MC9S08SG8 Datasheet, PDF (202/310 Pages) Freescale Semiconductor, Inc – Microcontrollers

Serial Communications Interface (S08SCIV4)
Figure 14-3 shows the receiver portion of the SCI.
INTERNAL BUS
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
H876543210L
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
MC9S08SG8 MCU Series Data Sheet, Rev. 0
202
PRELIMINARY
Freescale Semiconductor