PNX1500E NXP Semiconductors, PNX1500E Datasheet - Page 217
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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 10: Examples of I
PNX15XX_PNX952X_SER_N_4
Product data sheet
Size
2 kilobytes
16 kilobytes
32 kilobytes
64 kilobytes
Device
SUMMIT SMS8198
ATMEL 24C128
ATMEL 24C256
ATMEL 24C512
4.2 The Boot Commands and The Endian Mode
4.3 Details on I
2
C EEPROM Devices
When writing to an MMIO register address, there is no endian mode issue. The msbit
of the word ‘V’
SDRAM address there is an endian mode issue. Depending on the current endian
mode
DCS DRAM gate
To retrieve the boot script, the Boot module performs the following I
The interpretation of this sequence by 2048 bytes or smaller EEPROMs is:
Hence, for a 2048-byte or smaller EEPROM, the boot image must start at byte 1.
The interpretation of this sequence by 4096 bytes or larger EEPROMs is:
Hence, for a 4096-byte or larger EEPROM, the boot image must start at byte 0.
•
•
•
•
•
•
•
•
In little-endian mode, the MSB of ‘V’ (or the last read EEPROM byte of the word),
end up in memory byte address ‘A+3’ and LSB (or first read EEPROM byte), end
up at the byte address ‘a’.
In big-endian mode, the MSB of ‘V’ (or last read EEPROM byte), end up at the
byte address ‘A’ and the LSB (or first read EEPROM byte), end up at the byte
address ‘A+3’.
START, 10100000, wait-for-ack, 00000000, wait-for-ack, 00000000, wait-for-ack,
STOP
START, 10100001, wait-for-ack, <accept data byte, send ACK or STOP if done>.
Write a byte value 0 to address 0 (setting the next address-pointer to byte
address 1).
Read, starting from address 1.
Write a 0 byte-long sequence to address 0 (setting next address pointer to byte
address 0).
Read, starting from address 0.
(Section 4. on page
Write Protection
Coverage
Full Array
Full Array
Full Array
Full Array
2
(Table
C Operation
Rev. 4.0 — 03 December 2007
(Section 2.3 on page
2) end up as the msbit of the MMIO register. When writing to an
3-116), 32-bit words get written to memory through the
Address Protocol
1 byte
2 bytes
2 bytes
2 bytes
3-112) in one of these two ways:
PNX15xx/952x Series
Comment
Includes power-on reset for board
system reset generation
Tested
Chapter 6: Boot Module
© NXP B.V. 2007. All rights reserved.
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C transactions:
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