MC908AP32CFBE Datasheet, PDF (182/324 Pages) Freescale Semiconductor, Inc – The following revision history table summarizes changes contained in this document. For your convenience, the page number designators have been linked to the appropriate location.

Infrared Serial Communications Interface Module (IRSCI)
12.2 Pin Name Conventions
The generic names of the IRSCI I/O pins are:
• RxD (receive data)
• TxD (transmit data)
IRSCI I/O (input/output) lines are implemented by sharing parallel I/O port pins. The full name of an IRSCI
input or output reflects the name of the shared port pin. Table 12-1 shows the full names and the generic
names of the IRSCI I/O pins. The generic pin names appear in the text of this section.
Table 12-1. Pin Name Conventions
Generic Pin Names:
Full Pin Names:
RxD
PTC7/SCRxD
TxD
PTC6/SCTxD
NOTE
When the IRSCI is enabled, the SCTxD pin is an open-drain output and
requires a pullup resistor to be connected for proper SCI operation.
Addr.
$0040
$0041
$0042
$0043
$0044
$0045
$0046
$0047
Register Name
Read:
IRSCI Control Register 1
(IRSCC1)
Write:
Reset:
Read:
IRSCI Control Register 2
(IRSCC2)
Write:
Reset:
Read:
IRSCI Control Register 3
(IRSCC3)
Write:
Reset:
Read:
IRSCI Status Register 1
(IRSCS1)
Write:
Reset:
Read:
IRSCI Status Register 2
(IRSCS2)
Write:
Reset:
Read:
IRSCI Data Register
(IRSCDR)
Write:
Reset:
Read:
IRSCI Baud Rate Register
(IRSCBR)
Write:
Reset:
IRSCI Infrared Control ^Read:
Register Write:
(IRSCIRCR) Reset:
Bit 7
LOOPS
0
SCTIE
0
R8
U
SCTE
1
0
R7
T7
CKS
0
R
0
6
ENSCI
0
TCIE
0
T8
U
TC
1
5
0
0
SCRIE
0
DMARE
0
SCRF
4
M
0
ILIE
0
DMATE
0
IDLE
0
0
3
WAKE
0
TE
0
ORIE
0
OR
0
0
0
R6
R5
T6
T5
0
SCP1
0
0
0
0
0
0
= Unimplemented
0
0
R4
R3
T4
T3
Unaffected by reset
SCP0
R
0
0
0
R
0
0
R = Reserved
2
1
ILTY
PEN
0
0
RE
RWU
0
0
NEIE
FEIE
0
0
NF
FE
0
0
BKF
0
0
R2
R1
T2
T1
SCR2
SCR1
0
0
TNP1
TNP0
0
0
U = Unaffected
Figure 12-1. IRSCI I/O Registers Summary
Bit 0
PTY
0
SBK
0
PEIE
0
PE
0
RPF
0
R0
T0
SCR0
0
IREN
0
MC68HC908AP Family Data Sheet, Rev. 4
182
Freescale Semiconductor