Sonic Alert msm80154s, msm83c154s, msm85c154hvs user manual 108, Serial port mode, Timing chart

	Figure 4-29
108	Serial port (mode
	0) timing chart

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 S5 S6 S1 S2 S3 S4

ALE
WRITE TO SBUF
RXD	D0	D1	D2	D3	D4	D5	D6	D7

TXD

TERMINATE TRANSMISSION

TI

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 S5 S6 S1 S2 S3 S4

ALE

WRITE TO SCON

REN·RI

READ RXD

TXD

SHIFT-IN CLOCK

LOAD SBUF

TERMINATE TRANSMISSION

RI

MSM80C154S/83C154S/85C154HVS