MC68HC908AP16CFB datasheet(280/440 Pages) MOTOROLA

280 / 440 page

Infrared Serial Communications

Data Sheet

MC68HC908AP Family — Rev. 2.5

280

MOTOROLA

normal operation, clear the SCTE bit by reading IRSCS1 with SCTE

set and then writing to IRSCDR. Reset sets the SCTE bit.

1 = IRSCDR data transferred to transmit shift register

0 = IRSCDR data not transferred to transmit shift register

TC — Transmission Complete Bit

This read-only bit is set when the SCTE bit is set, and no data,

preamble, or break character is being transmitted. TC generates an

SCI transmitter CPU interrupt request if the TCIE bit in IRSCC2 is also

set. TC is automatically cleared when data, preamble or break is

queued and ready to be sent. There may be up to 1.5 transmitter

clocks of latency between queueing data, preamble, and break and

the transmission actually starting. Reset sets the TC bit.

1 = No transmission in progress

0 = Transmission in progress

SCRF — SCI Receiver Full Bit

This clearable, read-only bit is set when the data in the receive shift

receiver CPU interrupt request. When the SCRIE bit in IRSCC2 is set,

SCRF generates a CPU interrupt request. In normal operation, clear

the SCRF bit by reading IRSCS1 with SCRF set and then reading the

IRSCDR. Reset clears SCRF.

1 = Received data available in IRSCDR

0 = Data not available in IRSCDR

IDLE — Receiver Idle Bit

This clearable, read-only bit is set when 10 or 11 consecutive logic 1s

appear on the receiver input. IDLE generates an SCI receiver CPU

interrupt request if the ILIE bit in IRSCC2 is also set. Clear the IDLE

bit by reading IRSCS1 with IDLE set and then reading the IRSCDR.

After the receiver is enabled, it must receive a valid character that sets

the SCRF bit before an idle condition can set the IDLE bit. Also, after

the IDLE bit has been cleared, a valid character must again set the

SCRF bit before an idle condition can set the IDLE bit. Reset clears

the IDLE bit.

1 = Receiver input idle

0 = Receiver input active (or idle since the IDLE bit was cleared)

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

MC68HC908AP16CFB Datasheet(PDF) 280 Page - Motorola, Inc

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