LPC47N237-MD SMSC [SMSC Corporation], LPC47N237-MD Datasheet - Page 73

• Manufacturer Part Number: LPC47N237-MD
• Description: 3.3V I/O CONTROLLER FOR PORT REPLICATORS AND DOCKING STATIONS
• Manufacturer: SMSC [SMSC Corporation]

3.3v I/O Controller for Port Replicators and Docking Stations
Note 12.1
Note 12.2
SMSC DS – LPC47N237
SIRQ_CLKRUN_EN
“Change/Assertion” means either-edge change on any internal IRQs routed to the SIRQ block or
assertion of an internal DMA request by a device in LPC47N237. The “assertion” detection logic runs
asynchronously to the PCI Clock and regardless of the Serial IRQ mode; i.e., “continuous” or “quiet”.
The nCLKRUN signal is ‘1’ for at least two consecutive clocks before LPC47N237 asserts (‘0’) it.
KONA
0
1
Figure 12.1 – nCLKRUN System Implementation Example
INTERNAL INTERRUPTS/
Table 12.1 – LPC47N237 nCLKRUN Function
CHANGE/ASSERTION
DMA REQUESTS
NO CHANGE
MASTER
(Note 12.1)
DATASHEET
X
nCLKRUN
Page 73
PCI_CLK
TARGET
NCLKRUN
X
X
0
1
Assert nCLKRUN
(Central Resource)
GENERATOR
PCI CLOCK
(Note 12.2)
ACTION
None
None
None
Revision 0.3 (10-26-04)