Datasheet

The micro-SD card available with the board does not support ultra high-speed (UHS) modes.

NOTE

The part number of the micro-SDHC connector J55 is 95220030-14RRF. The table below shows the pinout details of the micro-

SDHC connector.

Table 14. Micro-SDHC connector pinout

Pin number SDHC signals Direction with respect to LS1046A I/O voltage

1 SD_DATA2 Bidirectional 3.3 V

2 SD_DATA3 Bidirectional

3 SD_CMD From LS1046A

4 3V3

5 SD_CLK From LS1046A

6 GND

7 SD_DATA0 Bidirectional

8 SD_DATA1 Bidirectional

9 SDHC_CD_B To LS1046A

The SDHC_CD_B signal of the micro-SDHC connector indicates presence/absence of card in the connector slot. This signal goes

to I2C2 controller through the IIC2_SCL pin of the controller. The IIC2_SCL pin must be programmed in RCW (by setting

RCW[I2C2_EXT] to 001) to serve as the SDHC_CD_B pin for the eSDHC controller. This happens automatically when the micro-

SD card is selected as the boot source for the board.

2.8

UART interface

The LS1046A processor has two dual universal asynchronous receiver/transmitter (DUART) modules, DUART1 and DUART2,

each containing two UARTs. Each DUART module can work as one UART with flow control or two UARTs without flow control.

The FRWY-LS1046A supports both DUART modules of the LS1046A processor; however, it does not support flow control on

DUART1 module, it means, this DUART module works as two UARTs (UART1 and UART3) on the board. Flow control is supported

on DUART2 module, which can work as one UART (UART2) or two UARTs (UART2 and UART4). The figure below shows the

UART diagram of the FRWY-LS1046A.

FRWY-LS1046A Functional Description

Layerscape FRWY-LS1046A Board Reference Manual, Rev. 0, 26 April 2019

NXP Semiconductors