NS7520B-1-I46 Digi International, NS7520B-1-I46 Datasheet - Page 152

• Manufacturer Part Number: NS7520B-1-I46
• Description: IC ARM MICROPROCESSOR 177BGA
• Manufacturer: Digi International
• Series: NET+ARM®r

Specifications of NS7520B-1-I46

• Applications: Network Processor
• Core Processor: ARM7
• Program Memory Type: External Program Memory
• Controller Series: -
• Ram Size: External
• Interface: EBI/EMI, Ethernet, DMA, SPI, UART
• Number Of I /o: 16
• Voltage - Supply: 1.4 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 177-LFBGA
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

1 4 0
D M A c h a n n e l r e g i s t e r s
Table 50: DMA Control register bit definition
REQ continued
D22
D21
D20
D19:18
Bits
N/A
R/W
R/W
N/A
Access
N S 7 5 2 0 H a r d w a r e R e f e r e n c e , R e v G 9 / 2 0 0 7
Reserved
SINC_
DINC_
Reserved
Mnemonic
N/A
0
0
N/A
Reset
DMA channels 4/6 interface with an external peripheral
using handshaking signals multiplexed through PORTC.
These bits should not be set in any channels other than
DMA 3, 4, 5, or 6.
N/A
Source address increment
0
1
Controls whether the source address pointer is incremented
after each DMA transfer. The DMA controller uses this bit
in all modes when referring to a memory address. This bit
is ignored when the source is a fly-by port.
Destination address increment
0
1
Controls whether the destination address pointer is
incremented after each DMA transfer. The DMA controller
uses this bit in all modes when referring to a memory
address. This bit is ignored when the destination is a fly-by
port.
For memory-to-memory operation with
is written to the specified destination address and all
subsequent data are written are written to the specified
destination address+4.
N/A
Description
When REQ is set to 1 in DMA channel 4, that channel
in DMA channel 6, DMA channel 6 is tied to the
external DMA port through PORTC.
is tied to the external DMA port through PORTC, no
matter the REQ bit setting in DMA channel 6.
Increment source address pointer
Do not increment source address pointer
Increment destination address pointer
Do not increment destination address pointer
When REQ is set to 0 in DMA channel 4 and set to 1
DINC_=0
, the data