參數(shù)資料
型號(hào): STLC1510
廠商: 意法半導(dǎo)體
英文描述: NorthenLite G.lite DMT Transceiver
中文描述: NorthenLite G.lite大唐收發(fā)器
文件頁(yè)數(shù): 32/40頁(yè)
文件大小: 426K
代理商: STLC1510
STLC1510
32/40
Figure 18. GPIO Interface Timing
7.3 Power-up supply sequencing
There are two power supply voltages that must be
applied to this chip to ensure correct functionality,
(3.3V and 2.5V). The chip itself will function correctly
regardless of the sequence in which the supplies are
applied on power-up.
However if the 3.3V supply is off and there isexternal
5V activity at the IOs, the internal ESD protection cir-
cuitry willclamp the external signals at 2.8 Volts max-
imum (by sinking as much current as provided by the
interface).
8.0 EXTERNAL INTERFACE TIMING
8.1 NIF (Network Interface) Serial Interface
The NIF serial interface consists of separate clock
and datalines inthe RX and TX directions. This inter-
face is illustrated briefly in Figure 19.
Figure 19. The NIF Serial Interface
In the Tx direction, the reception of a data byte from
the network starts with the most significant bit. Bits
are sampled by STLC1510 on the rising edge of Tx-
Clk. In the presence of clock gapping (which is gen-
erated by the STLC1510, as it supplies the clocks in
both directions), a previous bit persists until the next
rising edge of the clock. Figure 21. shows the rela-
tionship between TxClk and UTxData[0].
Table 18. GPIO Interface Timing
Pin Name
Parameter
Min.
Max.
Reference Pin
GPIO[1:7]
tacc
0
10ns
w.r.t. rising GPIO[0]
GPIO[1:7]
tse
5ns
w.r.t. rising GPIO[0]
GPIO[1:7]
tho
2ns
w.r.t. rising GPIO[0]
GPIO [0]
tacc
GPIO[1:7]
tse
tho
G PIO[1:7]
TxClk
RxClk
UTxData[0]
URxData[0]
Network
STLC1510
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