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)： 19/40頁(yè)
文件大?。?/td> 342K
代理商： ΜPD72012
Preliminary Data Sheet S13918EJ2V0DS00
19
μ
PD72012
(3/5)
Value
Standard ROM code
product
No.
Field
Size
(Bytes)
Contents
003
004
User ROM
code
product
3
wHubCharacteristics
2
“0b01”: Monitor overcurrent for each port
individually.
Since this is the setting for a standard
ROM code product (003), a circuit that can
individually control overcurrent protection
functions externally is needed.
If this value is set for a User ROM code
product, the pins CS1 to CS5 operate
individually.
“0b1X”: Shows that there is no overcurrent
protection function.
If this value is set for a User ROM code
product, clamp all of the pins CS1 to CS5
to 3.3 V.
Bits 15-5:These bits are reserved in the USB
standard for future extended functions.
For a User ROM code product, be sure to
set these bits to “0”.
Caution Be sure to set the values in bits 3 and 0
the same in User ROM code product
settings.
0x0009
0x0000
0x00XX
5
bPowerOn2PwrGood
1
Shows the time from detecting a device at a port and
starting the power-on sequence until the power
supply stabilizes.
Two milliseconds are taken as one unit. This is 100
ms for the
μ
PD72012.
0x32
0x32
0x32
6
bHubContrCurrent
1
Shows the maximum current consumption of the
HUB in mA. Note that this value does not show the
rated current consumption value for the
μ
PD72012
itself.
For a standard ROM code product, “0x50” is applied
for compatibility with the
μ
PD72011. This value can
be defined for a User ROM code product. However,
the maximum current consumption value of the
μ
PD72012 that is described in the data sheet should
not be exceeded.
0x50
0x50
0xXX
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