PHILIPS ISP1520BD

ISP1520
Hi-Speed Universal Serial Bus hub controller
Rev. 02 — 04 May 2004
Product data
1. General description
The ISP1520 is a stand-alone Universal Serial Bus (USB) hub controller IC that
complies with Universal Serial Bus Specification Rev. 2.0. It supports data transfer at
high-speed (480 Mbit/s), full-speed (12 Mbit/s) and low-speed (1.5 Mbit/s).
The upstream facing port can be connected to a Hi-Speed USB host or hub or to an
Original USB host or hub. If the upstream facing port is connected to a Hi-Speed USB
host or hub, then the ISP1520 will operate as a Hi-Speed USB hub. That is, it will
support high-speed, full-speed and low-speed devices connected to its downstream
facing ports. If the upstream facing port is connected to an Original USB host or hub,
then the ISP1520 will operate as an Original USB hub. That is, high-speed devices
that are connected to its downstream facing ports will operate in full-speed mode
instead.
The ISP1520 is a full hardware USB hub controller. All Original USB devices
connected to the downstream facing ports are handled using a single Transaction
Translator (TT), when operating in a cross-version environment. This allows the
whole 480 Mbit/s upstream bandwidth to be shared by all the Original USB devices
on its downstream facing ports.
The ISP1520 has four downstream facing ports. If not used, ports 3 and 4 can be
disabled. The vendor ID, product ID and string descriptors on the hub are supplied by
the internal ROM; they can also be supplied by an external I2C-bus™ EEPROM or a
microcontroller.
The ISP1520 IC is suitable for self-powered hub designs.
An analog overcurrent detection circuitry is built into the ISP1520, which can also
accept digital overcurrent signals from external circuits; for example, Micrel MOSFET
switch MIC2026. The circuitry can be configured to trip on a global or an individual
overcurrent condition.
Each port comes with two status indicator LEDs.
Target applications of the ISP1520 are monitor hubs, docking stations for notebooks,
internal USB hub for motherboards, hub for extending Intel® Easy PCs, hub boxes,
and so on.
ISP1520
Philips Semiconductors
Hi-Speed USB hub controller
2. Features
■ Complies with:
◆ Universal Serial Bus Specification Rev. 2.0
◆ Advanced Configuration and Power Interface (ACPI™), OnNow™ and USB
power management requirements.
■ Supports data transfer at high-speed (480 Mbit/s), full-speed (12 Mbit/s) and
low-speed (1.5 Mbit/s)
■ Self-powered capability
■ USB suspend mode support
■ Configurable number of ports
■ Internal power-on reset and low voltage reset circuit
■ Port status indicators
■ Integrates high performance USB interface device with hub handler, Philips Serial
Interface Engine (SIE) and transceivers
■ Built-in overcurrent detection circuit
■ Individual or ganged power switching, individual or global overcurrent protection,
and non-removable port support by I/O pins configuration
■ Simple I2C-bus (master/slave) interface to read device descriptor parameters,
language ID, manufacturer ID, product ID, serial number ID and string descriptors
from a dedicated external EEPROM, or to allow the microcontroller to set up hub
descriptors
■ Visual USB traffic monitoring (GoodLink™) for the upstream facing port
■ Uses 12 MHz crystal oscillator with on-chip Phase-Locked Loop (PLL) for low
ElectroMagnetic Interference (EMI)
■ Full industrial operating temperature range from 0 °C to 70 °C
■ Available in LQFP64 package.
3. Applications
■
■
■
■
■
Monitor hubs
Docking stations for notebooks
Internal hub for USB motherboards
Hub for extending Easy PCs
Hub boxes.
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
9397 750 11689
Product data
Rev. 02 — 04 May 2004
2 of 51
ISP1520
Philips Semiconductors
Hi-Speed USB hub controller
4. Abbreviations
ACPI — Advanced Configuration and Power Interface
EMI — ElectroMagnetic Interference
ESD — ElectroStatic Discharge
NAK — Not AcKnowledge
PID — Packet Identifier
PLL — Phase-Locked Loop
SIE — Serial Interface Engine
TT — Transaction Translator
USB — Universal Serial Bus.
