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参数资料
| 型号： | MAX7314ATG+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 4/25页 |
| 文件大小： | 0K |
| 描述： | IC I/O EXPANDER I2C 16B 24TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 75 |
| 接口： | I²C |
| 输入/输出数： | 18 |
| 中断输出： | 是 |
| 频率 - 时钟： | 400kHz |
| 电源电压： | 2 V ~ 3.6 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-WFQFN 裸露焊盘 |
| 供应商设备封装： | 24-TQFN-EP（4x4） |
| 包装： | 管件 |
MAX7314
Transition Detection
All ports configured as inputs are always monitored for
changes in their logic status. The action of reading an
input ports register or writing to the configuration regis-
ter samples the corresponding 8 port bits’ input condi-
tion (Tables 4, 6). This sample is continuously
compared with the actual input conditions. A detected
change in input condition causes an interrupt condition.
The interrupt is cleared either automatically if the
changed input returns to its original state, or when the
appropriate input ports register is read, updating the
compared data (Figure 10). Randomly changing a port
from an output to an input may cause a false interrupt
to occur if the state of the input does not match the
content of the appropriate input ports register. The
interrupt status is available as the interrupt flag INT in
the configuration register (Table 4).
The input status of all ports is sampled immediately
after power-up as part of the MAX7314’s internal initial-
ization, so if all the ports are pulled to valid logic levels
at that time, an interrupt does not occur at power-up.
INT/O16 Output
The INT/O16 output pin can be configured as either the
INT output that reflects the interrupt flag logic state or as
a general-purpose output O16. When used as a general-
purpose output, the INT/O16 pin has the same blink and
PWM intensity control capabilities as the other ports.
Set the interrupt enable I bit in the configuration register
to configure INT/O16 as the INT output (Table 4). Clear
interrupt enable to configure INT/O16 as the O16. The
O16 logic state is set by the 2 bits O1 and O0 in the
configuration register. O16 follows the rules for blinking
selected by the blink enable flag E in the configuration
register. If blinking is disabled, then interrupt output
control O0 alone sets the logic state of the INT/O16 pin.
If blinking is enabled, then both interrupt output con-
trols O0 and O1 set the logic state of the INT/O16 pin
according to the blink phase. PWM intensity control for
O16 is set by the 4 global intensity bits in the master
and O16 intensity register (Table 13).
18-Port GPIO with LED Intensity Control,
Interrupt, and Hot-Insertion Protection
12
______________________________________________________________________________________
Table 3. Power-Up Configuration
REGISTER DATA
REGISTER FUNCTION
POWER-UP CONDITION
ADDRESS
CODE
(hex)
D7
D6
D5
D4
D3
D2
D1
D0
Blink phase 0 outputs P7–P0
High-impedance outputs
0x02
1
Blink phase 0 outputs P15–P8
High-impedance outputs
0x03
1
Ports configuration P7–P0
Ports P7–P0 are inputs
0x06
1
Ports configuration P15–P8
Ports P15–P8 are inputs
0x07
1
Blink phase 1 outputs P7–P0
High-impedance outputs
0x0A
1
Blink phase 1 outputs P15–P8
High-impedance outputs
0x0B
1
Master, O16 intensity
PWM oscillator is disabled;
O16 is static logic output
0x0E
0
1
Configuration
INT/O16 is interrupt output;
blink is disabled;
global intensity is enabled
0x0F
0
1
0
Outputs intensity P1, P0
P1, P0 are static logic outputs
0x10
1
Outputs Intensity P3, P2
P3, P2 are static logic outputs
0x11
1
Outputs intensity P5, P4
P5, P4 are static logic outputs
0x12
1
Outputs intensity P7, P6
P7, P6 are static logic outputs
0x13
1
Outputs intensity P9, P8
P9, P8 are static logic outputs
0x14
1
Outputs intensity P11, P10
P11, P10 are static logic outputs
0x15
1
Outputs intensity P13, P12
P13, P12 are static logic outputs
0x16
1
Outputs intensity P15, P14
P15, P14 are static logic outputs
0x17
1
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX7314ATG+ | 功能描述:外围驱动器与原件 - PCI 18-Port GPIO RoHS:否 制造商:PLX Technology 工作电源电压: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:FCBGA-1156 封装:Tray |
| MAX7314ATG+T | 功能描述:接口-I/O扩展器 18-Port GPIO RoHS:否 制造商:NXP Semiconductors 逻辑系列: 输入/输出端数量: 最大工作频率:100 kHz 工作电源电压:1.65 V to 5.5 V 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:HVQFN-16 封装:Reel |
| MAX7314ATG-T | 功能描述:外围驱动器与原件 - PCI RoHS:否 制造商:PLX Technology 工作电源电压: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:FCBGA-1156 封装:Tray |
| MAX7314EVKIT+ | 功能描述:外围驱动器与原件 - PCI Evaluation Kit for the MAX7314 RoHS:否 制造商:PLX Technology 工作电源电压: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:FCBGA-1156 封装:Tray |
| MAX7315 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:8-Port I/O Expander with LED Intensity Control and Interrupt |
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