CS5535-UDCF AMD (ADVANCED MICRO DEVICES), CS5535-UDCF Datasheet - Page 150

• Manufacturer Part Number: CS5535-UDCF
• Manufacturer: AMD (ADVANCED MICRO DEVICES)

Specifications of CS5535-UDCF

• Operating Temperature (min): 0C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Lead Free Status / RoHS Status: Compliant

5.13.2
Start of Cycle (see Figure 5-39): The host asserts
LFRAME# for one or more clocks and drives a START
value on LAD[3:0], all peripherals stop driving the LAD[3:0]
signals even if in the middle of a transfer. The peripheral
must always use the last START value when LFRAME#
was active. On the clock after the START value, the host
de-asserts LFRAME#.
150
Cycle Protocol
LFRAME#
LAD[3:0]#
LFRAME#
LAD[3:0]#
LCLK
LCLK
31506B
START CYCTYP
Figure 5-40. Abort Mechanism Timing Diagram
START CYCTYP
1
Figure 5-39. Start of Cycle Timing Diagram
1
1
1
ADDR
ADDR
1 - 8
1 - 8
TAR
TAR
2
2
Abort Mechanism (see Figure 5-40): The host can cause
an abort on the LPC interface by driving LFRAME# active
with a START value of 1111b. The host must keep
LFRAME# active for at least four consecutive clocks and
drive LAD[3:0] to 1111b no later than the fourth clock after
LFRAME# goes active. The host must drive LFRAME#
inactive for at least one clock after an abort.
An abort typically occurs on SYNC timeouts.
Too many
Syncs causes
Timeout
SYNC
SYNC
1 - n
AMD Geode™ CS5535 Companion Device Data Book
DATA
2
Peripheral must
Stop driving
TAR
2
START
Chip set will
drive high
1
Low Pin Count Port