5. Ordering information
Table 1:
Ordering information
Type number
Package
Name
ISP1520BD
Description
LQFP64 plastic low profile quad flat package; 64 leads; body SOT314-2
10 × 10 × 1.4 mm
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
9397 750 11689
Product data
Version
Rev. 02 — 04 May 2004
3 of 51
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RREF
DM0
DP0
3
4
12 MHz
XTAL1
5
7
XTAL2
33
34
PLL
VCC1
VCC2
VCC3
VCC4
TEST_HIGH
RAM
ROM
9, 39
13, 45
ANALOG TRANSCEIVER
• ORIGINAL USB
• HI-SPEED USB
PHILIPS PIE
23, 57
I2C-bus
BIT CLOCK
RECOVERY
64
I2C-BUS
CONTROLLER
11, 41
TRANSACTION
TRANSLATOR
8, 12,
18, 38
31
HUB
CONTROLLER
PHILIPS SIE
TEST_HIGH
Rev. 02 — 04 May 2004
GND
17
2, 6, 10,
14, 21,
22, 35,
40, 42,
46, 58,
59
63
HUB REPEATER
• ORIGINAL USB
• HI-SPEED USB
MINI-HOST
CONTROLLER
62
1
SDA
Philips Semiconductors
RPU
6. Block diagram
9397 750 11689
Product data
upstream port 0
SCL
RESET_N
HUBGL_N
SUSPEND
ISP1520
32
PORT
CONTROLLER
49
ROUTING LOGIC
ADOC
NOOC
24, 56
VREF(5V0)
PORT 1
ANALOG
TRANSCEIVER
• ORIGINAL USB
• HI-SPEED USB
PORT 2 to 3
POWER
SWITCH
PORT 4
ANALOG
TRANSCEIVER
• ORIGINAL USB
• HI-SPEED USB
OVERCURRENT
DETECTION
LINK LEDS
DM1
16
DP1
19
60
LINK LEDS
61
47
PSW1_N AMB1_N
OC1_N
DM4
GRN1_N
48
DP4
25
50
51
PSW4_N AMB4_N
OC4_N
downstream
port 2 to port 3
26
downstream
port 4
GRN4_N
004aaa169
ISP1520
downstream
port 1
Fig 1. Block diagram.
20
OVERCURRENT
DETECTION
Hi-Speed USB hub controller
4 of 51
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15
POWER
SWITCH
ISP1520
Philips Semiconductors
Hi-Speed USB hub controller
7. Pinning information
49 NOOC
50 GRN4_N
51 AMB4_N
52 GRN3_N
53 AMB3_N
54 GRN2_N
55 AMB2_N
56 VREF(5V0)
57 VCC3
58 GND
59 GND
60 GRN1_N
61 AMB1_N
62 HUBGL_N
63 SCL
64 SDA
7.1 Pinning
SUSPEND
1
48 DP4
GND
2
47 DM4
DM0
3
46 GND
DP0
4
45 V
CC2
RPU
5
44 DP3
GND
6
43 DM3
RREF
7
42 GND
TEST_HIGH
8
V
CC1
41 V
ISP1520BD
9
CC4
40 GND
GND 10
39 V
CC1
VCC4 11
38 TEST_HIGH
ADOC 32
RESET_N 31
PSW2_N 30
OC2_N 29
PSW3_N 28
OC3_N 27
PSW4_N 26
OC4_N 25
33 XTAL1
VREF(5V0) 24
DP1 16
GND 22
34 XTAL2
VCC3 23
35 GND
DM1 15
GND 21
GND 14
PSW1_N 20
36 DM2
OC1_N 19
VCC2 13
TEST_LOW 17
37 DP2
TEST_HIGH 18
TEST_HIGH 12
004aaa164
Fig 2. Pin configuration.
