Datasheet

Serial Communications Interface (SCI)
MC68HC711D3 Data Sheet, Rev. 2.1
66 Freescale Semiconductor
Figure 6-1. SCI Transmitter Block Diagram
FE NF OR IDLE RDRF TC TDRE
SCSR INTERRUPT STATUS
SBK RWU RE TE ILIE RIE TCIE TIE
SCCR2 SCI CONTROL 2
TRANSMITTER
CONTROL LOGIC
TCIE
TC
TIE
TDRE
SCI Rx
REQUESTS
SCI INTERRUPT
REQUEST
INTERNAL
DATA BUS
PIN BUFFER
AND CONTROL
H(8)76543210L
10 (11) - BIT Tx SHIFT REGISTER
DDD1
PD1
TxD
SCDR Tx BUFFER
TRANSFER Tx BUFFER
SHIFT ENABLE
JAM ENABLE
PREAMBLE—JAM 1s
BREAK—JAM 0s
(WRITE ONLY)
FORCE PIN
DIRECTION (OUT)
SIZE 8/9
WAKE M T8 R8
SCCR1 SCI CONTROL 1
TRANSMITTER
BAUD RATE
CLOCK