2.5V~5.5V電源供電。16個IO端口中的任何一個都可以配置為LED模式或GPIO模式。此外，任何GPIO都可以單獨(dú)配置為輸入或輸出。
通電后，16個IO端口配置默認(rèn)為GPIO輸出，默認(rèn)狀態(tài)根據(jù)AD0和AD1決定。所有配置為輸入的IO端口都會持續(xù)監(jiān)控狀態(tài)變化，并具有8μs的防抖動時間，IO口的變化由INTN輸出指示。當(dāng)GPIO狀態(tài)通過I2C接口被讀取時，INTN輸出被清除。
當(dāng)IO端口配置為LED模式時，可以通過I2C接口將LED驅(qū)動器的電流設(shè)置在0~IMAX之間，并可以以該值除以256步進(jìn)行線性調(diào)光。默認(rèn)最大電流（IMAX）為37mA，可在全局在控制寄存器中更改IMAX。
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數(shù)量:
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特點(diǎn)
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引腳號 | 名稱 | 功能 |
1~4 | P1_0~P1_3 | GPIO mode default, input or output (push-pull), the state after power on is decided by AD1 and AD0 terminals. Can be configured as LED mode. 默認(rèn)GPIO模式，輸入或輸出（推挽結(jié)構(gòu)），上電默認(rèn)狀態(tài)由AD1和AD0決定。可設(shè)置為LED模式。 |
5~8 | P0_0~P0_3 | GPIO mode default, input or output (open-drain (default) or push-pull), the state after power on is decided by AD1 and AD0 terminals. Can be configured as LED mode. 默認(rèn)GPIO模式，輸入或輸出（開漏結(jié)構(gòu)（默認(rèn)）或推挽結(jié)構(gòu)），上電默認(rèn)狀態(tài)由AD1和AD0決定?？稍O(shè)置為LED模式。 |
9 | GND | Ground. 地 |
10~13 | P0_4~P0_7 | GPIO mode default, input or output (open-drain (default) or push-pull), the state after power on is decided by AD1 and AD0 terminals. Can be configured as LED mode. 默認(rèn)GPIO，輸入或輸出（開漏結(jié)構(gòu)（默認(rèn)）或推挽結(jié)構(gòu)），上電默認(rèn)狀態(tài)由AD1和AD0決定。可設(shè)置為LED模式。 |
14~17 | P1_4~P1_7 | GPIO mode default, input or output (push-pull), the state after power on is decided by AD1 and AD0 terminals. Can be configured as LED mode. 默認(rèn)GPIO，輸入或輸出(推挽結(jié)構(gòu)), ，上電默認(rèn)狀態(tài)由AD1和AD0決定?？稍O(shè)置為LED模式。 |
18 | AD0 | I2C device address, connect to VCC or GND，and control the default state of GPIOs (see table 1)。 I2C器件地址選擇，接VCC或GND，并設(shè)置GPIO狀態(tài)（見表1）。 |
19 | SCL | I2C serial clock. I2C時鐘 |
20 | SDA | I2C serial data. I2C數(shù)據(jù) |
21 | VCC | Power supply. 電源輸入端. |
22 | INTN | Interrupt output pin, open-drain, need external pull-up resistor; active low. 中斷輸出，開漏結(jié)構(gòu)，需外部上拉電阻；低有效 |
23 | RSTN | Hardware reset pin, active low; internal 100 kΩ (typical) pull-down resistor. 硬件復(fù)位，低為復(fù)位；內(nèi)部下拉100 kΩ（典型值）電阻 |
24 | AD1 | I2C device address, connect to VCC or GND，and control the default state of GPIO (see table 1)。 I2C器件地址選擇，接VCC或GND，并設(shè)置GPIO狀態(tài)（見表1）。 |
EP | GND | Provides both electrical and thermal connection from the device to the board. Connect to the system ground. 接地。 |