7.2 Pin description
Table 2:
Pin description[1]
Symbol[2]
Pin
Type
Description
SUSPEND
1
O
suspend indicator output; HIGH indicates that the hub is in
the suspend mode
GND
2
-
ground supply
DM0
3
AI/O
upstream facing port D− connection (analog)
DP0
4
AI/O
upstream facing port D+ connection (analog)
RPU
5
AI
pull-up resistor connection; connect this pin through a
resistor of 1.5 kΩ ± 5 % to 3.3 V
GND
6
-
ground supply
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
9397 750 11689
Product data
Rev. 02 — 04 May 2004
5 of 51
ISP1520
Philips Semiconductors
Hi-Speed USB hub controller
Table 2:
Pin description[1]…continued
Symbol[2]
Pin
Type
Description
RREF
7
AI
reference resistor connection; connect this pin through a
resistor of 12 kΩ ± 1 % to an analog band gap ground
reference
TEST_HIGH
8
-
test pin; connect to 3.3 V
VCC1
9
-
analog supply voltage 1 (3.3 V)
GND
10
-
ground supply
VCC4
11
-
crystal and PLL supply voltage 4 (3.3 V)
TEST_HIGH
12
-
test pin; connect to 3.3 V
VCC2
13
-
transceiver supply voltage 2 (3.3 V)
GND
14
-
ground supply
DM1
15
AI/O
downstream facing port 1 D− connection (analog)[3]
DP1
16
AI/O
downstream facing port 1 D+ connection (analog)[3]
TEST_LOW
17
-
connect to GND
TEST_HIGH
18
-
connect to +5.0 V through a 10 kΩ resistor
OC1_N
19
AI/I
overcurrent sense input for downstream facing port 1
(analog/digital)
PSW1_N
20
I/O
output — power switch control output (open-drain) with an
internal pull-up resistor for downstream facing port 1
input — function of the pin when used as an input is given in
Table 5
GND
21
-
ground supply
GND
22
-
ground supply
VCC3
23
-
digital supply voltage 3 (3.3 V)
VREF(5V0)
24
-
reference voltage (5 V ± 5 %); used to power internal pull-up
resistors of PSWn_N pins and also for the analog
overcurrent detection
OC4_N
25
AI/I
overcurrent sense input for downstream facing port 4
(analog/digital)
PSW4_N
26
I/O
output — power switch control output (open-drain) with an
internal pull-up resistor for downstream facing port 4
input — function of the pin when used as an input is given in
Table 5
OC3_N
27
AI/I
overcurrent sense input for downstream facing port 3
(analog/digital)
PSW3_N
28
I/O
output — power switch control output (open-drain) with an
internal pull-up resistor for downstream facing port 3
input — function of the pin when used as an input is given in
Table 5
OC2_N
29
AI/I
overcurrent sense input for downstream facing port 2
(analog/digital)
PSW2_N
30
I/O
output — power switch control output (open-drain) with an
internal pull-up resistor for downstream facing port 2
input — function of the pin when used as an input is given in
Table 5
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
9397 750 11689
Product data
Rev. 02 — 04 May 2004
6 of 51
ISP1520
Philips Semiconductors
Hi-Speed USB hub controller
Table 2:
Pin description[1]…continued
Symbol[2]
Pin
Type
Description
RESET_N
31
I
asynchronous reset input; when reset is active, the internal
switch to the 1.5 kΩ external resistor is opened, and all pins
DPn and DMn are three-state; it is recommended that you
connect to VBUS through an RC circuit; refer to the
schematics in the ISP1520 Hub Demo Board User’s Guide
ADOC
32
I
analog or digital overcurrent detect selection input; a LOW
selects the digital mode and a HIGH (3.3 V) selects the
analog mode
XTAL1
33
I
crystal oscillator input (12 MHz)
XTAL2
34
O
crystal oscillator output (12 MHz)
GND
35
-
ground supply
DM2
36
AI/O
downstream facing port 2 D− connection (analog)[3]
DP2
37
AI/O
downstream facing port 2 D+ connection (analog)[3]
TEST_HIGH
38
-
test pin; connect to 3.3 V
VCC1
39
-
analog supply voltage 1 (3.3 V)
GND
40
-
ground supply
VCC4
41
-
crystal and PLL supply voltage 4 (3.3 V)
GND
42
-
ground supply
DM3
43
AI/O
downstream facing port 3 D− connection (analog)[4]
DP3
44
AI/O
downstream facing port 3 D+ connection (analog)[4]
VCC2
45
-
transceiver supply voltage 2 (3.3 V)
GND
46
-
ground supply
DM4
47
AI/O
downstream facing port 4 D− connection (analog)[4]
DP4
48
AI/O
downstream facing port 4 D+ connection (analog)[4]
NOOC
49
I
no overcurrent protection selection input; connect this pin to
HIGH (3.3 V) to select no overcurrent protection; if no
overcurrent is selected, all OCn_N pins must be connected
to VREF(5V0)
GRN4_N
50
I/O
output — green LED port indicator (open-drain) for
downstream facing port 4
input — function of the pin when used as an input is given in
Table 9
AMB4_N
51
I/O
