at75c220 ATMEL Corporation, at75c220 Datasheet - Page 36

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

hash matched frames. So all multicast frames can be
received by setting all bits in the hash register.
The CRC algorithm reduces the destination address to a 6-
bit index into a 64-bit hash register. If the equivalent bit in
the register is set, the frame will be matched depending on
Register Map
Base Address MAC A: 0xFF034000
Base Address MAC B: 0xFF038000
Table 15. Ethernet MAC Register Map
36
Offset
0x00
0x04
0x08
0x0C
0x10
0x14
0x18
0x1C
0x20
0x24
0x28
0x2C
0x30
0x34
Statistics Registers
0x40
0x44
0x48
0x4C
0x50
0x54
0x58
0x5C
0x60
0x64
0x68
0x6C
0x70
Register Name
ETH_RBQP
ETH_MCOL
ETH_SCOL
ETH_SEQE
ETH_ECOL
ETH_LCOL
ETH_MAN
ETH_CFG
ETH_TCR
ETH_TSR
ETH_RSR
ETH_FRA
ETH_DTE
ETH_CSE
ETH_TUE
ETH_CDE
ETH_CTL
ETH_TAR
ETH_ALE
ETH_ELR
ETH_IMR
ETH_ISR
ETH_IER
ETH_IDR
ETH_SR
ETH_OK
–
AT75C220
Description
Network Control Register
Network Configuration Register
Network Status Register
Transmit Address Register
Transmit Control Register
Transmit Status Register
Receive buffer queue pointer
Reserved
Receive Status Register
Interrupt Status Register
Interrupt Enable Register
Interrupt Disable Register
Interrupt Mask Register
PHY Maintenance Register
Frames transmitted OK
Single collision frames
Multiple collision frames
Frames received OK
Frame check sequence errors
Alignment errors
Deferred transmission frames
Late collisions
Excessive collisions
Carrier sense errors
Transmit underrun errors
Code errors
Excessive length errors
whether the frame is multicast or unicast and the appropri-
ate match signals will be sent to the DMA block
If the copy all frames bit is set in the network configuration
register, the store frame pulse will always be sent to the
DMA block as soon as any destination address is received.
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
Read/write
Read/write
Read/write
Read/write
Read/write
Read/write
Read/write
Read/write
Read-only
Read-only
Write-only
Write-only
Read-only
Access
Reset Value
0xFFFF
0x800
0x18
0x0
0x4
0x0
0x0
0x0
0x0
0x0
0x0
0x0
0x0
0x0
0x0
0x0
0x0
0x0
0x0
0x0
0x0
0x0
0x0
0x0
0x0
–
–