Datasheet

Infrared Serial Communications Interface Module (IRSCI)
MC68HC908AP Family Data Sheet, Rev. 4
182 Freescale Semiconductor
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.
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.
Table 12-1. Pin Name Conventions
Generic Pin Names: RxD TxD
Full Pin Names:
PTC7/SCRxD
PTC6/SCTxD
Addr. Register Name Bit 7 654321Bit 0
$0040
IRSCI Control Register 1
(IRSCC1)
Read:
LOOPS ENSCI
0
M WAKE ILTY PEN PTY
Write:
Reset:00000000
$0041
IRSCI Control Register 2
(IRSCC2)
Read:
SCTIE TCIE SCRIE ILIE TE RE RWU SBK
Write:
Reset:00000000
$0042
IRSCI Control Register 3
(IRSCC3)
Read: R8
T8 DMARE DMATE ORIE NEIE FEIE PEIE
Write:
Reset:UU000000
$0043
IRSCI Status Register 1
(IRSCS1)
Read: SCTE TC SCRF IDLE OR NF FE PE
Write:
Reset:11000000
$0044
IRSCI Status Register 2
(IRSCS2)
Read:
BKF RPF
Write:
Reset:00000000
$0045
IRSCI Data Register
(IRSCDR)
Read: R7 R6 R5 R4 R3 R2 R1 R0
Write: T7 T6 T5 T4 T3 T2 T1 T0
Reset: Unaffected by reset
$0046
IRSCI Baud Rate Register
(IRSCBR)
Read:
CKS
0
SCP1 SCP0 R SCR2 SCR1 SCR0
Write:
Reset:00000000
$0047
IRSCI Infrared Control
Register
(IRSCIRCR)
Read:
R
000
R TNP1 TNP0 IREN
Write:
Reset:00000000
= Unimplemented R = Reserved U = Unaffected
Figure 12-1. IRSCI I/O Registers Summary