Emerson ATCA-9305 Manuel D’Utilisation
Management Complex:
I2C Interface
4-9
I
2
C INTERFACE
The I
2
C interface consists of the MPC8548 initialization EEPROM, user (storage) NVRAM,
SO-CDIMM, and the Real-time Clock (RTC). The two Atmel two-wire serial EEPROMs on the
I
I
2
C interface consist of the Serial Clock (SCL) input and the Serial Data (SDA) bidirectional
lines.
Table 4-5:
I
2
C Device Addresses
The two EEPROMs store non-volatile information such as board, monitor, and operating sys-
tem configurations as well as customer specific items.
tem configurations as well as customer specific items.
Table 4-6:
MPC8548 NVRAM Memory Map
Note:
Both EEPROMs are write-protected.
MANAGEMENT PROCESSOR HEADER AND SERIAL PORT
JTAG/COP Interface (optional)
The management complex uses header P2 for debug purposes.
Table 4-7:
Serial Debug Connector, P2
I
2
C Device:
Address:
MPC8548 Initialization (EEPROM-2)
0xA0
User NVRAM (EEPROM-1)
0xA2
DDR2 SDRAM (SO-CDIMM)
0xA4
M41T00 RTC
0xD0
EEPROM:
Address Offset
(hex):
(hex):
Description:
Window
Size (bytes)
Size (bytes)
EEPROM-1
0xA2
(write
protected)
0xA2
(write
protected)
0x1FF0-0x1FFF
Boot verify secondary area (monitor)
16
0x1FE0-0x1FEF
Boot verify primary area (monitor)
16
0x1EE0-0x1FDF
Operating system parameters (monitor)
256
0x0000-x1EDF
User defined
7903
EEPROM-2
0xA0
(write
protected)
0xA0
(write
protected)
0x0900-0x1FFF
Emerson reserved area
5887
0x0800-0x08FF
Miscellaneous
256
0x07F0-0x07FF
Power-on Self-test (POST)
16
0x0000-0x07EF
User defined
2032
Pin:
Signal:
Description:
1
PQ_TDO
Test Data Output is the serial data output as well as test and
programming data.
programming data.
2
no connect
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