NS7520B-1-C36 Digi International, NS7520B-1-C36 Datasheet - Page 153

• Manufacturer Part Number: NS7520B-1-C36
• Description: IC ARM MICROPROCESSOR 177BGA
• Manufacturer: Digi International
• Series: NET+ARM®r

Specifications of NS7520B-1-C36

• 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

Table 50: DMA Control register bit definition
D17:16
D15:10
D09:00
Bits
R/W
R
R
Access
SIZE
STATE
INDEX
Mnemonic
0
0
0
Reset
Data operand size
00
01
10
11
Used to define the size of each DMA transaction when the
DMA controller is configured for external request mode
(DMA channel 3 only) or memory-to-memory DMA
mode.
Current DMA channel state (shown in binary)
000000 — IDLE
000001 — Load source buffer address
000100 — Load destination buffer address
001000 — First operand
010000 — Memory-to-memory second operand
100000 — Update buffer description
Describes the current state of the DMA controller state
machine.
Current DMA channel buffer descriptor index
Identifies the DMA controller’s current byte offset pointer
relative to the DMA buffer descriptor pointer.
Description
w w w . d i g i e m b e d d e d . c o m
32 bit
16 bit
8 bit
Reserved
D M A M o d u l e
1 4 1