ISP1562BEUM ST-Ericsson Inc, ISP1562BEUM Datasheet - Page 53

• Manufacturer Part Number: ISP1562BEUM
• Description: IC USB HOST CTRL HI-SPD 100LQFP
• Manufacturer: ST-Ericsson Inc

Specifications of ISP1562BEUM

• Applications: USB Host/Function Processor
• Interface: EHCI Interface
• Voltage - Supply: 3 V ~ 3.6 V
• Package / Case: 100-LQFP
• Mounting Type: Surface Mount
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: ISP1562BE-T; ISP1562BE-T

NXP Semiconductors
[1]
Table 80.
Address: Content of the base address register + 48h
ISP1562_2
Product data sheet
Bit
Symbol
Reset
Access
Bit
31 to 24
23 to 13
12
11
10
9
8
7 to 0
The reserved bits should always be written with the reset value.
HcRhDescriptorA - Host Controller Root Hub Descriptor A register bit description
Symbol
POTPGT
[7:0]
reserved
NOCP
OCPM
DT
NPS
PSM
NDP[7:0]
11.1.20 HcRhDescriptorB register
R
7
0
The HcRhDescriptorB register is the second of two registers describing the characteristics
of the root hub. The bit allocation is given in
initialization to correspond to the system implementation. Reset values are
implementation-specific.
Description
Power On To Power Good Time: This byte specifies the duration the HCD must wait before
accessing a powered-on port of the root hub. It is implementation-specific. The unit of time is
2 ms. The duration is calculated as POTPGT
-
No Overcurrent Protection: This bit describes how the overcurrent status for root hub ports
are reported. When this bit is cleared, the OCPM bit specifies global or per-port reporting.
0 — Overcurrent status is collectively reported for all downstream ports.
1 — No overcurrent protection supported.
Overcurrent Protection Mode: This bit describes how the overcurrent status for root hub ports
are reported. At reset, this fields reflects the same mode as Power Switching Mode. This field is
valid only if the NOCP bit is cleared.
0 — Overcurrent status is collectively reported for all downstream ports.
1 — Overcurrent status is reported on a per-port basis.
Device Type: This bit specifies that the root hub is not a compound device. The root hub is not
permitted to be a compound device. This field must always read logic 0.
No Power Switching: This bit is used to specify whether power switching is supported or ports
are always powered. It is implementation-specific. When this bit is cleared, the PSM bit
specifies global or per-port switching.
0 — Ports are power switched.
1 — Ports are always powered on when the Host Controller is powered on.
Power Switching Mode: This bit is used to specify how the power switching of root hub ports is
controlled. It is implementation-specific. This field is only valid if the NPS field is cleared.
0 — All ports are powered at the same time.
1 — Each port is individually powered. This mode allows port power to be controlled by either
the global switch or per-port switching. If the PPCM (Port Power Control Mask) bit is set, the
port responds only to port power commands (Set/Clear Port Power). If the port mask is cleared,
then the port is controlled only by the global power switch (Set/Clear Global Power).
Number Downstream Ports: These bits specify the number of downstream ports supported
by the root hub. It is implementation-specific. The minimum number of ports is 1. The maximum
number of ports supported by OHCI is 15.
R
6
0
R
5
0
Rev. 02 — 1 March 2007
R
4
0
NDP[7:0]
Table
R
3
0
2 ms.
81. These fields are written during
R
2
0
HS USB PCI Host Controller
R
1
0
© NXP B.V. 2007. All rights reserved.
ISP1562
R
0
1
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