Texas Instruments DRA76xP-ACD, User Manual, Page: 31 / 38

SoC
Mux
K
B1
B2
COM8Q
Connector
Expansion
Connector
A1=B1 or A1=B2
A1
SN74CBTLV3257
Copyright © 2017, Texas Instruments Incorporated
SPI2_SCLK, _D[1:0],_CS[0]
UART3
UART3_RXD, _TXD,_CTSn,_RTSn
SPI2
SPI2_SCLK,_D[1:0],_CS[0]
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Signal Multiplex Logic
31 SPRUII5A – December 2017 – Revised November 2018
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DRA77xP/DRA76xP-ACD CPU EVM Board
4.8 SPI2/UART3 Selection (Mux K)
Table 23 is part of the SoC pinmux table for SPI2. The SoC device supports additional functions not
shown in the table. The functions shown are intended to reflect those supported on the EVM. These
include:
• SPI Serial Bus (SPI2): SCLK, D[1:0], CS[0]
• UART Serial Bus (UART3): TXD, RXD, CTSN, RTSN
Table 23. SoC Pinmux for SPI2/UART3
Pad Name Function 1 Function2
spi2_sclk SPI2 spi2_sclk UART3 uart3_rxd
spi2_d[1] SPI2 spi2_d[1] UART3 uart3_txd
spi2_d[0] SPI2 spi2_d[0] UART3 uart3_ctsn
spi2_cs[0] SPI2 spi2_cs[0] UART3 uart3_rtsn
Mux K: Selects between Bluetooth (COM8Q module) and Expansion interface. The selection is made
using the IO expander #2, bits P16, defaulting to Expansion.
Figure 14. Mux Diagram for SPI2/UART3