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Peripheral Architecture

DM644x VLYNQ Module:

0C00 : 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

DM644x 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 0C00 : 0054h (or 0000 0054h) was translated to 0800 : 0054h on the remote VLYNQ

device in Table 4 .

Table 4 illustrates the address map register configuration when the DM644x device is receiving data from

the remote device.

Table 4. Address Translation Example (Single Mapped Region)

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

DM644x 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

compare 0000 : 0200h RX address map size 1 register + RX address map size 2

Since the RX packet address < the RX address map size 1 register +

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 DM644x device

SPRUE36A – September 2007 VLYNQ Port 19

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