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
TxD
PTC6/SCTxD
PTC7/SCRxD
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.
Register Name
Bit 7
LOOPS
0
6
ENSCI
0
5
4
3
WAKE
0
2
ILTY
0
1
PEN
0
Bit 0
PTY
0
Read:
Write:
Reset:
Read:
Write:
Reset:
Read:
Write:
Reset:
Read:
Write:
Reset:
Read:
Write:
Reset:
Read:
Write:
Reset:
Read:
Write:
Reset:
Read:
0
M
0
IRSCI Control Register 1
(IRSCC1)
$0040
0
SCTIE
TCIE
0
SCRIE
0
ILIE
0
TE
RE
0
RWU
0
SBK
0
IRSCI Control Register 2
(IRSCC2)
$0041
$0042
$0043
$0044
$0045
$0046
$0047
0
0
R8
T8
DMARE
DMATE
ORIE
NEIE
FEIE
PEIE
IRSCI Control Register 3
(IRSCC3)
U
U
0
0
0
0
0
0
SCTE
TC
SCRF
IDLE
OR
NF
FE
PE
IRSCI Status Register 1
(IRSCS1)
1
1
0
0
0
0
0
0
BKF
RPF
IRSCI Status Register 2
(IRSCS2)
0
0
0
0
0
0
0
0
R7
T7
R6
T6
R5
T5
R4
T4
R3
T3
R2
T2
R1
T1
R0
T0
IRSCI Data Register
(IRSCDR)
Unaffected by reset
0
CKS
0
SCP1
SCP0
R
0
SCR2
0
SCR1
0
SCR0
0
IRSCI Baud Rate Register
(IRSCBR)
0
0
0
0
0
0
IRSCI Infrared Control
R
R
0
TNP1
TNP0
0
IREN
0
Register Write:
(IRSCIRCR)
Reset:
0
0
0
0
0
= Unimplemented
R = Reserved
U = Unaffected
Figure 12-1. IRSCI I/O Registers Summary
MC68HC908AP Family Data Sheet, Rev. 4
182
Freescale Semiconductor
FREESCALE [ Freescale ]
