Lpc To Spi Bridge / Power-Management (U21); Bios Spi-Flash (U17) - Phytec phyCORE-Z500PT Hardware Bedienungsanleitung

phyCORE-Z500P(T)
7

LPC to SPI Bridge / Power-Management (U21)

Due to the information that most manufactures of Firmware-Hub's (FWH) will discontinue the
production of FWH with LPC interface, a LPC
bridge is realized inside the Altera EPM570 PLD.
A second function of this PLD is Power-Management.
7.1

BIOS SPI-Flash (U17)

The SPI-Flash at U17 hold the BIOS for the phyCORE-Z500P(T). It is accessed via the LPC
bridge realized inside the Altera EPM570 PLD. U17 can be populated with many different SPI-Flash
devices but only the following are supported at the moment.
Type
AT26DF081A
AT26DF160A
If a 2 MByte sized SPI-Flash is populated, the signal FWH_BSEL select between the upper/lower
bank. With this, a "backup-BIOS" is still available in the other bank.
To reflash the BIOS the tool "spiprog" is used, which you can find on the CD.
The on-board BIOS can be disabled by pulling down the signal FWH_EN which has an 10kOhm
pull-up at the phyCORE. This is useful to use a LPC-Flash as BIOS storage device.
Signal-Name
FWH_BSEL
FWH_EN
34
SPI bridge is used on the phyCORE-Z500P(T). This
Manufacturer
Atmel
Atmel
Description
BIOS bank select input
disable on board FWH
Size
1MByte
2MByte
on-board
Nr. @ X2 Type
circuit
23 I CMOS3.3
25 PU 10k Ohm I CMOS3.3
© PHYTEC Messtechnik GmbH 2009
SPI
Remark
L-732e_0