Sonic Alert msm85c154hvs User Manual
INTERNAL SPECIFICATIONS
109
Figure 4-30
Serial port (mode 0) timing and corresponding basic MSM80C154S/
MSM83C154S timing
MSM83C154S timing
XTAL1
ALE
OUTPUT:
READ RXD
INPUT:
TXD
(SHIFT CLOCK)
RXD
(DATA OUTPUT)
S1
S2
S3
S4
S5
S6
S1
S2
S3
S4
S5
S6
TXD
(SHIFT CLOCK)