參數(shù)資料
型號(hào)： ISL5416KI
廠商： INTERSIL CORP
元件分類： 無(wú)繩電話/電話
英文描述： Four-Channel Wideband Programmable DownConverter
中文描述： TELECOM, CELLULAR, BASEBAND CIRCUIT, PBGA256
封裝： 17 X 17 MM, PLASTIC, BGA-256
文件頁(yè)數(shù)： 26/71頁(yè)
文件大?。?/td> 2013K
代理商： ISL5416KI
26
Power-up Sequencing
The ISL5416 core and I/O blocks are isolated by structures
which may become forward biased if the supply voltages are
not at specified levels. During the power-up and power-down
operations, differences in the starting point and ramp rates of
the two supplies may cause current to flow in the isolation
structures which, when prolonged and excessive, can
reduce the usable life of the device.
In general, the most preferred case would be to power-up
the core and I/O structures simultaneously. However, it is
also safe to power-up the core prior to the I/O block if
simultaneous application of the supplies is not possible. In
this case, the I/O voltage should be applied in 10ms to
100ms nominally to preserve supply component reliability.
Bringing the core and I/O supplies to their respective
regulation levels in a maximum time frame of a 100ms,
moderates the stresses placed on both, the power supply
and the ISL5416.
TABLE OF MICROPROCESSOR DIRECT READ/WRITE ADDRESSES
ADD(2:0)
PINS
REGISTER DESCRIPTION
0
WR
Indirect Write Data Bus (15:0), “Master (15:0)”.
1
WR
Indirect Write Data Bus (31:16), “Master (31:16)”.
2
WR
Indirect Write Address Register for Internal Target Register (Generates a write strobe to transfer contents of the
Write Holding Register into the Target Register specified by the Indirect Address, see also Tables of Indirect
Address Registers).
3
WR
Indirect Read Address Register (Used to select the Read source of data - uses the same register as Direct
Address 2 but does not generate a write strobe).
4
WR
RESERVED
5
WR
RESERVED
6
WR
RESERVED
7
WR
RESERVED
0
RD
Indirect Read, Bits 15:0.
1
RD
Indirect Read, Bits 31:16.
2
RD
Status (15:0).
3
RD
RESERVED
4
RD
Channel 0 Sequenced Read Address.
5
RD
Channel 1 Sequenced Read Address.
6
RD
Channel 2 Sequenced Read Address.
7
RD
Channel 3 Sequenced Read Address.
ISL5416
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