output — amber LED port indicator (open-drain) for
downstream facing port 4
input — function of the pin when used as an input is given in
Table 8
GRN3_N
52
I/O
output — green LED port indicator (open-drain) for
downstream facing port 3
input — function of the pin when used as an input is given in
Table 9
AMB3_N
53
I/O
output — amber LED port indicator (open-drain) for
downstream facing port 3
input — function of the pin when used as an input is given in
Table 8
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
9397 750 11689
Product data
Rev. 02 — 04 May 2004
7 of 51
ISP1520
Philips Semiconductors
Hi-Speed USB hub controller
Table 2:
Pin description[1]…continued
Symbol[2]
Pin
Type
Description
GRN2_N
54
I/O
output — green LED port indicator (open-drain) for
downstream facing port 2
input — function of the pin when used as an input is given in
Table 9
AMB2_N
55
I/O
output — amber LED port indicator (open-drain) for
downstream facing port 2
input — function of the pin when used as an input is given in
Table 8
VREF(5V0)
56
-
reference voltage (5 V ± 5 %); used to power internal pull-up
resistors of PSWn_N pins and also for the analog
overcurrent detection
VCC3
57
-
digital supply voltage 3 (3.3 V)
GND
58
-
ground supply
GND
59
-
ground supply
GRN1_N
60
I/O
output — green LED port indicator (open-drain) for
downstream facing port 1
input — function of the pin when used as an input is given in
Table 9
AMB1_N
61
I/O
output — amber LED port indicator (open-drain) for
downstream facing port 1
input — function of the pin when used as an input is given in
Table 8
HUBGL_N
62
O
hub GoodLink LED indicator output; the LED is off until the
hub is configured; a transaction between the host and the
hub will blink the LED off for 100 ms; this LED is off in the
suspend mode (open-drain)
SCL
63
I/O
I2C-bus clock (open-drain); see Table 11
SDA
64
I/O
I2C-bus data (open-drain); see Table 11
[1]
[2]
[3]
[4]
The maximum current the ISP1520 can sink on a pin is 8 mA.
Symbol names ending with underscore N (for example, NAME_N) represent active LOW signals.
Downstream ports 1 and 2 cannot be disabled.
To disable a downstream port n, connect both pins DPn and DMn to VCC (3.3 V); unused ports must
be disabled in reverse order starting from port 4.
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
9397 750 11689
Product data
Rev. 02 — 04 May 2004
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ISP1520
Philips Semiconductors
Hi-Speed USB hub controller
8. Functional description
8.1 Analog transceivers
The integrated transceivers directly interface to USB lines. They can transmit and
receive serial data at high-speed (480 Mbit/s), full-speed (12 Mbit/s) and low-speed
(1.5 Mbit/s).
8.2 Hub controller core
The main components of the hub core are:
•
•
•
•
•
•
•
•
8.2.1
Philips Serial Interface Engine (SIE)
Routing logic
Transaction Translator (TT)
Mini-host controller
Hub repeater
Hub controller
Port controller
Bit clock recovery.
Philips serial interface engine
The Philips SIE implements the full USB protocol layer. It is completely hardwired for
speed and needs no firmware intervention. The functions of this block include:
synchronization, pattern recognition, parallel or serial conversion, bit (de-)stuffing,
CRC checking and generation, Packet IDentifier verification and generation, address
recognition, and handshake evaluation and generation.
8.2.2
Routing logic
The routing logic directs signaling to the appropriate modules (mini-host controller,
Original USB repeater and Hi-Speed USB repeater) according to the topology in
which the hub is placed.
8.2.3
Transaction translator
The TT acts as a go-between mechanism that links devices operating in the Original
USB mode and the Hi-Speed USB upstream mode. For the ‘IN’ direction, data is
concatenated in TT buffers till the proper length is reached, before the host takes the
transaction. In the reverse direction (OUT), the mini-host dispenses the data
contained in TT buffers over a period that fits into the Original USB bandwidth. This
continues until all outgoing data is emptied. TT buffers are used only on split
transactions.
8.2.4
Mini-host controller
The internal mini-host generates all the Original USB IN, OUT or SETUP tokens for
the downstream facing ports, while the upstream facing port is in the high-speed
mode. The responses from the Original USB devices are collected in TT buffers, until
the end of the complete split transaction clears the TT buffers.
