参数资料
型号: ZL50408GDG2
厂商: CONEXANT SYSTEMS
元件分类: 网络接口
英文描述: DATACOM, LAN SWITCHING CIRCUIT, PBGA208
封装: 17 X 17 MM, 1.40 MM HEIGHT, LEAD FREE, MO-192, LBGA-208
文件页数: 14/144页
文件大小: 1779K
代理商: ZL50408GDG2
ZL50408
Data Sheet
110
Zarlink Semiconductor Inc.
12.3.7.11
DEVICE - Device Mode
CPU Address: h060A
Accessed by CPU (R/W)
12.3.7.12
CHECKSUM - EEPROM Checksum
IC Address: 0FF; CPU Address: h060B
Accessed by CPU and IC (R/W)
This register is used in unmanaged mode only. Before requesting that the ZL50408 updates the EEPROM device,
the correct checksum needs to be calculated and written into this checksum register.
The checksum formula is:
FF
Σ
IC register = 0
i = 0
When the ZL50408 boots from the EEPROM the checksum is calculated and the value must be zero. If the
checksum is not zeroed the ZL50408 does not start and pin CHECKSUM_OK is set to zero.
12.3.7.13
LHBTimer – Link Heart Beat Timeout Timer
CPU Address: h0610
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
LHBReg0, LHBReg1 - Link Heart Beat OpCode
CPU Address: h0611, h6012
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).
Bit [0]:
Reserved
Bit [1]:
CPU Interrupt Polarity
0: Negative Polarity
1: Positive Polarity (Default)
Bits [4:2]:
Reserved
Bits [7:5]:
Device ID (Default 0x0). See application note ZLAN-26, Processor Interface,
for usage.
Bits [7:0]:
Checksum content (Default 0)
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