Laird SDC-SSD30AG, Hardware Integration Manual

Page: 13 / 26

SDC-SSD30AG
Hardware Integration Guide, version 3.3
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13
Laird Technologies
Pin
Number
Pin
Name
I/O
Power
Supply
Description
30 RSVD N/C Reserved – No Connect
31 RSVD N/C Reserved – No Connect
32 VDDIO
3.3/1.8V I/O Power
This is the reference pin for all I/O signaling pins.
It accepts 1.8VDC to 3.3VDC
33 WL_LED_ACT O VDDIO
WLAN LED activity indicator
I
OH
= 2mA max (VDDIO = 1.8V)
I
OH
= 4mA max (VDDIO = 3.3V)
See the LED Support note below.
34 WL_GPIO_1 O VDDIO
Wake on Wireless. Internal pull-down.
Wake on Wireless is not currently supported in the
software. May be left open
35 SYS_RST_L I VDDIO
Resets the radio, active low. Must be asserted when
power is first applied to the radio, then released before
any transaction can start.
See Electrical Considerations for the recommended
SYS_RST_L circuitry.
See Note 2 .
36 CHIP_PWD_L I VDDIO
Powers down the radio, active low;
4.7K pull-up resistor to VDDIO is recommended.
See Note 2 .
37 RSVD N/C Reserved – No Connect
38 SDIO_DATA_0 I/O VDDIO
SDIO Data 0 – Internal pull-up.
No external pull-up required
39 GND Ground
40 SDIO_CLK I VDDIO SDIO Clock (25MHz max)
41 GND Ground
42 SDIO_DATA_1 I/O VDDIO
SDIO Data 1 – Internal pull-up.
No external pull-up resistor required
43 SDIO_DATA_3 I/O VDDIO
SDIO Data 3 – Internal pull-up.
No external pull-up resistor required
44 SDIO_DATA_2 I/O VDDIO
SDIO Data 2 – Internal pull-up.
No external pull-up resistor required
45 SDIO_CMD I/O VDDIO
SDIO Command – Internal pull-up.
No external pull-up resistor required
46 GND Ground
47 RSVD N/C Reserved – No Connect
48 SDIO_SEL I VDDIO
SDIO Selection, hold high.
External pull-up resistor required
49 WLAN_ACTIVE O VDDIO Not Supported. Leave open (float).