cp2200 Silicon Laboratories, cp2200 Datasheet - Page 81

• Manufacturer Part Number: cp2200
• Description: Single-chip Ethernet Controller
• Manufacturer: Silicon Laboratories

Bit 15:
Bit 14:
Bits 13–5:Reserved. Read = varies; Must write 000000000b.
Bit 4:
Bit 3:
Bit 2:
Bit 1:
Bit 0:
Reserved RANDRST
Bit15
R/W
R/W
Bit7
Reserved. Read = varies; Must write 0b.
RANDRST: Random Number Generator Reset
Writing a ‘1’ to this bit resets the random number generator within the transmit function.
LOOPBCK: Loopback Mode Enable Bit
Note: MAC Loopback Mode is independent of the physical layer loopback mode.
0: Normal operation.
1: MAC transmit data is internally looped back as MAC receive data.
TXPAUSE: TX Flow Control Enable Bit (Full-Duplex Only)
0: PAUSE control frames are blocked.
1: PAUSE control frames are allowed to pass through the MAC.
RXPAUSE: RX Flow Control Enable Bit (Full-Duplex Only)
0: PAUSE control frames received from the physical layer are ignored.
1: PAUSE control frames received from the physical layer are acted upon.
Reserved. Read = 0; Must write 0b.
RCVEN: Receive Enable
0: The MAC blocks control frames from reaching the receive interface. The MAC blocks all received
1: The MAC allows received packets to reach the receive interface.
Reserved
packets from the receive interface.
Bit14
R/W
R/W
Bit6
Indirect Register 1. MACCN: MAC Control Register
Bit13
R/W
R/W
Bit5
LOOPBCK TXPAUSE RXPAUSE Reserved
Bit12
R/W
R/W
Bit4
Bit11
R/W
R/W
Bit3
Rev. 1.0
Reserved
Bit10
R/W
R/W
Bit2
R/W
Bit9
R/W
Bit1
RCVEN
R/W
Bit8
R/W
Bit0
CP2200/1
Default Value
MACADDR:
0x8000
0x00
81