Data Sheet

5 RED bean Data sheet v1.4-18-11-15
Pin Name I/O Description
1 HCI_UART_RTS DO UART RTS signal
2 HCI_UART_CTS DI UART CTS signal
3 HCI_UART_TX DO UART TX signal
4 HCI_UART_RX DI UART RX signal
5 GND - Ground connection
6 WL_EN PU WLAN enable. Active high
7 BT_EN PU Bluetooth enable. Active high
8 SDIO_DATA2 B SDIO data bus D2
9 SDIO_DATA3 B SDIO data bus D3
10 SDIO_CMD DI SDIO CMD line signal
11 VDD_SDIO PI Voltage supply input 1.8V or 3.3V
12 GND - Ground connection
13 VDD33 PI +3V3 digital power supply
14 SDIO_CLK OD SDIO clock signal
15 SDIO_DATA0 B SDIO data bus D0
16 SDIO_DATA1 B SDIO data bus D1
17 SDIO_INT_L DO SDIO interupt signal
18 GND - Ground connection
19 HCI_UART_WAKEHOST_L OD Bluetooth wakeup host. Active high
20 N.C. - Not connected
21 N.C. - Not connected
22 WLAN_RFKILL_L PU Turn o WLAN RF analog at front-end. Active low
23 GND - Ground connection
DO - Digital output signal
DI - Digital input CMOS
B - Bidirectional digital with CMOS input
PI - Power input
OD - A digital output signal with open drain
PU - Input signals with weak internal pull-up, to prevent signals from oating
when left open
Power supply
Use pins 11, 13 for module powering. For SDIO3.0 mode use 1.8V, in SDIO2.0 mode module can be powered 1.8V or 3.3V.
Power ratings
Parameter Units Min Nominal Max
Supply voltage (VDD33)
V 3.135 3.3 3.465
Supply voltage (VDD_SDIO)
V - 1.8 or 3.3 -
Soware
Drivers for RED bean SDIO module (based on QCA9377-3) are available for Windows 7, Windows 10, Linux and Android
operating systems.