MC68HCP11 Datasheet, PDF (27/45 Pages) Motorola, Inc – 8-Bit Microcontroller

WAKE — Wake Up by Address Mark/Idle
0 = Wake up by IDLE line recognition
1 = Wake up by address mark (most significant data bit set)
SCCR2 — SCI Control Register 2
$102D
Bit 7
6
5
4
3
TIE
TCIE
RIE
ILIE
TE
RESET:
0
0
0
0
0
2
1
Bit 0
RE
RWU SBK
0
0
0
TIE — Transmit Interrupt Enable
0 = TDRE interrupts disabled
1 = SCI interrupt requested when TDRE status flag is set
TCIE — Transmit Complete Interrupt Enable
0 = TC interrupts disabled
1 = SCI interrupt requested if TC is set to one
RIE — Receiver Interrupt Enable
0 = RDRF and OR interrupts disabled
1 = SCI interrupt requested when RDRF flag or the OR status flag is set
ILIE — Idle Line Interrupt Enable
0 = IDLE interrupts disabled
1 = SCI interrupt requested when IDLE status flag is set
TE — Transmitter Enable
0 = Transmitter disabled
1 = Transmitter enabled
RE — Receiver Enable
0 = Receiver disabled
1 = Receiver enabled
RWU — Receiver Wake Up Control
0 = Normal SCI receiver
1 = Wake up enabled and receiver interrupts inhibited
SBK — Send Break
0 = Break generator off
1 = Break codes generated as long as SBK is set to one
SCSR — SCI Status Register
$102E
Bit 7
6
5
4
3
2
1
Bit 0
TDRE
TC
RDRF IDLE
OR
NF
FE
0
RESET:
1
1
0
0
0
0
0
0
TDRE — Transmit Data Register Empty Flag
Set if transmit data can be written to SCDR; if TDRE is zero, transmit data register is busy. Cleared by
SCSR read with TDRE set followed by SCDR write.
TC — Transmit Complete Flag
Set if transmitter is idle (no data, preamble, or break transmission in progress). Cleared by SCSR read
with TC set followed by SCDR write.
MC68HC11A8
MC68HC11A8TS/D
MOTOROLA
27