P R E L I M I N A R Y
PB=0
PB=1
PB=0
PB=1
PB=0
PB=1
PB=0
PB=0
DR/DT=0 DR/DT=0
DR/DT=1
DR/DT=0
DR/DT=1
DR/DT=0
DR/DT=1 DR/DT=0
SDEN
SCLK
SDATA
Poll SSS for
PB=0
Poll SSS for
PB=0
Poll SSS for
PB=0
Write to SSD
Write to SSC,
bit DE=1
Write to SSD
Write to SSD
Write to SSC,
bit DE=0
Figure 11. Synchronous Serial Interface Multiple Write
PB=0
DR/DT=0
PB=0
DR/DT=1
PB=1
DR/DT=0
PB=1
DR/DT=0
PB=0
DR/DT=1
PB=1
DR/DT=0
PB=0
DR/DT=1
PB=0
DR/DT=0
SDEN
SCLK
SDATA
Poll SSS for
PB=0
Poll SSS for
PB=0
Poll SSS for
PB=0
Write to SSD
Read from SSR
(dummy)
Read from
SSR
Write to SSC,
bit DE=0
Read from SSR
Write to SSC,
bit DE=1
Figure 12. Synchronous Serial Interface Multiple Read
Am186/188EM and Am186/188EMLV Microcontrollers
49