MULTICHANNEL COMMUNICATION INTERFACE
M68HC16 Z SERIES
10-14
USER’S MANUAL
Figure 10-5 SCI Transmitter Block Diagram
MCCI SCI TX BLOCK
OPEN DRAIN OUTPUT MODE ENABLE
PARITY
BREAK — JAM 0’S
SCCR1 (CONTROL REGISTER 1)
0
LOOPS
ILT
TRANSMITTER
TXD
BAUD RATE
CLOCK
TRANSFER TX BUFFER
SHIFT ENABLE
JAM ENABLE
PREAMBLE — JAM 1’S
PIN BUFFER
AND CONTROL
L
0
1
2
3
4
5
6
7
(8)
H
STOP
10 (11) - BIT TX SHIFT REGISTER
START
MDDR7
MDDR5
FORCE PIN
DIRECTION (OUT)
SCDR TX BUFFER
INTERNAL
DATA BUS
GENERATOR
15
0
WOMS
PT
PE
M
WAKE
TIE
TCIE
RIE
ILIE
TE
RE
RWU
SBK
SCSR (STATUS REGISTER)
15
0
TDRE
TC
RDRF
RAF
IDLE
OR
NF
FE
PF
SIZE 8/9
(WRITE ONLY)
TIE
TCIE
TC
TDRE
SCI RX
REQUESTS
SCI INTERRUPT
REQUEST
TRANSMITTER CONTROL LOGIC
F
re
e
sc
a
le
S
e
m
ic
o
n
d
u
c
to
r,
I
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
c
.
..