W83627EG Nuvoton Technology Corporation of America, W83627EG Datasheet - Page 198

• Manufacturer Part Number: W83627EG
• Description: IC I/O CONTROLLER 128-QFP
• Manufacturer: Nuvoton Technology Corporation of America

Specifications of W83627EG

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

PCICLK
SER IRQ
Drive Source
H=Host Control
Note:
1. The Start Frame pulse can be 4-8 clocks wide.
2. The first clock of Start Frame is driven low by the W83627EHF/EHG/EF/EG because IRQ1 of the
Once the Start Frame has been initiated, the W83627EHF/EHG/EF/EG must start counting frames
based on the rising edge of the start pulse. Each IRQ/Data Frame has three clocks: the Sample phase,
the Recovery phase, and the Turn-around phase.
During the Sample phase, the W83627EHF/EHG/EF/EG drives SERIRQ low if the corresponding IRQ
is active. If the corresponding IRQ is inactive, then SERIRQ must be left tri-stated. During the Recovery
phase, the W83627EHF/EHG/EF/EG device drives the SERIRQ high. During the Turn-around phase,
the W83627EHF/EHG/EF/EG device leaves the SERIRQ tri-stated. The W83627EHF/EHG/EF/EG
starts to drive the SERIRQ line from the beginning of "IRQ0 FRAME" based on the rising edge of
PCICLK.
The IRQ/Data Frame has a specific numeral order, as shown in Table 13.1.
13.2 IRQ/Data Frame
W83627EHF/EHG/EF/EG needs an interrupt request. Then the host takes over and continues to
pull the SERIRQ low.
IRQ1
SL
or
H
2
SL=Slave Control
START
Host Controller
START FRAME
H
1
Table 13.1 SERIRQ Sampling Periods
R
T
W83627EHF/EF, W83627EHG/EG
IRQ0 FRAME
-187-
S
None
R=Recovery
R
T
IRQ1 FRAME
S
IRQ1
Publication Release Date: April 7, 2009
T=Turn-around
R
T
SMI# FRAME
S
None
R
T
Version 1.94
S=Sample