Datasheet

NXP Semiconductors
88W8977
2.4 GHz/5 GHz Dual-band 1x1 Wi-Fi 4
®
and Bluetooth
®
5 Combo SoC
88W8977 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2020. All rights reserved.
Product short data sheet Rev. 1 — 13 July 2020
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4.4.7 SDIO host interface
Table 7. SDIO host interface
Pin Name Supply No Pad Power
State
Reset
State
HW State PD State PD Prog Internal PU/
PD
PU PD
SD_CLK VIO_SD tristate input input tristate no nominal PU yes yes
SDIO 4-bit Mode: Clock input
SDIO 1-bit Mode: Clock input
SD_CMD VIO_SD tristate input input tristate no nominal PU yes yes
SDIO 4-bit Mode: Command/response (input/output)
SDIO 1-bit Mode: Command line
SD_DAT[3] VIO_SD tristate input input tristate no nominal PU yes yes
SDIO 4-bit Mode: Data line Bit[3]
SDIO 1-bit Mode: Reserved
Bluetooth External Coexistence Mode: BT_REQ. See Section 4.4.6 "Bluetooth external coexistence interface".
SD_DAT[2] VIO_SD tristate input input tristate no nominal PU yes yes
SDIO 4-bit Mode: Data line Bit[2] or read wait (optional)
SDIO 1-bit Mode: Read wait (optional)
Bluetooth External Coexistence Mode: BT_STATE. See Section 4.4.6 "Bluetooth external coexistence interface".
SD_DAT[1] VIO_SD tristate input input tristate no nominal PU yes yes
SDIO 4-bit Mode: Data line Bit[1]
SDIO 1-bit Mode: Interrupt
Bluetooth External Coexistence Mode: BT_FREQ. See Section 4.4.6 "Bluetooth external coexistence interface".
SD_DAT[0] VIO_SD tristate input input tristate no nominal PU yes yes
SDIO 4-bit Mode: Data line Bit[0]
SDIO 1-bit Mode: Data line
Bluetooth External Coexistence Mode: BT_GRANT. See Section 4.4.6 "Bluetooth external coexistence interface".
NOTE: SDIO pin functions are unavailable when the Bluetooth external coexistence interface signals are used.
4.4.8 UART host interface
Table 8. UART host interface (MFP)
NOTE: Pins may be Multi-Functional Pins (MFP). See pin descriptions for functional modes.
Pin Name Type Supply Description
UART_SIN I VIO UART serial input signal - GPIO[9] input/output
UART_SOUT O VIO UART serial output signal - GPIO[8] input/output
UART_RTSn O VIO UART request-to-send output signal . Active low - GPIO[11] input/
output
UART_CTSn I VIO UART clear-to-send input signal - Active low - GPIO[10] input/output