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MVME3100 Single Board Computer Installation and Use (6806800M28C)
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7.4 Local Bus Controller Chip Select Assignments
The following table shows local bus controller (LBC) bank and chip select assignments for the
MVME3100 board.
7.5 Two-Wire Serial Interface
A two-wire serial interface for the MVME3100 is provided by an I
2
C compatible serial controller
integrated into the MPC8540. The MPC8540 I
2
C controller is used by the system software to
read the contents of the various I
2
C devices located on the MVME3100. The following table
contains the I
2
C devices used for the MVME3100 and their assigned device addresses.
Table 7-3 LBC Chip Select Assignments
LBC Bank/
Chip Select Local Bus Function Size
Data Bus
Width Notes
0 Boot Flash bank 32MB - 128MB 32 bits
1
1 Optional second Flash bank 32MB - 128MB 32 bits
1
2 Control/Status registers 64 KB 32 bits
2
3 Quad UART 64 KB 8 bits
4 32-bit timers 64 KB 32 bits
3
5-7 Not used
1. Flash bank size determined by VPD flash packet.
2. Contro/Status registers are byte read and write capable.
3. 32-bit timer registers are byte readable, but must be written as 32 bits.
Table 7-4 I2C Bus Device Addressing
I2C Bus
Address
Device Address
A2 A1 A0
(binary) Size (bytes) Device Function Notes
$90 000 N/A DS1621 temperature sensor