MC9S08QG8_09 Datasheet, PDF (198/314 Pages) Freescale Semiconductor, Inc – HCS08 Microcontrollers

Serial Communications Interface (S08SCIV3)
Figure 14-4 shows the receiver portion of the SCI.
INTERNAL BUS
16 × BAUD
RATE CLOCK
DIVIDE
BY 16
FROM RxD PIN
M
DATA RECOVERY
LOOPS
RSRC
SINGLE-WIRE
LOOP CONTROL
FROM
TRANSMITTER
WAKE
ILT
(READ-ONLY)
SCID – Rx BUFFER
11-BIT RECEIVE SHIFT REGISTER
H8 7 6 5 4 3 2 1 0 L
SHIFT DIRECTION
WAKEUP
LOGIC
RWU
RDRF
RIE
IDLE
ILIE
Rx INTERRUPT
REQUEST
OR
ORIE
FE
FEIE
ERROR INTERRUPT
REQUEST
NF
NEIE
PE
PARITY
PT
CHECKING
PF
PEIE
Figure 14-4. SCI Receiver Block Diagram
MC9S08QG8 and MC9S08QG4 Data Sheet, Rev. 5
196
Freescale Semiconductor