MDS212 Datasheet, PDF (67/111 Pages) Zarlink Semiconductor Inc – 12-Port 10/100Mbps Ethernet Switch

MDS212
Data Sheet
18.2.1.3 DCR1 - Signature, Revision & ID Register
• Access:
• Address:
Non-Zero-Wait-State,
h7C4
Direct Access,Write/Read
31
25 24
20 19
16 15
12 11
87
Dev_ID
Signature
43 2
0
Rev
Bit [3:0] Device Revision Code
Bit [6:4] Reserved
Bit [15:8] Signature
Bit [19:16] Reserved
Bit [24:20] DEV_ID
Bit [31:25] Reserved
8-bit Device Signature
5-bit Device ID (Read/Write)
18.2.1.4 DCR2 - Device Configuration Register
• Access:
• Address:
Non-Zero-Wait-State, Direct Access, Write/Read
h7C8
31
27 26 25
22 21 20 19 18 17
Boot Strap IP
MC
FE and MAC
SE Configuration
9 87 6 5
4 32
1
0
MT ML SM IP SC
Bit [1:0] SC System Clock Rate
Default = 00
00= 100Mhz
10=90Mhz
01 = 120Mhz
11=80Mhz
Bit [2] IP IRQ output polarity control Power-up default =0
0 = active low output 1 = active high output
Bit [3] SM System Configuration mode
0=Nonblocking (For MDS212, Always equal to 0)
1=Blocking
SRAM Memory Characteristics
Bit [4] ML Buffer Memory Level, which can be either 2 chips or 4 chips.
0 = 2 memory chips
Default = 0
1 = 4 memory chips
Bit [6:5] MT Memory Chip Type
Default = 01
00 = 64K x 32-bit
01 = 128K x 32-bit
10 = 256K x 32-bit
11 = 512K x 32-bit
Bit [8:7]
Reserved
67
Zarlink Semiconductor Inc.