I2C; I2C Addressing - GE SBC330 3U VPX Hardware Reference Manual

2
5.7 I C
The MPC8641D provides two I
400 KHz. This speed is derived as a divisor of the MPX Bus/Platform speed, so be
aware that the divisor may need adjusting if the platform bus changes. Figure 5‐5
shows the I
Figure 5-4 I
5.7.1 I
I
I
shows the addresses used by the I
These are the byte addresses that would be used to write to/read from the device
on the bus (i.e. the 7‐bit device address, and the least significant bit set to '0' or '1'
as required).
Table 5-11 I2C Bus Addresses
38 SBC330 3U VPX Single Board Computer
2
C circuitry of the board.
2
C Architecture
2
C addressing
2
C devices have 8‐bit addresses. To write to I
2
C devices, the address is normally the write address + 1. The following table
Bus 0
Device Address (Hex)
Read
EEPROM A9
PEX8518 E1
PCIe Clock DD
Temp Sensor 99
BMM --
MC8641D
2
C buses, both of which are set up to run at
2
C devices, the LSB is 0; to read from
2
C devices connected to the on‐board I
Bus 1
Device
Write
A8 RTC
E0 SPD 1
DC SPD 2
98 PWR MAN
-- DS1682 ETI
00 MC8641D
2
C buses.
Address (Hex)
Read Write
A3 A2
A5 A4
A1 A0
FD FC
D7 D6
00
Publication No. SBC330-0HH/3