ROHS MC9S08QE128 Reference Manual page 252

Serial Communications Interface (S08SCIV4)
Figure 14-4 shows the receiver portion of the SCI.
16 × BAUD
RATE CLOCK
FROM
TRANSMITTER
LOOPS
SINGLE-WIRE
LOOP CONTROL
RSRC
FROM RxD PIN
RXINV
ACTIVE EDGE
DETECT
PE
PT
252
INTERNAL BUS
DIVIDE
BY 16
M
LBKDE
DATA RECOVERY
WAKE
ILT
PARITY
CHECKING
Figure 14-4. SCI Receiver Block Diagram
MC9S08QE128 MCU Series Reference Manual, Rev. 2
(READ-ONLY)
SCID – Rx BUFFER
11-BIT RECEIVE SHIFT REGISTER
H 8 7 6 5
WAKEUP
RWU
LOGIC
RDRF
RIE
IDLE
ILIE
LBKDIF
LBKDIE
RXEDGIF
RXEDGIE
OR
ORIE
FE
FEIE
NF
NEIE
PF
PEIE
4 3 2 1 0 L
SHIFT DIRECTION
RWUID
Rx INTERRUPT
REQUEST
ERROR INTERRUPT
REQUEST
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