NCT6627UD Nuvoton Technology Corporation of America, NCT6627UD Datasheet - Page 161

• Manufacturer Part Number: NCT6627UD
• Manufacturer: Nuvoton Technology Corporation of America

Specifications of NCT6627UD

• Lead Free Status / Rohs Status: Supplier Unconfirmed

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.
14.2 IRQ/Data Frame
interrupt request. Then the host takes over and continues to pull the SERIRQ low.
IRQ/DATA FRAME
10
11
12
13
14
15
1
2
3
4
5
6
7
8
9
SIGNAL SAMPLED
Table 14-1 SERIRQ Sampling Periods
IRQ10
IRQ11
IRQ12
IRQ13
IRQ14
IRQ0
IRQ1
SMI#
IRQ3
IRQ4
IRQ5
IRQ6
IRQ7
IRQ8
IRQ9
SERIRQ SAMPLING PERIODS
# OF CLOCKS PAST
-152-
W83627UHG/NCT6627UD
START
11
14
17
20
23
26
29
32
35
38
41
44
2
5
8
Publication Release Date: October 26, 2010
H/W Monitor & SMI
EMPLOYED BY
Reserved
Keyboard
Reserved
UART B
UART A
Mouse
FDC
LPT
-
-
-
-
-
-
Revision 1.7