MC68HC08AZ0 Datasheet, PDF (192/444 Pages) Motorola, Inc – Advance Information

Freescale Semiconductor, Inc.
Serial Communications Interface Module (SCI)
Table 3. SCI receiver I/O register summary
Register name
Bit 7 6
5
4
3
2
1 Bit 0 Addr.
SCI control register 1 (SCC1)LOOPS ENSCI TXINV M WAKE ILTY PEN PTY $0013
SCI control register 2 (SCC2) SCTIE TCIE SCRIE ILIE TE RE RWU SBK $0014
SCI control register 3 (SCC3) R8 T8 DMARE DMATE ORIE NEIE FEIE PEIE $0015
SCI status register 1 (SCS1) SCTE TC SCRF IDLE OR NF FE PE $0016
SCI status register 2 (SCS2)
BKF RPF $0017
SCI data register (SCDR)
$0018
SCI baud rate register (SCBR)
SCP1 SCP0
SCR2 SCR1 SCR0 $0019
= Unimplemented
R = Reserved
• After every start bit
• After the receiver detects a data bit change from ‘1’ to ‘0’ (after the
majority of data bit samples at RT8, RT9, and RT10 returns a valid
‘1’ and the majority of the next RT8, RT9, and RT10 samples
returns a valid ‘0’).
PTE1/RxD
SAMPLES
RT
CLOCK
RT CLOCK
STATE
RT CLOCK
RESET
MC68HC08AZ0
190
START BIT
START BIT
QUALIFICATION
START BIT
DATA
VERIFICATION SAMPLING
Figure 4. Receiver data sampling
Serial Communications Interface Module (SCI)
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LSB
12-sci
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