NS7520B-1-I46 Digi International, NS7520B-1-I46 Datasheet - Page 180

• 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

Ethernet Transmit Status register
1 6 8
E F E c o n f i g u r a t i o n
Note:
Register bit assignment
Table 57: Ethernet FIFO Data register bit definition
Address: FF80 0010
The Ethernet Transmit Status register contains the status for the last completed
transmit buffer. The transmit buffer complete bit (TXBC) is set in the Ethernet
D31:00
D31:00
Bits
15
15
31
31
30
30
14
14
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
The Ethernet Receive Status register (see "Ethernet Receive Status
register" on page 173) should be read before clearing the RXBR bit. When
operating in interrupt service mode, RXBR is cleared manually. When
operating in DMA mode, the Ethernet Receive Status register is read
automatically and RXBR is cleared automatically.
29
13
29
13
28
12
28
12
FIFO
FIFO
Mnemonic
27
11
27
11
26
10
26
10
FIFO data: first and middle w ords
FIFO data: first and middle w ords
N/A
N/A
Reset
25
25
9
9
FIFO data: last w ord
FIFO data: last w ord
24
24
8
8
FIFO data — FF80 0008
First and middle words
FIFO data — FF80 000C
Last word, write-only
Description
23
23
7
7
22
22
6
6
21
21
5
5
20
20
4
4
19
19
3
3
18
18
2
2
17
17
1
1
16
16
0
0