AN3123 datasheet(8/30 Pages) STMICROELECTRONICS

Part #	AN3123

Description	Using the UART interfaces in the SPEAr embedded MPU family

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

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UART signals

AN3123

8/30

Doc ID 16862 Rev 2

2.5

SPEAr320S

In SPEAr320S the external pin connections of UART0 are the same as the UART in

SPEAr300. Refer to Table 3.

You can configure the device to have:

●

up to 7 UARTs, 5 without modem control lines and 2 with modem control lines.

●

1 UART_RS485

PL_GPIO[42]

D9

UART0_DTR

PL_GPIO[41]

C9

UART0_RI

PL_GPIO[40]

B9

UART0_DSR

PL_GPIO[39]

A9

UART0_DCD

PL_GPIO[38]

A8

UART0_CTS

PL_GPIO[37]

B8

UART0_RTS

PL_GPIO[36]

C8

UART1_CTS

PL_GPIO[35]

D8

UART1_DTR

PL_GPIO[34]

E8

UART1_RI

PL_GPIO[33]

E7

UART1_DCD

PL_GPIO[32]

D7

UART1_DSR

PL_GPIO[31]

C7

UART1_RTS

PL_GPIO[29]

A7

UART1_TX

PL_GPIO[28]

A6

UART1_RX

PL_GPIO[3]

D1

UART0_RX

PL_GPIO[2]

E4

UART0_TX

PL_GPIO[1]

E3

UART2_TX

PL_GPIO[0]

F3

UART2_RX

Table 8.

UART configurations for SPEAr320 (continued)

Signal

Ball

Alternate

function

Config. 1

Config. 2

Config. 3

Config. 4

Table 9.

Memory map on SPEAr300

Peripheral

Start address

End address

UART0

0xD000.0000

0xD007.FFFF

UART1

0xA300.0000

0xA3FF.FFFF

UART2

0xA400.0000

0xA4FF.FFFF

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