NS7520B-1-C36 Digi International, NS7520B-1-C36 Datasheet - Page 190

• 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

MAC Configuration Register 2
1 7 8
E F E c o n f i g u r a t i o n
Table 60: MAC Configuration Register 1 bit definition
Address: FF80 0404
MAC Configuration Register 2 contains bits that control functionality within the
Ethernet MAC block.
D02
D01
D00
Bits
Rsvd
15
31
DEFER
30
14
E
R/W
R/W
R/W
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
BACKP NOBO
29
13
28
12
RXFLOW
PALLRX
RXEN
Mnemonic
27
11
Reserved
26
10
LONGP PUREP
0
0
0
Reset
25
9
24
8
Reserved
RX flow control
1
0
Pass ALL receive frames
1
0
Receive enable
Set to 1 to allow the MAC receiver to receive frames.
Internally, the MAC synchronizes this control bit to the
incoming receive stream and outputs SYNCHRONIZED
RECEIVE ENABLE. The host system uses
SYNCHRONIZED RECEIVE ENABLE to qualify
receive frames.
Description
AUTOP VLANP
The MAC acts on received PAUSE flow control
frames.
The MAC ignores all PAUSE flow control frames.
The MAC receiver indicates PASS CURRENT
RECEIVE FRAME for all frames, no matter the type
(normal or flow control).
Deasserts PASS CURRENT RECEIVE FRAME for
valid control frames.
23
7
22
6
PAD
21
EN
5
CRC
20
EN
4
CRC
DEL
19
3
HUGE FLENC
18
2
17
1
FULLD
16
0