Table of Contents
Advertisement
Programming Details
2
Device Function
Memory SPD (On-board. Banks A and B.)
Memory SPD (On mezzanine. Banks C and D.) 256 x 8
IPMC VPD
GT-64260B Fixed Initialization
Configuration VPD
User VPD
Not Used
Not Used
DS1621 Temperature Sensor
2-6
contained on the MVME5500 board, along with the SPD EEPROMs, to
further initialize the memory controller and other interfaces. For additional
details regarding the GT-64260B two-wire serial controller operation, refer
to the GT-64260B System Controller for PowerPC Processors Data Sheet,
listed in
Appendix B, Related
Table 2-3
shows the I2C devices used for the MVME5500 and the assigned
device IDs.
Table 2-3. I2C Bus Device Addressing
Notes
1. Each SPD defines the physical attributes of each bank or
group of banks, that is, if both banks of a group are
populated, they will be the same speed and memory size.
2. This device can be write-protected by either setting the
EEPROM_WP bit of SSR2 or by placing a jumper on the
EEPROM write protect header. The hardware jumper
mechanism always takes precedence over the software
setting. For 8KB sized parts, only the upper 2KB are write-
protectable.
3. This is a 2-byte address serial EEPROM (AT24C64).
Documentation.
Device
Address
Size
(A2A1A0)
256 x 8
000b
001b
256 x 8
010b
256 x 8
011b
8K x 8
100b
8K x 8
101b
NA
110b
NA
111b
NA
000b
Computer Group Literature Center Web Site
I2C BUS
Address
Notes
$A0
1, 2
$A2
1
$A4
$A6
2
$A8
2, 3
$AA
2, 3
$AC
$AE
$90
Advertisement
Table of Contents
