pnx1500 NXP Semiconductors, pnx1500 Datasheet - Page 206
pnx1500
Manufacturer Part Number
pnx1500
Description
Pnx15xx Series Connected Media Processor
Manufacturer
NXP Semiconductors
Datasheet
1.PNX1500.pdf
(828 pages)
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Philips Semiconductors
Volume 1 of 1
Table 1: The Boot Modes
PNX15XX_SER_3
Product data sheet
BOOT_MODE
Bits
3
2
1:0
GPIO
pins
3
2
1:0
…Continued
Default Function
0x0
0x1
0x3
The default state of the BOOT_MODE[3:0] pins may be determined by the internal
pull-ups and pull-downs presents in the I/Os of PNX15xx Series. However the
BOOT_MODE[7:4] pins must be pulled up or down at board level to ensure a proper
boot function.
CAS_LATENCY DDR SDRAM devices support different types of CAS latencies.
ROM_WIDTH/
IIC_FASTMODE
BOOT_MODE
Rev. 3 — 17 March 2006
Description
However they do not support all the combinations. PNX15xx
Series offers the possibility to program the MMI (and therefore the
DDR SDRAM devices) with the appropriate CAS latency at boot
time. This is crucial for standalone boot from Flash memories
devices since 8 Kilobytes of data is stored into the main memory
during the execution of the boot scripts.
0 - 2.5 clock periods
1 - 3 clocks periods
This pin has a dual functional mode:
If BOOT_MODE[1:0] = “00”, “01”, or “10” (Boot from Flash
memory)
0 - 8-bit data wide ROM
1 - 16-bit data wide ROM
If BOOT_MODE[1:0] = “11” (Boot from I
0 - 100 KHz
1 - 400 KHz
The main boot mode is determined as follows:
00 - Set up the system and start the TM3260 CPU from a 8- or 16-
bit NOR Flash memory or ROM attached to the PCI-XIO bus.
01 - Set up the system and start the TM3260 CPU from a 8- or 16-
bit NAND Flash memory or ROM attached to the PCI-XIO bus.
10 - Set up the PNX15xx Series system in host-assisted mode
and allow the host CPU to finish the configuration of the PNX15xx
Series system and start the TM3260 CPU.
11 - Boot from an I
EEPROMs of 2 to 64 Kilobytes are supported. The entire system
can be initialized in a custom fashion by the boot commands
contained in the EEPROM. This mode can be used for standalone
or host-assisted boot mode when the other internal boot scripts
are not meeting the specific requirements of the application. In
this mode the boot script is in the EEPROM. Refer to
for further details on the EEPROM content.
2
C EEPROM attached to the I
© Koninklijke Philips Electronics N.V. 2006. All rights reserved.
PNX15xx Series
Chapter 6: Boot Module
2
C EEPROM)
2
C interface.
Section 2.3
6-3
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