AIROC™ Bluetooth® system on chip for automotive applications
Pin assignments and GPIOs
Table 5. 48-pin WQFN pin assignment (continued)
Pin number
WQFN-48
Power
Pin name
I/O
Description
domain
IFVSS
–
I
VSS
Ground
UART
Clear to send (CTS) for HCI UART interface.
Leave unconnected if not used.
Request to send (RTS) for HCI UART interface.
Leave unconnected if not used.
UART serial input. Serial data input for the HCI UART
interface.
UART serial output. Serial data output for the HCI UART
interface.
UART_CTS_N
UART_RTS_N
UART_RXD
35
34
32
33
I, PU VDDO
O,
VDDO
PU
I
VDDO
VDDO
O,
PU
UART_TXD
Crystal
Crystal oscillator input. See “The XTAL must have an
accuracy of ±20 ppm as defined by the Bluetooth®
specification. Two external load capacitors are
required to work with the crystal oscillator. The
selection of the load capacitors is XTAL-dependent (see
Figure 1)” for options.
XTALI
27
I
PLLVDD
XTALO
28
38
37
–
O
I
O
O
PLLVDD
VDDO
VDDO
N/A
Crystal oscillator output
XTALI_32K
XTALO_32K
CLK_REQ
Other
Low-power oscillator input
Low-power oscillator output
Used for shared-clock application
RF
23
12
–
I
–
RF antenna port
Active-low system reset with internal pull-up
resistor.
RST_N
VDDO
Arm® JTAG debug mode control. Connect to GND for all
applications.
JTAG_SEL
GPIOs
13
–
–
A signal from the CYW89820 device to the host
indicating that the Bluetooth® device requires
attention.
HOST_WAKE
29
O
VDDO
• GPIO: P1
• Keyboard scan input (row): KSI1
• A/D converter input 28
• Peripheral UART: puart_rts
• SPI_1: MISO (slave only)
• UART1_RXD
P1
5
I/O VDDO
• Supermux I/O functions as defined in Table 6 and
Table 7.
Note
1. All grounds in WQFN package connected to ground paddle.
Datasheet
23
002-25826 Rev. *G
2022-09-24
INFINEON [ Infineon ]
