zl50408 Zarlink Semiconductor, zl50408 Datasheet - Page 30
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zl50408
Manufacturer Part Number
zl50408
Description
Managed 8-port 10/100m 1-port 10/100/1000m Ethernet Switch
Manufacturer
Zarlink Semiconductor
Datasheet
1.ZL50408.pdf
(132 pages)
- Current page: 30 of 132
- Download datasheet (2Mb)
Each command consists of four parts.
•
•
•
•
Write operation can be aborted in the middle by sending an ABORT pulse to the ZL50408. Read operation can only
be aborted before issuing the read command to the ZL50408.
A START command is detected when DATAIN is sampled high when STROBE- rise and DATAIN is sampled low
when STROBE- fall.
An ABORT command is detected when DATAIN is sampled low when STROBE- rise and DATAIN is sampled high
when STROBE- fall.
3.3.1
All registers in ZL50408 can be modified through this synchronous serial interface. Once the data has been sent,
two extra STOBE clocks must be generated to indicate the end of the write command. The DATAIN line should be
held high for these two pulses.
3.3.2
All registers in ZL50408 can be read through this synchronous serial interface.
START pulse
Register Address
Read or Write command
Data to be written or read back
Write Command
Read Command
STROBE-
DATAIN
D0
START
ID0
DATAIN
DATAOUT
STROBE-
Figure 7 - Serial Interface Write Command Functional Timing
Figure 8 - Serial Interface Read Command Functional Timing
AUTOFD-
ID1
ID
D0
ID2
START
A0
ID0
ADDR
A1
ID
ID1
A2
ID2
CMD
W
Zarlink Semiconductor Inc.
A0 A1 A2
D0 D1 D2 D3
ADDR
ZL50408
30
CMD
R
D0 D1 D2
...
DATA
D12
D13
DATA
...
D14
D12
D15
D13
2 Extra clocks after last
D14
D15
transfer
Data Sheet
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