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Peripheral Architecture
Example 1. Address Translation Example
The remote address 0400:0154h (or 0000 0054h) was translated to 8200:0054h on the DM643x (local) device in this example.
The translated address for packets received on the serial interface is determined as follows:
If (RX Packet Address < RX Address Map Size 1 Register) {
Translated Address = RX Packet Address +
RX Address Map Offset 1 Register
}else if (RX Packet Address < (RX Address Map Size 1 Register + RX Address Map Size 2 Register)) {
Translated Address = RX | Packet Address + |
|
| |
RX | Address | Map Offset | 2 Register - | |
RX | Address | Map Size | 1 | Register |
}else if (RX Packet Address < (RX Address Map Size 1 Register +
RX Address Map Size 2 Register + RX Address Map Size 3 Register)) {
Translated Address = RX Packet Address +
RX Address Map Offset 3 Register -
RX Address Map Size 1 Register -
RX Address Map Size 2 Register
}else if (RX Packet Address < (RX Address Map Size 1 Register +
RX Address Map Size 2 Register + RX Address Map Size 3 Register + RX Address Map Size 4 Register)) {
Translated Address = RX Packet Address +
RX Address Map Offset 4 Register -
RX Address Map Size 1 Register -
RX Address Map Size 2 Register -
RX Address Map Size 3 Register
}else {
Translated Address = 0x0
}
2.9Flow Control
The VLYNQ module includes flow control features. The VLYNQ module automatically generates flow control enable requests, /P/, when the RX/inbound FIFOs (FIFO1 and FIFO2) resources are consumed. The FIFOs can take up to 16
The remote device will begin transmitting idles, /I/, starting on the first byte boundary following reception of the request. When sufficient RX FIFO resources have been made available, a flow control disable request, /C/, is transmitted to the remote device. In response, the remote device will resume transmission of data.
See Appendix A.
SPRU938B | VLYNQ Port | 19 |
