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參數(shù)資料
| 型號： | EA218E |
| 廠商： | Zarlink Semiconductor Inc. |
| 英文描述： | EA218E 8-Port Ethernet Access Controller XpressFlow 2020 Ethernet Routing Switch Chipset |
| 中文描述： | EA218E 8端口以太網(wǎng)接入控制器XpressFlow以太網(wǎng)路由交換機2020芯片組 |
| 文件頁數(shù)： | 9/28頁 |
| 文件大?。?/td> | 504K |
| 代理商： | EA218E |
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XpressFlow-2020 Series –
Ethernet Switch Chipset
EA218E
8-Port 10Mb Ethernet Access Controller
1998
Zarlink Semiconductor, Inc.
8
Rev.2.1 – February, 1999
2. FUNCTIONAL DESCRIPTION
2.1 Local Memory (Local Buffer Memory) Interface
Uses industry standard Synchronous Burst Mode SRAM up to 1M bytes
9
32k x 32, 64k x 32, 128k x 32, or 256k x 32
Provides separate Read and Write Chip Selects ( L_OE[3:0]# and L_WE[3:0]# ) for each memory chip
Supports back to back Read or Write operations across memory chips
2.1.1 Pin Description
Symbol
Type
Name and Functions
L_D[31:0]
TTL I/O-TS
Local Memory Data Bus Bit [31:0]
– a 32-bit synchronous data bus.
L_A[18:2]
CMOS Output
Local Memory Address Bus Bit [18:2]
– Bit [18:2] of a synchronous address bus. The
memory address is sampled when L_CS# is enabled and L_ADSC# is asserted.
Local Memory Address Bus Bit [19] or Local Memory Read Chip Select [3]
– De-
pends on memory configuration, this pin can be used as the Local Memory Address Bit
[19] or as the Local Memory Read Chip Select [3].
Local Memory Read Chip Select [2:0]
– allows up to read one of the 4 banks of mem-
ory.
Local Memory Write Chip Select [3:0]
– allows up to write one of the 4 banks of mem-
ory.
Local Memory Byte Write Enable [3:0]
– use to write individual bytes.
Local Memory Controller Address Status
– to load a new address.
Local Memory Clock
– a synchronous clock to memory devices.
Local Memory Data Bus Bit [31:0]
– a 32-bit synchronous data bus.
Local Memory Address Bus Bit [18:2]
– Bit [17:2] of a synchronous address bus. The
memory address is sampled when L_CS# is enabled and L_ADSC# is asserted.
Local Memory Address Bus Bit [19] or Local Memory Write Chip Select [3]
– De-
pends on memory configuration, this pin can be used as the Local Memory Address Bit
[19] or as the Local Memory Write Chip Select [3].
Local Memory Write Chip Select [2:0]
– allows up to write one of the 4 banks of mem-
ory.
Local Memory Read Chip Select [3:0]
– allows up to read one of the 4 banks of mem-
ory.
Local Memory Byte Write Enable [3:0]
– use to write individual bytes.
Local Memory Controller Address Status
– to load a new address.
Local Memory Clock
– a synchronous clock to memory devices.
L_A[19] /
L_OE[3]#
CMOS Output
L_OE[2:0]#
CMOS Output
L_WE[3:0]#
CMOS Output
L_BWE[3:0]#
L_ADSC#
L_CLK
L_D[31:0]
L_A[18:2]
CMOS Output
CMOS Output
CMOS Output
TTL I/O-TS
CMOS Output
L_A[19] /
L_WE[3]#
CMOS Output
L_WE[2:0]#
CMOS Output
L_OE[3:0]#
CMOS Output
L_BWE[3:0]#
L_ADSC#
L_CLK
CMOS Output
CMOS Output
CMOS Output
Note:
These pins have weak internal pull up resistors (50k to 100k Ohms each).
相關(guān)PDF資料 |
PDF描述 |
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| EA218EC0B | EA218E 8-Port Ethernet Access Controller XpressFlow 2020 Ethernet Routing Switch Chipset |
| EA218EC5B | EA218E 8-Port Ethernet Access Controller XpressFlow 2020 Ethernet Routing Switch Chipset |
| EA218EC6B | EA218E 8-Port Ethernet Access Controller XpressFlow 2020 Ethernet Routing Switch Chipset |
| EA218EI0B | EA218E 8-Port Ethernet Access Controller XpressFlow 2020 Ethernet Routing Switch Chipset |
| EA218EI5B | EA218E 8-Port Ethernet Access Controller XpressFlow 2020 Ethernet Routing Switch Chipset |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| EA218EC0B | 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:EA218E 8-Port Ethernet Access Controller XpressFlow 2020 Ethernet Routing Switch Chipset |
| EA218EC5B | 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:EA218E 8-Port Ethernet Access Controller XpressFlow 2020 Ethernet Routing Switch Chipset |
| EA218EC6B | 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:EA218E 8-Port Ethernet Access Controller XpressFlow 2020 Ethernet Routing Switch Chipset |
| EA218EI0B | 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:EA218E 8-Port Ethernet Access Controller XpressFlow 2020 Ethernet Routing Switch Chipset |
| EA218EI5B | 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:EA218E 8-Port Ethernet Access Controller XpressFlow 2020 Ethernet Routing Switch Chipset |
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