PORT SNAPSHOT
tPS
tIP
F0
F1
F2
F3
F4
F5
F6
F7
D7
D6
D5
D4
D3
D2
D1
D0
A
PORT SNAPSHOT
FLAG
INT OUTPUT
R/W
S = START CONDITION
A = ACKNOWLEDGE
P = STOP CONDITION
INT REMAINS HIGH UNTIL STOP CONDITION
Figure 7. Reading Input Ports of the MAX7324 (2 Data Bytes)
SCL
MAX7324 SLAVE ADDRESS
SA
P
1
ACKNOWLEDGE FROM MAX7324
PORT SNAPSHOT DATA
PORT SNAPSHOT TAKEN
A
P0
P1
P2
P3
DATA 1
P4
P5
P6
P7
D0
D1
D2
D3
D4
D5
D6
D7
PORT SNAPSHOT TAKEN
ACKNOWLEDGE
FROM MASTER
R/W
Figure 8. Reading Output Ports of the MAX7324
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX7324EVCMAXQU+ 功能描述:界面開(kāi)發(fā)工具 Maxim Evaluation System RoHS:否 制造商:Bourns 產(chǎn)品:Evaluation Boards 類(lèi)型:RS-485 工具用于評(píng)估:ADM3485E 接口類(lèi)型:RS-485 工作電源電壓:3.3 V
MAX7324EVKIT+ 功能描述:界面開(kāi)發(fā)工具 Evaluation Kit/Evaluation System for the MAX7324 RoHS:否 制造商:Bourns 產(chǎn)品:Evaluation Boards 類(lèi)型:RS-485 工具用于評(píng)估:ADM3485E 接口類(lèi)型:RS-485 工作電源電壓:3.3 V
MAX7325 制造商:MAXIM 制造商全稱(chēng):Maxim Integrated Products 功能描述:I2C Port Expander with 8 Push-Pull and 8 Open-Drain I/Os
MAX7325_12 制造商:MAXIM 制造商全稱(chēng):Maxim Integrated Products 功能描述:I2C Port Expander with 8 Push-Pull and 8 Open-Drain I/Os
MAX7325AEG 功能描述:接口-I/O擴(kuò)展器 I2C Port Expander w/8 P-P Out & 8 I/O 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
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