zl50409 Zarlink Semiconductor, zl50409 Datasheet - Page 69
zl50409
Manufacturer Part Number
zl50409
Description
Managed 9-port 10/100m Ethernet Switch
Manufacturer
Zarlink Semiconductor
Datasheet
1.ZL50409.pdf
(135 pages)
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12.2.3
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12.2.4
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12.2.5
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Bit [0]:
Bit [1]:
Bit [2]:
Bit [3]:
Bit [4]:
Bit [5]:
Bits [7:6]:
Bit [0]:
Bit [1]:
Bit [2]:
Bit [3]:
Bit [4]:
Bit [5]:
Bits [7:6]:
Data of indirectly accessed registers (8 bits)
Address = 2 (read/write)
CPU transmit/receive switch frames (8/16 bits)
Address = 3 (read/write)
Format:
CPU interface commands and status (8 bits)
Address = 4 (read/write)
When the CPU writes to this register
When the CPU reads this register:
DATA_FRAME_REG
CONTROL_FRAME_REG
COMMAND&STATUS Register
8-byte of Frame status (Frame size, Source port #, VLAN tag)
Frame Data (size should be in multiple of 8-byte)
Set Control Frame Receive buffer ready, after CPU writes a complete frame into the buffer. This bit
is self-cleared.
Set Control Frame Transmit buffer1 ready, after CPU reads out a complete frame from the buffer.
This bit is self-cleared.
Set Control Frame Transmit buffer2 ready, after CPU reads out a complete frame from the buffer.
This bit is self-cleared.
Set this bit to indicate CPU received a whole frame (transmit FIFO frame receive done), and
flushed the rest of frame fragment, If occurs. This bit will be self-cleared.
Set this bit to indicate that the following Write to the Receive FIFO is the last one (EOF). This bit
will be self-cleared.
Set this bit to re-start the data that is sent from the CPU to Receive FIFO (re-align). This feature
can be used for software debug. For normal operation must be '0'.
Reserved. Must be '0'
Control Frame receive buffer ready, CPU can write a new frame
1 – CPU can write a new control command 1
0 – CPU has to wait until this bit is 1 to write a new control command 1
Control Frame transmit buffer1 ready for CPU to read
1 – CPU can read a new control command 1
0 – CPU has to wait until this bit is 1 to read a new control command
Control Frame transmit buffer2 ready for CPU to read
1 – CPU can read a new control command 1
0 – CPU has to wait until this bit is 1 to read a new control command
Transmit FIFO has data for CPU to read (TXFIFO_RDY)
Receive FIFO has space for incoming CPU frame (RXFIFO_SPOK)
Transmit FIFO End Of Frame (TXFIFO_EOF)
Reserved
Zarlink Semiconductor Inc.
ZL50409
69
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