參數(shù)資料
型號(hào): MDS212CG
廠商: ZARLINK SEMICONDUCTOR INC
元件分類: 網(wǎng)絡(luò)接口
英文描述: 12-Port 10/100Mbps Ethernet Switch
中文描述: DATACOM, LAN SWITCHING CIRCUIT, PBGA456
封裝: 35 X 35 MM, 2.33 MM HEIGHT, MS-034, HSBGA-456
文件頁數(shù): 73/111頁
文件大?。?/td> 1609K
代理商: MDS212CG
MDS212
Data Sheet
73
Zarlink Semiconductor Inc.
18.2.3.2 MRARS - Memory Read Address Register - Single Cycle
Access:Zero-Wait-State,via FIFO,Write
Address:h784
Bit [0]
LK
Lock Flag memory
LK=0 Unlock
LK=1 Lock
Bit [1]
SP
Swap Byte Order
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
Must be 00001
Bit [31:28]
BE [3:0]
Byte lane enables.
18.2.3.3 Address Registers For Burst Cycle
Two 32-bit burst size registers share a common format
MWARB
Memory Address Register – Burst Write (in D-words) – Maximum 8 D-words
Address:
h788
MRARB
Memory Address Register – Burst Read (in D-words) – Maximum 8 D-words
Address:
h78C
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
31
28
27
24
23
22
21
20
3
2
1
0
BE[3:0]
0001
I/E
Address MA[20:2]
SP
LK
31
28
27
24
23
22
21
20
3
2
1
0
Count
I/E
Address MA[20:2]
SP
LK
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