SPMC68CK338CPV14 datasheet(75/133 Pages) FREESCALE

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MC68CK338

MOTOROLA

MC68CK338TS/D

M — Mode Select

0 = SCI frame: one start bit, eight data bits, one stop bit (10 bits total)

1 = SCI frame: one start bit, nine data bits, one stop bit (11 bits total)

WAKE — Wakeup by Address Mark

0 = SCI receiver awakened by idle-line detection

1 = SCI receiver awakened by address mark (last bit set)

TIE — Transmit Interrupt Enable

0 = SCI TDRE interrupts inhibited

1 = SCI TDRE interrupts enabled

TCIE — Transmit Complete Interrupt Enable

0 = SCI TC interrupts inhibited

1 = SCI TC interrupts enabled

RIE — Receiver Interrupt Enable

0 = SCI RDRF interrupt inhibited

1 = SCI RDRF interrupt enabled

ILIE — Idle-Line Interrupt Enable

0 = SCI IDLE interrupts inhibited

1 = SCI IDLE interrupts enabled

TE — Transmitter Enable

0 = SCI transmitter disabled (TXD pin may be used as I/O)

1 = SCI transmitter enabled (TXD pin dedicated to SCI transmitter)

The transmitter retains control of the TXD pin until completion of any character transfer that was in

progress when TE is cleared.

RE — Receiver Enable

0 = SCI receiver disabled (status bits inhibited)

1 = SCI receiver enabled

RWU — Receiver Wakeup

0 = Normal receiver operation (received data recognized)

1 = Wakeup mode enabled (received data ignored until awakened)

Setting RWU enables the wakeup function, which allows the SCI to ignore received data until awakened

by either an idle line or address mark (as determined by WAKE). When in wakeup mode, the receiver

status flags are not set, and interrupts are inhibited. This bit is cleared automatically (returned to normal

mode) when the receiver is awakened.

SBK — Send Break

0 = Normal operation

1 = Break frame(s) transmitted after completion of current frame

SBK provides the ability to transmit a break code from the SCI. If the SCI is transmitting when SBK is

set, it will transmit continuous frames of zeros after it completes the current frame, until SBK is cleared.

If SBK is toggled (one to zero in less than one frame interval), the transmitter sends only one or two

break frames before reverting to idle line or beginning to send data.

SCSR — SCI Status Register

$YFFC0C

NOT USED

TDRE

RDRF

RAF

IDLE

RESET:

Freescale Semiconductor, Inc.

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SPMC68CK338CPV14 Datasheet(PDF) 75 Page - Freescale Semiconductor, Inc

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