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: 64/144页
文件大小: 1779K
代理商: ZL50408GDG2
ZL50408
Data Sheet
26
Zarlink Semiconductor Inc.
1.7
Power Sequencing
The ZL50408 has two separate power supplies: VDD (1.8 V) and VCC (3.3 V). The recommended power-up
sequence is for VCC to be applied first, followed by the VDD supply. VCC should lead VDD supply by at least 0.2 V,
but by no more than 2 V.
Both supplies may be powered-down simultaneously.
Figure 2 - Power-up Sequence
See “Typical Reset & Bootstrap Timing Diagram” on page 129 for more details on reset and bootstrap sampling.
2.0
Block Functionality
Figure 3 - Functional Block Diagram
RESIN
SCLK
VDC
I/O supply (VCC = 3.3V)
Core supply (VDD = 1.8V)
10 ns
> 10 s
>0.2 VDC
t
Management Module
Fast Ethernet
MAC
Interface
(RMII/MII/GPSI)
Frame Engine
& Queuing
SP/WFQ Scheduling,
Congestion WRED
Uplink MAC
Interface
64 KB
Switch
Control
Databases
CPU MAC
Interface
(RvMII)
I2C & Serial
Interface
*CPU 8/16 Bit
Parallel Interface
MDIO
Interface
JTAG
192 KB
Frame
Buffer
Memory
Per -Class Traffic Shaping,
L2 Search Engine
Single - Field Classifier,
4K MAC, 4K VLAN
Network Management
Database & RMON Counters
8 Fast
Ethernet
Ports
Gigabit
Ethernet
Port
Fast
Ethernet
Port
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