PNX1500E NXP Semiconductors, PNX1500E Datasheet - Page 120
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PNX1500E
Manufacturer Part Number
PNX1500E
Description
Manufacturer
NXP Semiconductors
Datasheet
1.PNX1500E.pdf
(828 pages)
Specifications of PNX1500E
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Table 4: Semaphore MMIO Registers
6. System Related Information for TM3260
Table 5: Interrupt Source Assignments
PNX15XX_PNX952X_SER_N_4
Product data sheet
31:0
Offset 0x06 383C
31:0
SOURCE NAME
PCI_INTA_N
PCI_GNT_A_N
PCI_GNT_B_N
PCI_REQ_A_N
PCI_REQ_B_N
TIMER1
TIMER2
Bits
Symbol
SEMAPHORE14
SEMAPHORE15
6.1 Interrupts
SOURCE
NUMBER
0
1
2
3
4
5
6
SEMAPHORE15
This section contains information on how the internal TM3260 resources like its
interrupt lines or timers have been assigned or used in the PNX15xx/952x Series
system. More specific details on how to program or on the exact behavior of these
resources is found in [1].
A fundamental aspect of PNX15xx/952x Series system is to provide hardware
modules (or hardware accelerators) that relieve the TM3260 CPU for other video/
audio processing. These modules are mainly internal bus DMA masters. Thus once
programmed by the TM3260 they only require limited CPU processing power. For
example the video module only requires the TM3260 to update the pointers to the
next frame 60 times per seconds. An interrupt line is used to signal TM3260 of that
need.
The TM3260 Vectored Interrupt Controller (VIC) provides 64 inputs for interrupt
request lines. The interrupt controller prioritizes and maps the multiple requests from
the several PNX15xx/952x Series modules onto successive interrupt requests to the
TM3260 execution unit.
Table 5
recommended operating mode (edge or level triggered). Note that there are a total of
7 possible external pins to assert interrupt requests. Only PCI_INTA_N is a dedicated
pin for external interrupts. The other pins may be used for other functionality. The first
5 interrupt sources, i.e. source 0 through 4, are asserted by active low signal
conventions, i.e. a zero level or a negative edge asserts a request. The remaining two
external interrupt lines, i.e. source 26 and 27, like all the other regular interrupt lines,
operate with active high signalling conventions.
Acces
s
R/W
R/W
INTERRUPT
OPERATING MODE
level
level
level
level
level
edge
edge
shows the assignment of modules to interrupt source numbers, as well as the
…Continued
Value
0
0
Rev. 4.0 — 03 December 2007
Description
Same as semaphore0 register.
Same as semaphore0 register.
SOURCE DESCRIPTION
External PCI INTA interrupt used by the host CPU. Active
LOW
Direct external interrupt input line, active LOW
Direct external interrupt input line, active LOW
Direct external interrupt input line, active LOW
Direct external interrupt input line, active LOW
General purpose internal TM3260 timer.
General purpose internal TM3260 timer.
Chapter 3: System On Chip Resources
PNX15xx/952x Series
© NXP B.V. 2007. All rights reserved.
3-120
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