User's Manual
M2SD50NBT
Datasheet
15
Pin# Name Type
Voltage
Reference
Description
IfNot
Used
22 BT_UART_TXD O 1.8V BTUARTtransmissiondata. N/C
23 WLANreset I 1.8V WLANresetorpowerdown;ActiveL
Alreadyhasinternal10Kpu ll‐up.
HoldthistoLtopowerdowntheWi‐Fichip.
N/C
24 MechanicalKey‐E ‐ ‐ ‐ ‐
25 MechanicalKey‐E ‐ ‐ ‐ ‐
26 MechanicalKey‐E ‐ ‐ ‐ ‐
27 MechanicalKey‐E ‐ ‐ ‐ ‐
28 MechanicalKey‐E ‐ ‐ ‐ ‐
29 MechanicalKey‐E ‐ ‐ ‐ ‐
30 MechanicalKey‐E ‐ ‐ ‐ ‐
31 MechanicalKey‐E ‐ ‐ ‐ ‐
32 BT_UART_RXD I 1.8V BTUARTreceivesdata. N/C
33 GND‐‐Ground GND
34 BT_UART_RTS O 1.8V BTUARTReadytoSend. N/C
35 N/C‐‐N/C N/C
36 BT_UART_CTS O 1.8V BTUARTCleartoSend. N/C
37 N/C‐‐N/C NC/
38 N/C‐‐N/C N/C
39 GND‐‐Ground GND
40 N/C‐‐N/C N/C
41 N/C‐‐N/C N/C
42 N/C‐‐N/C N/C
43 N/C‐‐N/C N/C
44 LTE_COEX3 I 1.8V ReservedforLTEcoexistence
Note:Notcurrentlysupported.
N/C
45 GND‐‐Ground GND
46 LTE_ACTIVE I 1.8V ReservedforLTEcoexistence
Note:Notcurrentlysupported.
N/C
47 N/C ‐ ‐ N/C N/C
48 LTE_FRAME_SYNC I 1.8V ReservedforLTEcoexistence
Note:Notcurrentlysupported.
N/C
49 N/C‐ ‐ N/C N/C
50 CLK_32K I 3.3V 32.768KHzslowclockinput.
NecessarytoputBTintodeepsleepmode.
N/C
51 GND‐‐Ground GND
52 N/C‐‐N/C N/C
53 N/C‐‐N/C N/C
54 BT_RFKILL I 3.3V ResetBTortodisableBT;ActiveL N/C