NS7520B-1-I46 Digi International, NS7520B-1-I46 Datasheet - Page 188

• 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

MAC Configuration Register 1
1 7 6
E F E c o n f i g u r a t i o n
Table 59: Ethernet Receive Status register bit definition
Address: FF80 0400
MAC Configuration Register 1 contains bits that control functionality within the
Ethernet MAC block.
D05
D04:00
Bits
SRST
15
31
RST
SIM
30
14
R
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
29
13
Reserved
28
12
ROVER
Reserved
Mnemonic
RPEM
CSR
27
11
RPER
FUN
26
10
0
N/A
Reset
RPEM
CST
25
9
RPET
FUN
24
8
Reserved
Receive overflow
Set to 1 to indicate that a receive FIFO overrun condition
has occurred.
An overrun condition occurs when the FIFO becomes full
while receiving an Ethernet packet. This condition
indicates that the DMA controller was not able to empty the
FIFO at a fast enough rate compared to the rate that
information was received from the Ethernet medium for
one of these reasons:
When this bit is set, the RXREGR and RXFIFOH bits in
the Ethernet General Status register remain inactive. The
bad receive packet is flushed immediately from the FIFO.
N/A
Description
The memory peripheral device was not configured for
bursting.
the Ethernet interface.
The DMA controller was not configured for bursting.
The memory peripheral device is too slow to support
23
7
Reserved
22
6
21
5
LOOP
20
BK
4
FLOW
19
TX
3
FLOW
RX
18
2
PALL
RX
17
1
RXEN
16
0