PNX1500E NXP Semiconductors, PNX1500E Datasheet - Page 207
PNX1500E
Manufacturer Part Number
PNX1500E
Description
Manufacturer
NXP Semiconductors
Datasheet
1.PNX1500E.pdf
(828 pages)
Specifications of PNX1500E
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PNX15XX_PNX952X_SER_N_4
Product data sheet
2.2.3 Boot Control/State Machine
2.3 The Boot Command Language
specification. Depending on the state of the BOOT_MODE[2] pin the operating speed
of the I
derives the 100 KHz or 400 KHz clock from 27 MHz input clock.
The I
formats.
The boot control/state machine is in fact a mini processor. It fetches commands from
the boot scripts or the content of the EEPROM, decodes the command and
processes the address or the data depending on the command as documented
Section
and can later on be used by the I
The boot script consists of a sequence of 32-bit commands. These commands
constitute the language understood by the boot module. The valid commands are:
•
•
•
•
A write to a given 32-bit value at a given address (useful for writing device control
registers).
A write to an arbitrary length list of 32-bit values starting at a given address
(useful for filling memory with a processor binary image).
A delay by a given number of 27 MHz clock ticks (useful to wait for completion of
an action, such as a PLL frequency change, or a device DMA operation).
Terminate Boot.
2
C interface can handle EEPROMs with both 1-byte and 2-byte addressing
2
C interface is 400 KHz, if set to ‘1’, or 100 KHz, if set to ‘0’. The I
2.3. When an end of boot command is reached, the I
Rev. 4.0 — 03 December 2007
2
C module.
PNX15xx/952x Series
Chapter 6: Boot Module
2
C interface is released
© NXP B.V. 2007. All rights reserved.
2
C master
6-207
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