zl50409 Zarlink Semiconductor, zl50409 Datasheet - Page 105
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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The checksum formula is:
When the ZL50409 boots from the EEPROM the checksum is calculated and the value must be zero. If the
checksum is not zeroed the ZL50409 does not start and pin CHECKSUM_OK is set to zero.
12.3.7.13
CPU Address:h610
Accessed by CPU (R/W)
In slot time (512 bit time). LHB packet will be sent out to the remote device if no other packet is transmitted in half
this period. The receiver will trigger LHB timeout interrupt if not receiving any good packet in this period.
12.3.7.14
CPU Address:h611, h612
Accessed by CPU (R/W)
The LHB frame uses MAC control frame format (same as flow control frame.) The register here defines the
operation code (we recommend h00-12).
12.3.7.15
CPU Address:h613, h614
Accessed by CPU (R/W)
The registers define the operation code if MAC control frame is forced out by processor.
12.3.7.16
I²C Address 0BF, CPU Address:h620
Accessed by CPU and I²C (R/W)
12.3.7.17
I²C Address 0C0, CPU Address:h621
Accessed by CPU and I²C (R/W)
Bits [7:0]
Bits [7:0]
LHBTimer – Link Heart Beat Timeout Timer
fMACCReg0, fMACCReg1 - MAC Control Frame OpCode
LHBReg0, LHBReg1 - Link Heart Beat OpCode
FCB Base Address Register 0
FCB Base Address Register 1
FF
i = 0
I²C register = 0
FCB Base address bit 7:0 (Default 0)
FCB Base address bit 15:8 (Default 0x60)
Zarlink Semiconductor Inc.
ZL50409
105
Data Sheet
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