ST2202A datasheet(53/75 Pages) SITRONIX

53 / 75 page

ST2202A

Ver 2.5

53/75

9/16/2008

pins also interface to standard RS-232 and infrared

transceiver modules.

18.4 UART Control/Status Registers

18.4.1 UART Control Register

TABLE 18-2 UART Control Register

Address Name

R/W

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Default

$060

UCTR

R/W

PEN

PMOD

UMOD

BRK

- - - - 0000

Bit 3:

PEN : Parity control bit

0 = Disable parity

1 = Enable parity

Bit 2:

PMOD : Parity mode selection bit

0 = Even parity

1 = Odd parity

Bit 1:

UMOD : 7-/8- bit mode selection bit

0 = 7- bit mode (the received data bit 7 will be set to zero)

1 = 8-bit mode

Bit 0:

BRK : Break character

0 = Normal character

1 = Transmit break character

18.4.2 UART Status Control Register

TABLE 18-3 UART Status Control Register

Address Name

R/W

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Default

FER

PER

OER

RXBZ

RXEN

TXBZ

TXEN

-000 0000

$061

USTR

RXTRG

RXEN

TXTRG

TXEN

- - - - 0000

Bit 6:

FER : Received data frame error status bit

0 = Current received data is normal

1 = Frame error occurs

Bit 5:

PER : Parity error status bit

0 = Current received data is normal

1 = Parity error occurs

Bit 4:

OER : Overrun error status bit

0 = Current received data is normal

1 = Overrun occurs

Bit 3:

RXBZ : Receiver busy bit

0 = Receiver is not busy

1 = Receiver is busy

Bit 2:

RXEN : Receiver control bit

0 = Receiver is disabled

1 = Receiver is enabled

Bit 1:

TXBZ : Transmitter busy bit

0 = Transmitter is not busy

1 = Transmitter is busy

Bit 0:

TXEN : Transmitter control bit

0 = Transmitter is disabled

1 = Transmitter is enabled

Bit 3:

RXTRG : Receiver trigger bit

Writing “1” to make receiver to be ready for next

data

Bit 1:

TXTRG : Transmitter trigger bit

Writing “1” to trigger the transmitter to start

transmission

ST2202A Datasheet(PDF) 53 Page - Sitronix Technology Co., Ltd.

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