MC9S08EL32 Datasheet, PDF (251/356 Pages) Freescale Semiconductor, Inc – 8-Bit HCS08 Central Processor Unit (CPU)

Figure 14-3 shows the receiver portion of the SCI.
INTERNAL BUS
Serial Communications Interface (S08SCIV4)
16 × BAUD
RATE CLOCK
FROM
TRANSMITTER
DIVIDE
BY 16
LOOPS
RSRC
FROM RxD PIN
RXINV
SINGLE-WIRE
LOOP CONTROL
M
LBKDE
DATA RECOVERY
(READ-ONLY)
SCID – Rx BUFFER
11-BIT RECEIVE SHIFT REGISTER
H8 7 6 5 4 3 2 1 0 L
SHIFT DIRECTION
ACTIVE EDGE
DETECT
WAKE
ILT
WAKEUP
LOGIC
RWU
RWUID
RDRF
RIE
IDLE
ILIE
LBKDIF
LBKDIE
RXEDGIF
RXEDGIE
OR
ORIE
FE
FEIE
NF
NEIE
PE
PARITY
PT
CHECKING
PF
PEIE
Figure 14-3. SCI Receiver Block Diagram
Rx INTERRUPT
REQUEST
ERROR INTERRUPT
REQUEST
MC9S08EL32 Series and MC9S08SL16 Series Data Sheet, Rev. 3
Freescale Semiconductor
253