Intel CONTROLLERS 413808 - Manual (Page 744)

Intel ® 413808 and 413812—PMON Unit
Intel ® 413808 and 413812 I/O Controllers in TPER Mode
Developer’s Manual October 2007
744 Order Number: 317805-001US
16.5.2.1 Indicator Output
The PMON OUT pin is a shared indicator output pin. The resulting signal allows external
elements (OS, drivers, logic analyzer, etc.) to be aware of indicators without having to
rely on interrupts.
For 4138xx, the
PMON OUT function is multiplexed onto the GPIO7 pin. When the
PMON Indicator Output Enable bit is set in the “PMON Feature Enable Register -
PMONEN” , the PMON output function overrides the GPIO7 setting in the Section
15.2.1, “GPIO Output Enable Register — GPOE” on page 725 and Section 15.2.3, “GPIO
Output Data Register — GPOD” on page 728 .
Warning:
Since GPIO7 could be used for other purposes, care must be taken when enabling the
PMON Indicator Output.
Note: Indicator and Interrupt Enables are located in the “PMON Command Register 0-7 -
PMON_CMD[0:7]” on page 749
Global Indicator and Interrupt Enables are located in the “PMON Feature Enable
Register - PMONEN” on page 746
16.5.2.2 Interrupt Output
An internal interrupt is delivered to the Interrupt Control Unit when:
• Interrupts are enabled in the “PMON Feature Enable Register - PMONEN”
(PMONEN[0]=1).
• One or more of the interrupt sources are enabled within the individual counter via
the indicator enable bits.
• The interrupt enable bit is set within the individual counter
• One or more of the enabled indicators is true
This sets the internal interrupt generated bit in the PMON STAT register and asserts the
PMON interrupt input to the Interrupt control unit.
Figure 118. Indicator Tree
Status Register 0
+08H
Overflow
Underflow
Event
26
Command
Trigger
Event
25
Threshold
Event
24
OU Indicator
Enable
CT Indicator
Enable
TH Indicator
Enable
Counter 0
Counter 0
Counter 1
.. .
Counter 0
Counter 1
.. .
Interrupt
Indicator Output
Global Indicator
Output Enable
Global Interrupt
Enable
OU Indicator
Enable
CT Indicator
Enable
TH Indicator
Enable
Interrupt
Enable
Indicator Output
Enable
Indicator Output
( GPIO[7])
Interrupt
Q
Q
SET
CLR
S
R
Interrupt Status
Write-to-Clear
Enables located in
Command Register
+04H
Counter N
Counter N
B6320-01