at75c220 ATMEL Corporation, at75c220 Datasheet - Page 37

• Manufacturer Part Number: at75c220
• Description: Smart Internet Appliance Processor Siap
• Manufacturer: ATMEL Corporation

Table 15. Ethernet MAC Register Map (Continued)
MAC Network Control Register
Register Name: ETH_CTL
Access Type: Read/write
Reset Value: 0x0
•
•
•
•
Offset
0x74
0x78
0x7C
0x80
Address Registers
0x90
0x94
0x98
0x9C
0xA0
0xA4
0xA8
0xAC
0xB0
0xB4
LB
LBL
RE
TE
Loopback. Optional.
Loopback local. Connects TXD to RXD, TXEN to RXDV, forces full duplex and drives RXCLK and TXCLK with HCLK
divided by 4.
Receive enable. When set, enables the Ethernet MAC to receive data.
Transmit enable. When set, enables the Ethernet transmitter to send data.
WES
31
23
15
–
–
–
7
Register Name
ETH_SQEE
ETH_DRFC
ETH_SA1H
ETH_SA2H
ETH_SA3H
ETH_SA4H
ETH_SA1L
ETH_SA2L
ETH_SA3L
ETH_SA4L
ETH_HSH
ETH_USF
ETH_HSL
ETH_RJB
ISR
30
22
14
–
–
–
6
Description
Receive jabbers
Undersize frames
SQE test errors
Discarded RX frames
Hash Register [63:32]
Hash Register [31:0]
Specific address 1, first 4 bytes
Specific address 1, last 2 bytes
Specific address 2, first 4 bytes
Specific address 2, last 2 bytes
Specific address 3, first 4 bytes
Specific address 3, last 2 bytes
Specific address 4, first 4 bytes
Specific address 4, last 2 bytes
CSR
29
21
13
–
–
–
5
MPE
28
20
12
–
–
–
4
TE
27
19
11
–
–
–
3
RE
26
18
10
–
–
–
2
Read/write
Read/write
Read/write
Read/write
Read/write
Read/write
Read/write
Read/write
Read/write
Read/write
Read/write
Read/write
Read/write
Read/write
Access
LBL
25
17
–
–
9
–
1
Reset Value
0x0
0x0
0x0
0x0
0x0
0x0
0x0
0x0
0x0
0x0
0x0
0x0
0x0
0x0
BP
LB
24
16
–
–
8
0
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