W83627UHG Nuvoton Technology Corporation of America, W83627UHG Datasheet - Page 157

• 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

14.2 IRQ/Data Frame
Once the Start Frame has been initiated, the W83627UHG 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 W83627UHG 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 W83627UHG device drives the SERIRQ high. During the Turn-around phase, the W83627UHG
device leaves the SERIRQ tri-stated. The W83627UHG 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 14-1.
IRQ/DATA FRAME
32:22
10
11
12
13
14
15
16
17
18
19
20
21
1
2
3
4
5
6
7
8
9
SIGNAL SAMPLED
Table 14-1 SERIRQ Sampling Periods
Unassigned
IOCHCK#
IRQ10
IRQ11
IRQ12
IRQ13
IRQ14
IRQ15
INTC#
INTD#
INTA#
INTB#
IRQ0
IRQ1
SMI#
IRQ3
IRQ4
IRQ5
IRQ6
IRQ7
IRQ8
IRQ9
SERIRQ SAMPLING PERIODS
-146-
# OF CLOCKS PAST
START
11
14
17
20
23
26
29
32
35
38
41
44
47
50
53
56
59
62
95
2
5
8
W83627UHG
EMPLOYED BY
Keyboard
UART B
UART A
Mouse
FDC
LPT
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-