cs5535 National Semiconductor Corporation, cs5535 Datasheet - Page 140

• Manufacturer Part Number: cs5535
• Description: Geode Cs5535 Companion Multi-function South Bridge
• Manufacturer: National Semiconductor Corporation

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LPC Port Functional Description
START: Start pulse width can be from 4-8 cycles, the width is determined by the value of START width.
REC:
TAR:
SAMP: Sample, slave drives low or leaves high.
REC:
TAR:
REC:
TAR:
Recover, host actively drives SERIRQ high.
Turn Around Cycle. Dead cycle to prevent bus contention.
Recover, slave actively drives SERIRQ high if driven low during sample.
Turn Around Cycle. Dead cycle to prevent bus contention.
Recover, host actively drives SERIRQ high.
Turn Around Cycle. Dead cycle to prevent bus contention.
Continues Mode:
Quiet Mode:
SERIRQ
IRQ Clear:
Drivers
LCLK
IRQ Set:
Figure 4-42. Start Frame Waveform
Figure 4-44. Stop Frame Waveform
Figure 4-43. IRQ Frame Waveform
SERIRQ
SERIRQ
Drivers
Drivers
LCLK
SERIRQ
SERIRQ
Driver
Driver
LCLK
(Continued)
Slave
Host
or
Host Controller
START
SAMP
SAMP
STOP
140
Host Controller
IRQX
STOP
Host Controller
None
REC
REC
REC
REC TAR
TAR
None
TAR
None
REC
TAR
None
TAR
None
Revision 0.8