参数资料
型号: ZL50408GDG2
厂商: CONEXANT SYSTEMS
元件分类: 网络接口
英文描述: DATACOM, LAN SWITCHING CIRCUIT, PBGA208
封装: 17 X 17 MM, 1.40 MM HEIGHT, LEAD FREE, MO-192, LBGA-208
文件页数: 76/144页
文件大小: 1779K
代理商: ZL50408GDG2
ZL50408
Data Sheet
37
Zarlink Semiconductor Inc.
3 ID bits are used to allow up to eight ZL50408 devices to share the same synchronous serial interface. The ID of
each device can be setup by bootstrap.
To reduce the number of signals required, the register address, command and data are shifted in serially through
the DATAIN pin. STROBE- pin is used as the shift clock. DATAOUT pin is used as data return path.
Each command consists of four parts.
START pulse
Register Address
Read or Write command
Data to be written or read back
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
Write Command
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 is ignored
for these two pulses.
Figure 8 - Serial Interface Write Command Functional Timing
3.3.2
Read Command
All registers in ZL50408 can be read through this synchronous serial interface.
Figure 9 - Serial Interface Read Command Functional Timing
STROBE
DATAIN
A0
A2
A1
W
D0
D1
D2
D3
D12
D13
D14
D15
START
ADDR
CMD
DATA
2 Extra clocks after last
transfer
...
ID2
ID1
ID0
ID
DATAIN
DATAOUT
A0
A1
A2
R
D0
D1
D2
D12
D13
D14
D15
START
ADDR
CMD
DATA
...
STROBE
ID2
ID1
ID0
ID
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