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參數(shù)資料
| 型號(hào)： | MAX7312ATG |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 2-Wire-Interfaced 16-Bit I/O Port Expander with Interrupt and Hot-Insertion Protection |
| 中文描述： | 16 I/O, PIA-GENERAL PURPOSE, QCC24 |
| 封裝： | 4 X 4 MM, 0.80 MM PITCH, MO-220WGGD-2, TQFN-24 |
| 文件頁數(shù)： | 11/17頁 |
| 文件大?。?/td> | 373K |
| 代理商： | MAX7312ATG |
Output Port Registers
The output port registers (Table 3) set the outgoing
logic levels of the I/Os defined as outputs by the
respective configuration register. Reads from the out-
put port registers reflect the value that is in the flip-flop
controlling the output selection, not the actual I/O value.
Polarity Inversion Registers
The polarity inversion registers (Table 4) enable polarity
inversion of pins defined as inputs by the respective
port configuration registers. Set the bit in the polarity
inversion register to invert the corresponding port pin
’
s
polarity. Clear the bit in the polarity inversion register to
retain the corresponding port pin
’
s original polarity.
Configuration Registers
The configuration registers (Table 5) configure the
directions of the I/O pins. Set the bit in the respective
configuration register to enable the corresponding port
as an input. Clear the bit in the configuration register to
enable the corresponding port as an output.
Bus Timeout
Set register 0x08 LSB (bit 0) to enable the bus timeout
function (Table 6) or clear it to disable the bus timeout
function. Enabling the timeout feature resets the
MAX7312 serial bus interface when SCL stops either high
or low during a read or write. If either SCL or SDA is low
for more than 29ms after the start of a valid serial transfer,
the interface resets itself and sets up SDA as an input.
The MAX7312 then waits for another START condition.
Standby
The MAX7312 goes into standby when the I
2
C bus is
idle. Standby supply current is typically 2.9μA.
Applications Information
Hot Insertion
The I/O ports I/O0
–
I/O15 interrupt output IRQ, and seri-
al interfaces SDA, SCL, AD0-2 remain high impedance
with up to 6V asserted on them when the MAX7312 is
powered down (V+ = 0V). The MAX7312 can therefore
be used in hot-swap applications.
Power-Supply Consideration
The MAX7312 operates from a supply voltage of 2V to
5.5V. Bypass the power supply to GND with a 0.047μF
capacitor as close to the device as possible.
M
2-Wire-Interfaced 16-Bit I/O Port Expander
with Interrupt and Hot-Insertion Protection
______________________________________________________________________________________
11
I7
I15
I6
I14
I5
I13
I4
I12
I3
I11
I2
I10
I1
I9
I0
I8
BIT
Table 2. Registers 0x00, 0x01
—
Input Port Registers
O7
O6
O5
O4
O3
O2
O1
O0
BIT
O15
1
O14
1
O13
1
O12
1
O11
1
O10
1
O9
1
O8
1
Power-up default
Table 3. Registers 0x02, 0x03
—
Output Port Registers
I/O7
I/O15
0
I/O6
I/O14
0
I/O5
I/O13
0
I/O4
I/O12
0
I/O3
I/O11
0
I/O2
I/O10
0
I/O1
I/O9
0
I/O0
I/O8
0
BIT
Power-up default
Table 4. Registers 0x04, 0x05
—
Polarity Inversion Registers
I/O7
I/O15
1
I/O6
I/O14
1
I/O5
I/O13
1
I/O4
I/O12
1
I/O3
I/O11
1
I/O2
I/O10
1
I/O1
I/O9
1
I/O0
I/O8
1
BIT
Power-up default
Table 5. Registers 0x06, 0x07
—
Configuration Registers
BIT
7
0
6
0
5
0
4
0
3
0
2
0
1
0
0
1
Power-up default
Table 6. Register 0x08
—
Timeout Register
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX7312ATG+ | 功能描述:接口-I/O擴(kuò)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(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 |
| MAX7312ATG+T | 功能描述:接口-I/O擴(kuò)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(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 |
| MAX7312ATG-T | 功能描述:接口-I/O擴(kuò)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(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 |
| MAX7312AUG | 功能描述:接口-I/O擴(kuò)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(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 |
| MAX7312AUG+ | 功能描述:接口-I/O擴(kuò)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(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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