參數(shù)資料
型號(hào)： 935270538118
廠商： NXP SEMICONDUCTORS
元件分類： 總線控制器
英文描述： UNIVERSAL SERIAL BUS CONTROLLER, PQFP64
封裝： 10 X 10 MM, 1.40 MM HEIGHT, PLASTIC, MS-026, SOT-314-2, LQFP-64
文件頁(yè)數(shù)： 46/93頁(yè)
文件大?。?/td> 2118K
代理商： 935270538118
Philips Semiconductors
ISP1160
Embedded USB Host Controller
Product data
Rev. 03 — 27 February 2003
50 of 89
9397 750 10765
Koninklijke Philips Electronics N.V. 2003. All rights reserved.
Table 29:
HcRhDescriptorA register: bit description
Bit
Symbol
Description
31 to 24
POTPGT
[7:0]
PowerOnToPowerGoodTime: This byte species the duration
HCD has to wait before accessing a powered-on port of the Root
Hub. It is implementation-specic (IS). The unit of time is 2 ms.
The duration is calculated as POTPGT
× 2ms.
23 to 13
-
reserved
12
NOCP
NoOverCurrentProtection: This bit describes how the
overcurrent status for the Root Hub ports are reported. When this
bit is cleared, the OverCurrentProtectionMode eld species
global or per-port reporting.
0 — overcurrent status is reported collectively for all downstream
ports
1 — no overcurrent reporting supported
11
OCPM
OverCurrentProtectionMode: This bit describes how the
overcurrent status for the Root Hub ports is reported. At reset, this
eld should reect the same mode as PowerSwitchingMode. This
eld is valid only if the NoOverCurrentProtection eld is cleared.
0 — overcurrent status is reported collectively for all downstream
ports
1 — overcurrent status is reported on a per-port basis. On
power-up, clear this bit and then set it to logic 1.
10
DT
DeviceType: This bit species that the Root Hub is not a
compound device—it is not permitted. This eld should always
read/write 0.
9
NPS
NoPowerSwitching: These bits are used to specify whether
power switching is supported or ports are always powered. It is
implementation-specic. When this bit is cleared,
bit PowerSwitchingMode species global or per-port switching.
0 — ports are power switched
1 — ports are always powered on when the HC is powered on
8
PSM
PowerSwitchingMode: This bit is used to specify how the power
switching of the Root Hub ports is controlled. It is
implementation-specic. This eld is valid only if the
NoPowerSwitching eld is cleared.
0 — all ports are powered at the same time
1 — each port is powered individually. This mode allows port
power to be controlled by either the global switch or per-port
switching. If the bit PortPowerControlMask is set, the port
responds to only port power commands (Set/ClearPortPower). If
the port mask is cleared, then the port is controlled only by the
global power switch (Set/ClearGlobalPower).
7 to 2
-
reserved
1 to 0
NDP[1:0]
NumberDownstreamPorts: These bits specify the number of
downstream ports supported by the Root Hub. It is
implementation-specic. The maximum number of ports supported
is 2.
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