參數(shù)資料
型號(hào)： μPD72012
廠商： NEC Corp.
英文描述： Hub Controller For USB(集線器控制器)
中文描述： 集線器控制器的USB（集線器控制器）
文件頁(yè)數(shù)： 18/40頁(yè)
文件大?。?/td> 342K
代理商： ΜPD72012
18
Preliminary Data Sheet S13918EJ2V0DS00
μ
PD72012
(2/5)
Value
Standard ROM code
product
No.
Field
Size
(Bytes)
Contents
003
004
User ROM
code
product
3
wHubCharacteristics
2
Uses a bitmap to show attributes of the
μ
PD72012.
The meaning of each bit is as follows.
Bits 1,0: Show the power switch switching attribute.
“0b00”: Enable all power switches at once.
This is the value for a standard ROM code
product (004).
If this value is set for a User ROM code
product, all of pins PP1 to PP5 operate the
same.
“0b01”: Enable power switches individually for
each port.
This is the value for a standard ROM code
product (003).
If this value is set for a User ROM code
product, pins PP1 to PP5 operate
individually.
“0b1X”: Shows that there is no enabling of power
switches.
If this value is set for a User ROM code
product, leave all of pins PP1 to PP5
unconnected.
Bit 2:
Identifier of a composite device. Set this to
“0b0” when using the
μ
PD72012 as a unit
HUB and to “0b1” when using it as multiple
devices.
“0b0”:
Shows that the
μ
PD72012 has only HUB
unit functions.
“0b1”:
Shows that the set containing the
μ
PD72012 is multiple devices.
Bits 4,3: Show the overcurrent protection switching
attribute.
“0b00”: Monitor overcurrent for all ports in a batch.
Since this is the value for a standard ROM
code product (004), a circuit that can
control all overcurrent protection functions
at once externally is needed.
If this value is set for a User ROM code
product, the pins CS1 to CS5 all operate
the same.
0x0009
0x0000
0x00XX
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