MDS213 Datasheet, PDF (86/120 Pages) Zarlink Semiconductor Inc – 12-Port 10/100Mbps + 1Gbps Ethernet Switch

MDS213
Data Sheet
Bit [11:0]
QSW[2:0]
Transmission Queue Service Weight for queue 2, 1 & 0. (4 bit each)
Defines the service rate for each queue QR0-QR3
QR0 : QR1 : QR2 : QR3
QR0 = QSW0*(QSW1+1)* (QSW2+1)
QR1 = QSW1*(QSW2+1)
QR2 = QSW2
QR3 = 1
Note: Queue 0 has the highest priority. Queue Size is defined in the Queue Control Table
18.2.8.3 ATTL - Transmission Timing Control
Access: Non-Zero-Wait-State,
Direct Access, Write/Read
Address: h650
31
22 21
14 13
54
0
TxFIFO Threshold[7:0]
depart_time
qmt_cnt
Bit [4:0]
Bit[13:5]
Bit [21:14]
TXFIFOT
Transmission queue aging time out counter
frame latest departure time
Transmission FIFO Threshold in Bytes (Default =0) Only for 100M ports
Unit=8Bytes
0= Cut Through at the destination 100M port
When the value does not equal zero, it indicates the port cannot start
sending frames out, until the Tx FIFO reaches the threshold or EOF.
18.2.9 MII Serial Management Channel
These registers are part of the Management Module. They allow the upper layer services to communicate with any
one of the PHYs that are connected to the Management Module through the serial interface.
18.2.9.1 AMIIC - MII Command Register
This is a write-only register. The upper layer services write the management frame to be sent to the PHYs into this
register. The MSB (bit 31) is the first bit sent over the serial interface.
Access: Non-Zero-Wait-State,
Direct Access, Write only
Address:
h654
31 30 29 28 27
23 22
18 17 16 15
ST OP PHY_AD
REG_AD
TA
DATA (16-bit)
210
Bit [31:30]
Bit [29:28]
Bit [27:23]
ST
OP
PHY_AD
Start of frame - always = "01"
Operation code - "10" for read command and "01" for write command
5-bit PHY Address
86
Zarlink Semiconductor Inc.