PNX1501E NXP Semiconductors, PNX1501E Datasheet - Page 139
PNX1501E
Manufacturer Part Number
PNX1501E
Description
Digital Signal Processors & Controllers (DSP, DSC) MEDIA PROCESSOR PNX15XX/266MHZ
Manufacturer
NXP Semiconductors
Datasheet
1.PNX1501E.pdf
(819 pages)
Specifications of PNX1501E
Product
DSPs
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Package / Case
SOT-795
Minimum Operating Temperature
0 C
Lead Free Status / Rohs Status
Details
Other names
PNX1501E,557
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Figure 2:
SYS_RST_OUT_N
Watchdog_count
watchdog_reset
sys_rst_out_n
clk_dtl_mmio
Watchdog in Non Interrupt Mode
peri_rst_n
1: The watchdog count register is programmed
2: The count is happening
3: The count reaches the programmed value and a watchdog reset is issued
4: Both the internal and the external resets are asserted
2.2.2 The Interrupt Mode
0
The following
In this mode, the watchdog timer generates first an interrupt to the TM3260 before a
PNX15xx Series system reset is generated (when a time-out occurs because the
TM3260 does not answer in time to the interrupt). The sequence of operations is
similar to the non interrupt mode.
First TM3260 CPU writes a value different than 0x0 to the WATCHDOG_COUNT
MMIO register. This starts an internal counter from the value 0x0. When the internal
counter reaches the WATCHDOG_COUNT value an interrupt, SOURCE 42 (see
Section 6.2 on page
started. If this second counter reaches the value previously stored into the
INTERRUPT_COUNT MMIO register then a PNX15xx Series system reset is
asserted. The reset follows then the regular software reset timing,
TM3260 CPU clears the pending interrupt by writing to the INTERRUPT_CLEAR
MMIO register, then the PNX15xx Series system reset is not generated.
The following summarizes the sequence of operations
Remark: A write of any nonzero value other than the current value will reset the count.
However this is not intended to be used as such.
1
1. Enable the watchdog interrupt. This includes proper set-up of TM3260 internal
2. Initialize the INTERRUPT_COUNT MMIO register with the maximum interrupt
3. Start the first counter by writing a nonzero value to the WATCHDOG_COUNT
4. A write with 0x0 value to the WATCHDOG_COUNT MMIO register will stop the
interrupt controller[1] as well as an enable of the INTERRUPT_ENABLE MMIO
register.
latency authorized before a PNX15xx Series reset is asserted.
MMIO register.
count. However this is not intended to be used as such.
1
2
Figure 2
Rev. 2 — 1 December 2004
3
3-14) is asserted. From here a second internal counter is
pictures the events.
4
5
2
//
//
//
//
//
FD
FE
© Koninklijke Philips Electronics N.V. 2002-2003-2004. All rights reserved.
FF
3
PNX15xx Series
Section
0
Chapter 4: Reset
4
3.2. If the
4-5
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