Dma Channel Registers; Address Map - Digi NS7520B-1-C36 Hardware Reference Manual

FB write indicates fly-by peripheral-to-memory.
FB read indicates fly-by memory-to-peripheral.
MM indicates memory-to-memory.
DMA channels 3/5 and 4/6 can interface with external peripheral devices
using DMA handshake signals multiplexed through the GPIO pins in PORTA
and PORTC.
Channel
1
2
3
4
5
6
7
8
9
10
11
12
13
Table 49: DMA channel assignments

DMA channel registers

All registers are 32-bit unless otherwise noted.

Address map

The next table sows the address map for the DMA channel configuration registers.
Base address DMA channel peripheral
'hFF90 0000 Ethernet port 1 receiver
'hFF90 0080 Ethernet port 1 transmitter
'hFF90 00A0
'hFF90 00C0
'hFF90 00E0
'hFF90 0100
'hFF90 0120 SER channel 1 receiver
'hFF90 0140 SER channel 1 transmitter
'hFF90 0160 SER channel 2 receiver
'hFF90 0180 SER channel 2 transmitter
'hFF90 01A0
'hFF90 01C0
'hFF90 01E0
w w w . d i g i e m b e d d e d . c o m
D M A M o d u l e
Fly-by mode
FB write
FB read
FB write
FB read
FB write
FB read
MM
MM
MM
1 3 3