MC908AP16CFAE Datasheet, PDF (190/324 Pages) Freescale Semiconductor, Inc – Table of Contents

Infrared Serial Communications Interface Module (IRSCI)
INTERNAL BUS
CKS
CGMXCLK
BUS CLOCK
A
B
SL
X
SL = 0 => X = A
SL = 1 => X = B
SCP1
SCP0
PRE-
BAUD
SCALER DIVIDER
SCR1
SCR2
SCR0
÷ 16
SCI_RxD
DATA
RECOVERY
ALL 0s
BKF
RPF
SCI DATA REGISTER
11-BIT
RECEIVE SHIFT REGISTER
H876543210L
M
WAKE
ILTY
WAKEUP
LOGIC
SCRF
RWU
IDLE
PEN
PARITY
PTY
CHECKING
IDLE
ILIE
DMARE
SCRF
SCRIE
DMARE
SCRF
SCRIE
DMARE
OR
ORIE
NF
NEIE
FE
FEIE
PE
PEIE
Figure 12-8. SCI Receiver Block Diagram
R8
ILIE
SCRIE
DMARE
OR
ORIE
NF
NEIE
FE
FEIE
PE
PEIE
12.5.3.1 Character Length
The receiver can accommodate either 8-bit or 9-bit data. The state of the M bit in IRSCI control register 1
(IRSCC1) determines character length. When receiving 9-bit data, bit R8 in IRSCI control register 2
(IRSCC2) is the ninth bit (bit 8). When receiving 8-bit data, bit R8 is a copy of the eighth bit (bit 7).
MC68HC908AP Family Data Sheet, Rev. 4
190
Freescale Semiconductor