參數(shù)資料
型號: MDS213
廠商: Zarlink Semiconductor Inc.
英文描述: 12-Port 10/100Mbps + 1Gbps Ethernet Switch
中文描述: 12口10/100Mbps千兆以太網(wǎng)交換機(jī)
文件頁數(shù): 75/120頁
文件大小: 1678K
代理商: MDS213
MDS213
Data Sheet
75
Zarlink Semiconductor Inc.
Bit [27:23] Count
Bit [31:28] BE [3:0]
Must be 00001
Byte lane enables
18.2.3.3 Address Registers For Burst Cycle
Two 32-bit burst size registers share a common format
MWARB
Address: h788
MRARB
Address: h78C
Memory Address Register - Burst Write (in D-words) - Maximum 8 D-words
Memory Address Register - Burst Read (in D-words) - Maximum 8 D-words
Access:
Zero-Wait-State,
via FIFO,
Write
Bit [0]
LK
Lock Flag
LK=0 Unlock
LK=1 Lock
Bit [1]
SP
Swap Byte Order
Bit [2]
Reserved
Bit [20:2]
MA [20:2]
Buffer memory address Bit [20:2] - (Bit [1:0] = 00)
Bit [21]
Reserved
Bit [22]
I/E
Indicate the Address is Internal or External memory
I/E=0 Internal memory I/E=1 External memory
Bit [27:23] Count
Count = Burst Size in double words Burst size for internal memory is up to
8 D-words. Burst size for external memory is up to 16-Dwords
00001 = 1 D-word, ……01000 = 8 D-word
01111 = 15 D-word 10000= 16 D-word
Valid value range for internal memory is {1 to 8}
Valid value range for external memory is {1 to 16}
Caution:
When setting Count = 16, the Starting address has to be in the Q-word boundary. That is MA[2]=0.
Bit [31:28]
Reserved
Address MA[20:2]
24 23 22 21 20
SP
Count
I/E
LK
3 2 1 0
28 27
31
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