User's Manual

MSM80C154S/83C154S/85C154HVS
108
Figure 4-29 Serial port (mode 0) timing chart
D1
WRITE TO SBUF RXD TXD ALE
S4 S5 S6 S1 S2 S3
TERMINATE TRANSMISSION TI
S4 S5 S6 S1 S2 S3 S4 S5 S6 S1 S2 S3 S4 S5 S6 S1 S2 S3
D2 D3 D4 D5 D6
S4 S5 S6 S1 S2 S3 S4 S5 S6 S1 S2 S3 S4 S5 S6 S1 S2 S3 S4 S5 S6 S1 S2 S3 S4 S5 S6 S1 S2 S3 S4 S5 S6 S1 S2 S3 S4
WRITE TO SCON REN·RI TXD ALE
S4 S5 S6 S1 S2 S3
TERMINATE TRANSMISSION RI
S4 S5 S6 S1 S2 S3 S4 S5 S6 S1 S2 S3 S4 S5 S6 S1 S2 S3 S4 S5 S6 S1 S2 S3 S4 S5 S6 S1 S2 S3 S4 S5 S6 S1 S2 S3 S4 S5 S6 S1 S2 S3 S4 S5 S6 S1 S2 S3 S4 S5 S6 S1 S2 S3 S4
READ RXD LOAD SBUF SHIFT-IN CLOCK
D7D0