MDS212 Datasheet, PDF (72/111 Pages) Zarlink Semiconductor Inc – 12-Port 10/100Mbps Ethernet Switch

MDS212
18.2.3 Buffer Memory Interface Register
18.2.3.1 MWARS - Memory Write Address Register - Single Cycle
• Access:
• Address:
Zero-Wait-State,
h780
via FIFO,
Write
31
28
BE[3:0]
27 26
24 23 22
00001
I/E
21 20
Address MA[20:3]
Data Sheet
3 2 10
SP LK
Bit [0]
LK
Bit [1]
Bit [20:2]
Bit [21]
Bit [22]
SP
MA [20:2]
Reserved
I/E
Bit [27:23]
Bit [31:28]
Count
BE [3:0]
Lock Flag (for internal memory only)
LK=0 UnlockLK=1 Lock
Swap Byte Order
Buffer memory address Bit [20:2] – (Bit [1:0] = 00)
Indicates the Address is Internal or External memory
I/E=0 Internal memory
I/E=1 External memory
Must be 00001
Byte lane enables
CPU Bus Type
Little Endian
Big Endian
Bit [31]
BE [3]
BE [0]
Bit [30]
BE [2]
BE [1]
Bit [29]
BE [1]
BE [2]
Bit [28]
BE [0]
BE [3]
72
Zarlink Semiconductor Inc.