LS1020A datasheet(39/71 Pages) FREESCALE

Part #	LS1020A

Description	TWR-LS1021A Reference Manual

PDF	71 Pages

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Manufacturer	FREESCALE [Freescale Semiconductor, Inc]

Direct Link	http://www.freescale.com

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39 / 71 page

Architecture

TWR-LS1021A Reference Manual, Rev. 0

2-24

Freescale Semiconductor

2.18

Serial ports

The TWR-LS1021A connect LS1021A UART1 2-wire serial ports to MBED circuit and convert UART

signals to a mini USB connector as console UART. TWR-LS1021A could support a 4-wire LPUART by

TWR modules, in this case, RTS/CTS flow control is supported. Figure 2-19 shows an overview of the

serial ports.

Figure 2-18. Serial architecture

To support the 4-wire LPUART, CPLD can select LPUART1 signals from multiplexed SPI2 signals.

2.18.1

UART configuration and setup

The UART configuration controls are described in Table 2-17.

EVT0_B

N.A

Unused, pull up only.

EVT1_B

N.A

Unused

EVT2_B

N.A

Unused

EVT3_B

N.A

Unused

EVT4_B

N.A

Unused.

EVT9_B

SGMII1 Interrupt

+1.8V O1VDD, pull-up on board

Table 2-16. Interrupt connections (continued)

Signal names

Connected devices

Note

LS1020A Datasheet(PDF) 39 Page - Freescale Semiconductor, Inc