W83627UHG Nuvoton Technology Corporation of America, W83627UHG Datasheet - Page 158

• Manufacturer Part Number: W83627UHG
• Description: IC I/O CONTROLLER 128-QFP
• Manufacturer: Nuvoton Technology Corporation of America

Specifications of W83627UHG

• Applications: PC's, PDA's
• Interface: LPC
• Voltage - Supply: 3.3V, 5V
• Package / Case: 128-XFQFN
• Mounting Type: Surface Mount
• Pin Count: 128
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

After all IRQ/Data Frames have completed, the host controller will terminates SERIRQ with a Stop
frame. Only the host controller can initiate the Stop Frame by driving SERIRQ low for 2 or 3 clocks. If
the Stop Frame is low for 2 clocks, the Sample mode of next SERIRQ cycle’s Sample mode is the
Quiet mode. If the Stop Frame is low for 3 clocks, the Sample mode of next SERIRQ cycle is the
Continuous mode.
Please see the diagram below for more details.
PCICLK
SERIRQ
H=Host Control
Note:
14.3 Stop Frame
Driver
IRQ/DATA FRAME
1. There may be none, one or more Idle states during the Stop Frame.
2. The Start Frame pulse of next SERIRQ cycle may or may not start immediately after the
32:22
S
18
19
20
21
turn-around clock of the Stop Frame.
Figure 14-2 Stop Frame Timing with Host Using 17 SERIRQ Sampling Period
FRAME
None
IRQ14
R
T
R=Recovery
S
IRQ15
IRQ15
FRAME
SIGNAL SAMPLED
R
Unassigned
INTA#
INTB#
INTC#
INTD#
T
SERIRQ SAMPLING PERIODS
S
IOCHCK#
None
FRAME
R
T=Turn-around
-143-
T
# OF CLOCKS PAST
I
1
STOP FRAME
Host Controller
START
STOP
H
53
56
59
62
95
Publication Release Date: March 24, 2008
R
S=Sample
T
W83627UHG
NEXT CYCLE
EMPLOYED BY
START
-
-
-
-
-
Revision 1.44
I= Idle.
2