ISP1507B1HNTM STEricsson, ISP1507B1HNTM Datasheet - Page 30

• Manufacturer Part Number: ISP1507B1HNTM
• Manufacturer: STEricsson

Specifications of ISP1507B1HNTM

• Lead Free Status / RoHS Status: Compliant

CD00269905
Product data sheet
10.5.2.4 RxEvent encoding
OTG devices:
provide a minimum of 8 mA on V
then there is no need for an overcurrent detection circuit because the internal
A_VBUS_VLD comparator is sufficient. If the OTG A-device provides more than 100 mA
on V
controllers”
B-device is initiating V
When an OTG device is configured as an OTG B-device, SESS_VLD must be used to
detect when V
when V
pulsing SRP.
The RxEvent field (see
packets received on the USB bus. RxActive and RxError are defined in USB 2.0
Transceiver Macrocell Interface (UTMI) Specification Ver. 1.05. HostDisconnect is defined
in UTMI+ Specification Rev. 1.0. A short definition is also given in the following
subsections.
Table 16.
RxActive:
an RxActive event to the link. An RxActive event can be communicated using two
methods. The first method is for the ISP1507x1 to simultaneously assert DIR and NXT.
The second method is for the ISP1507x1 to send an RXCMD to the link with the RxActive
field in RxEvent bits set to logic 1. The link must be able to detect both methods. RxActive
frames the receive packet from the first byte to the last byte.
The link must assume that RxActive is set to logic 0 when indicated in an RXCMD or when
DIR is deasserted, whichever occurs first.
The link uses RxActive to time high-speed packets and ensure that bus turnaround times
are met. For more information on the USB packet timing, see
RxError:
deasserts NXT and sends an RXCMD with the RxError field set to logic 1. The received
packet is no longer valid and must be dropped by the link.
HostDisconnect:
HostDisconnect is valid only when the ISP1507x1 is configured as a host (both
DP_PULLDOWN and DM_PULLDOWN are set to logic 1), and indicates to the host
controller when a peripheral is connected or disconnected. The host controller must
enable HostDisconnect by setting the HOST_DISCON_R and HOST_DISCON_F bits in
the USB_INTR_EN_R_E and USB_INTR_EN_F_E registers, respectively. Changes in
HostDisconnect will cause the PHY to send an RXCMD to the link with the updated value.
Value
00
01
11
10
BUS
BUS
, an overcurrent detector must be used and
When the ISP1507x1 has detected an error while receiving a USB packet, it
Encoded USB event signals
When the ISP1507x1 has detected a SYNC pattern on the USB bus, it signals
has dropped to a LOW level, allowing the B-device to safely initiate V
applies. The OTG A-device also uses SESS_VLD to detect when an OTG
BUS
When an OTG device is configured as an OTG A-device, it must be able to
is at a sufficient level for operation. SESS_END must be used to detect
HostDisconnect is encoded into the RxEvent field of the RXCMD.
BUS
RxActive
0
1
1
X
Table
Rev. 03 — 26 July 2010
pulsing SRP.
16) of the RXCMD informs the link of information related
BUS
. If the OTG A-device provides less than 100 mA,
ISP1507A1; ISP1507B1
RxError
0
0
1
X
Section “Standard USB host
ULPI HS USB OTG transceiver
Section
HostDisconnect
0
0
0
1
© ST-ERICSSON 2010. All rights reserved.
10.8.1.
BUS
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