ST20-GP1 datasheet(80/116 Pages) STMICROELECTRONICS

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ST20-GP1

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ASCTxBuffer register

Writing to the transmit buffer register starts data transmission.

ASCRxBuffer register

The received data and, if provided by the selected operating mode, the received parity bit can be

read from the receive buffer register.

ASCBaudRate

ASC base address + #00

Read/Write

Bit

Bit ﬁeld

Write Function

Read Function

15:0

ReloadVal

16-bit reload value

16-bit count value

Table 13.2 ASCBaudRate register format

ASCTxBuffer

ASC base address + #04

Write only

Bit

Bit ﬁeld

Function

TD0

Transmit buffer data D0

TD1

Transmit buffer data D1

TD2

Transmit buffer data D2

TD3

Transmit buffer data D3

TD4

Transmit buffer data D4

TD5

Transmit buffer data D5

TD6

Transmit buffer data D6

TD7/Parity

Transmit buffer data D7, or parity bit - dependent on the operating mode (the setting of the

Mode ﬁeld in the ASCControl register).

TD8/Parity

/Wake/0

Transmit buffer data D8, or parity bit, or wake-up bit or undeﬁned - dependent on the operating

mode (the setting of the Mode ﬁeld in the ASCControl register).

Note: If the Mode ﬁeld selects an 8-bit frame then this bit should be written as 0.

15:9

RESERVED. Write 0.

Table 13.3 ASCTxBuffer register format

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