56
MVME4100 Single Board Computer Programmer’s Reference (6806800H19D)
Programming Details
Programming Details
4.5
I
2
C Device Addresses
A two-wire serial interface is provided by an I
2
C compatible serial controller integrated into
the MPC8548E. The MPC8548E I
2
C controller is used by the system software to read the
contents of the various I
2
C devices located on the MVME4100. The following table contains
the I
2
C devices used for the MVME4100 and their assigned device addresses.
NOTES:
1.
Each SPD defines the physical attributes of each bank or group of banks.
2. This is a dual address serial EEPROM.
3. The device address is user selectable using switches on the RTM. The recommended
address setting for the MVME4100 is $AA.
4.6
User Configuration EEPROM
The board provides two 64 KB dual address serial EEPROMs for a total of 128 KB user
configuration storage. These EEPROMs are hardwired to have device IDs as shown in
, and each device ID will not be used for any other function. Refer to
the
EEPROM Data Sheet
listed in
Appendix B, Related Documentation
, for additional
details.
Table 4-4
I2C Bus Device Addressing
I2C Bus
Address
Device
Address
A2 A1 A0
(binary)
Size (bytes) Device Function
Notes
$98
N/A
N/A
MAX6649 temperature sensor
-
$A0
000
256 x 8
SO-CDIMM SPD
1
$A4
010
65,536 x 8
User configuration
2
$A6
011
65,536 x 8
User configuration
2
$A8
100
8192 x 8
VPD (on-board system configuration)
2
$AA
101
8192 x 8
RTM VPD (off-board configuration)
2, 3
$AC
110
8192 x 8
XMCSpan VPD
-
$AE
111
-
Reserved
-
$D0
N/A
N/A
DS1375 real-time clock
-
Содержание MVME4100
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