COP8CCR9IMT7SLASHNOPB datasheet(60/111 Pages) TI1

60 / 111 page

COP8CBR9, COP8CCR9, COP8CDR9

SNOS535I – OCTOBER 2000 – REVISED MARCH 2013

www.ti.com

PEN

PSEL1

XBIT9/

CHL1

CHL0

ERR

RBFL

TBMT

PSEL0

Bit 7

Bit 0

PEN: This bit enables/disables Parity (7- and 8-bit modes only). Read/Write, cleared on reset.

PEN = 0

Parity disabled.

PEN = 1

Parity enabled.

PSEL1, PSEL0: Parity select bits. Read/Write, cleared on reset.

PSEL1 = 0, PSEL0 = 0

Odd Parity (if Parity enabled)

PSEL1 = 0, PSEL1 = 1

Even Parity (if Parity enabled)

PSEL1 = 1, PSEL0 = 0

Mark(1) (if Parity enabled)

PSEL1 = 1, PSEL1 = 1

Space(0) (if Parity enabled)

XBIT9/PSEL0: Programs the ninth bit for transmission when the USART is operating with nine data bits

per frame. For seven or eight data bits per frame, this bit in conjunction with PSEL1 selects parity.

Read/Write, cleared on reset.

CHL1, CHL0: These bits select the character frame format. Parity is not included and is generated/verified

by hardware. Read/Write, cleared on reset.

CHL1 = 0, CHL0 = 0

The frame contains eight data bits.

CHL1 = 0, CHL0 = 1

The frame contains seven data bits.

CHL1 = 1, CHL0 = 0

The frame contains nine data bits.

CHL1 = 1, CHL0 = 1

Loopback Mode selected. Transmitter output internally looped back to receiver

input. Nine bit framing format is used.

ERR: This bit is a global USART error flag which gets set if any or a combination of the errors (DOE, FE,

PE, BD) occur. Read only; it cannot be written by software, cleared on reset.

RBFL: This bit is set when the USART has received a complete character and has copied it into the

RBUF register. It is automatically reset when software reads the character from RBUF. Read only; it

cannot be written by software, cleared on reset.

TBMT: This bit is set when the USART transfers a byte of data from the TBUF register into the TSFT

bit is set to “one” on reset; it cannot be written by software.

ENUR—USART RECEIVE CONTROL AND STATUS REGISTER (Address at 0BB)

DOE

RBIT9

ATTN

XMTG

RCVG

Bit 7

Bit 0

DOE: Flags a Data Overrun Error. Read only, cleared on read, cleared on reset.

DOE = 0

Indicates no Data Overrun Error has been detected since the last time the ENUR register

was read.

DOE = 1

Indicates the occurrence of a Data Overrun Error.

FE: Flags a Framing Error. Read only, cleared on read, cleared on reset.

FE = 0

Indicates no Framing Error has been detected since the last time the ENUR register was

read.

FE = 1

Indicates the occurrence of a Framing Error.

PE: Flags a Parity Error. Read only, cleared on read, cleared on reset.

Functional Description

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Product Folder Links: COP8CBR9 COP8CCR9 COP8CDR9

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