MC9S08QE16CLC Datasheet, PDF (221/350 Pages) Freescale Semiconductor, Inc – Low-power wireless applications, Gas, water and heater meters

Figure 13-3 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
PE
PT
Freescale Semiconductor
RDRF
RIE
IDLE
ILIE
LBKDIF
LBKDIE
RXEDGIF
RXEDGIE
OR
ORIE
FE
FEIE
NF
NEIE
PARITY
CHECKING
PF
PEIE
Figure 13-3. SCI Receiver Block Diagram
MC9S08AC60 Series Data Sheet, Rev. 3
Rx INTERRUPT
REQUEST
ERROR INTERRUPT
REQUEST
221