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Peripheral Architecture
DM643x VLYNQ Module:
4C00 : 0054h
Initial address at the slave configuration bus
0000 : 0054h
Initial address [25:0] at the slave configuration bus interface
subtract
0000 : 0000h
TX address map register (there is no need to change the reset value of the
DM643x device for this register)
0000 : 0054h
Remote VLYNQ Module:
0000 : 0054h
Initial address from the RX serial interface
compare
0000 : 0100h
RX address map size 1 register
0000 : 0054h
add
0800 : 0000h
RX address map offset 1 register
0800 : 0054h
Translated address to remote device
The local address 4C00:0054h (or 0000 0054h) was translated to 0800:0054h on the remote VLYNQ
device in
Table 3
.
Table 3
shows the address map register configuration when the DM643x device is receiving data from the
remote device.
Table 3. Address Translation Example (Single Mapped Region)
Register
DM643x VLYNQ Module
Remote VLYNQ Module
TX Address Map
Do not care
0400 : 0000h
RX Address Map Size 1
0000 : 0100h
Do not care
RX Address Map Offset 1
0200 : 0000h
Do not care
RX Address Map Size 2
0000 : 0100h
Do not care
RX Address Map Offset 2
8200 : 0000h
Do not care
Remote VLYNQ Module:
0400 : 0154h
Initial address at the slave configuration bus for the remote device
subtract
0400 : 0000h
TX address map register
0000 : 0154h
Translated address to remote device via serial interface
DM643x VLYNQ Module:
0000 : 0154h
Initial address from the RX serial interface
compare
0000 : 0100h
RX address map size 1 register
0000 : 0154h
The RX packet address is greater than the value in the RX address map size 1
register
compare
0000 : 0200h
RX address map size 1 re RX address map size 2
Since the RX packet address < the RX address map size 1 re
RX address map size 2 register
add
8200 : 0000h
RX address map offset 2 register
subtract
0000 : 0100h
RX address map size 1 register
8200 : 0054h
Translated address to DM643x device
VLYNQ Port
18
SPRU938B – September 2007
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