參數(shù)資料
型號: ISP1521
廠商: NXP Semiconductors N.V.
英文描述: Hi-Speed Universal Serial Bus hub controller
中文描述: 高速通用串行總線控制器樞紐
文件頁數(shù): 13/53頁
文件大?。?/td> 270K
代理商: ISP1521
Philips Semiconductors
ISP1521
Hi-Speed USB hub controller
Product data
Rev. 03 — 24 November 2004
13 of 53
9397 750 13702
Koninklijke Philips Electronics N.V. 2004. All rights reserved.
9.
Configuration selections
The ISP1521 is configured through I/O pins and, optionally, through an external
I
2
C-bus, in which case the hub can update its configuration descriptors as a master or
as a slave.
Table 3
shows the configuration parameters.
[1]
[2]
Multiple ganged power mode is reported as individual power mode; refer to the USB 2.0 specification.
When the hub uses the global overcurrent protection mode, the overcurrent indication is through the wHubStatus field bit 1 (overcurrent)
and the corresponding change bit (overcurrent change).
Table 3:
Mode and selection
Configuration parameters
Option
Configuration method
Pin control
Control pin
DM1/DP1 to
DM7/DP7
Software control
Affected field
bNbrPorts0
Reference
see
Section 9.1.1
Reference
see
Table 22
Number of downstream
facing ports
2 ports
3 ports
4 ports
5 ports
6 ports
7 ports
none
ganged
multiple ganged
[1]
individual
Power switching mode
PSW1_N to
PSW7_N
see
Section 9.1.2
wHubCharacteristics:
bits D1 and D0
bPwrOn2PwrGood:
time interval
wHubCharacteristics:
bits D4 and D3
see
Table 22
Overcurrent protection
mode
none
global
[2]
multiple ganged
individual
any port can be
non-removable
NOOC and
OC1_N to
OC7_N
see
Section 9.1.3
see
Table 22
Non-removable ports
AMBn_N
see
Section 9.1.4
wHubCharacteristics:
bit D2 (compound hub)
DeviceRemovable:
bit map
wHubCharacteristics:
bit D7
see
Table 22
Port indicator support
no
yes
all GRNn_N
see
Section 9.1.5
see
Table 22
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