QUEUED SERIAL MODULE
M68HC16 Z SERIES
9-22
USER’S MANUAL
Figure 9-10 SCI Transmitter Block Diagram
LOOPS
WOMS
ILT
PT
PE
M
WAKE
TIE
TCIE
RIE
ILIE
TE
RE
RWU
SBK
TRANSMITTER
CONTROL LOGIC
PIN BUFFER
AND CONTROL
H (8) 7
6
5
4
3
2
1
0
L
10 (11)-BIT Tx SHIFT REGISTER
DDRQS (D7)
TxD
SCDR Tx BUFFER
TRANSFER Tx BUFFER
SHIFT ENABLE
JAM ENABLE
PREAMBLE—JAM 1's
BREAK—JAM 0's
FORCE PIN DIRECTION (OUT)
SIZE 8/9
PARITY
GENERATOR
TRANSMITTER
BAUD RATE
CLOCK
TC
TDRE
SCI Rx
REQUESTS
SCI INTERRUPT
REQUEST
FE
NF
OR
IDLE
RDRF
TC
TDRE
SCSR STATUS REGISTER
PF
INTERNAL
DATA BUS
RAF
TIE
TCIE
SCCR1 CONTROL REGISTER 1
0
15
15
0
START
STOP
OPEN DRAIN OUTPUT MODE ENABLE
(WRITE-ONLY)
16/32 SCI TX BLOCK
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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