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9397 750 11689
Product data
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ISP1520
Philips Semiconductors
Hi-Speed USB hub controller
8.2.5
Hub repeater
A hub repeater is responsible for managing connectivity on a per packet basis. It
implements packet signaling connectivity and resume connectivity. There are two
repeaters in the ISP1520: a Hi-Speed USB repeater and an Original USB repeater.
The only major difference between these two repeaters is the speed at which they
operate. When the hub is connected to an Original USB system, it automatically
switches itself to function as a pure Original USB hub.
8.2.6
Hub and port controllers
The hub controller provides status report. The port controller provides control for
individual downstream facing port; it controls the port routing module. Any port status
change will be reported to the host via the hub status change (interrupt) endpoint.
8.2.7
Bit clock recovery
The bit clock recovery circuit extracts the clock from the incoming USB data stream.
8.3 Phase-locked loop clock multiplier
A 12 MHz to 480 MHz clock multiplier PLL is integrated on-chip. This allows the use
of low-cost 12 MHz crystals. The low crystal frequency also minimizes
ElectroMagnetic Interference (EMI). No external components are required for the
operation of the PLL.
8.4 I2C-bus controller
A simple serial I2C-bus interface is provided to transfer vendor ID, product ID and
string descriptor from an external I2C-bus EEPROM (for example, Philips PCF8582 or
equivalent) or microcontroller. A master/slave I2C-bus protocol is implemented
according to the timing requirements as mentioned in the I2C-bus standard
specifications. The maximum data count during I2C-bus transfers for the ISP1520 is
256 bytes.
8.5 Overcurrent detection circuit
An overcurrent detection circuit is integrated on-chip. The main features of this circuit
are: self reporting, automatic resetting, low-trip time and low cost. This circuit offers
an easy solution at no extra hardware cost on the board.
8.6 GoodLink
Indication of a good USB connection is provided through GoodLink technology. An
LED can be directly connected to pin HUBGL_N via an external 330 Ω resistor.
During enumeration, the LED blinks on momentarily. After successful configuration,
the LED blinks off for 100 ms upon each transaction.
This feature provides a user-friendly indication of the status of the hub, the connected
downstream devices and the USB traffic. It is a useful diagnostics tool to isolate faulty
USB equipment and helps to reduce field support and hotline costs.
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
9397 750 11689
Product data
Rev. 02 — 04 May 2004
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ISP1520
Philips Semiconductors
Hi-Speed USB hub controller
8.7 Power-on reset
The ISP1520 has an internal Power-On Reset (POR) circuit.
The triggering voltage of the POR circuit is 2.03 V nominal. A POR is automatically
generated when VCC goes below the trigger voltage for a duration longer than 1 µs.
POR
VCC
2.03 V
≤ 683 µs
0V
t1
004aaa388
At t1: clock is running and available.
Fig 3. Power-on reset timing.
POR
EXTERNAL CLOCK
004aaa365
A
Stable external clock is to be available at A.
Fig 4. External clock with respect to power-on reset.
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
9397 750 11689
Product data
Rev. 02 — 04 May 2004
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ISP1520
Philips Semiconductors
Hi-Speed USB hub controller
9. Configuration selections
The ISP1520 is configured through I/O pins and, optionally, through an external
I2C-bus, in which case the hub can update its configuration descriptors as a master or
as a slave.
Table 3 shows the configuration parameters.
Table 3:
Configuration parameters
Mode and selection
Option
Configuration method
Pin control
Software control
Control pin
Reference
Affected field
Reference
Number of downstream 2 ports
facing ports
3 ports
4 ports
DM1/DP1 to
DM4/DP4
see Section 9.1.1
bNbrPorts0
see Table 22
Power switching mode
ganged
multiple ganged[1]
individual
PSW1_N to
PSW4_N
see Section 9.1.2
wHubCharacteristics:
bits D1 and D0
see Table 22
Overcurrent protection
mode
none
global[2]
multiple ganged
individual
NOOC and
OC1_N to
OC4_N
see Section 9.1.3
wHubCharacteristics:
bits D4 and D3
Non-removable ports
any port can be
non-removable
AMBn_N
see Section 9.1.4
wHubCharacteristics:
see Table 22
bit D2 (compound hub)
bPwrOn2PwrGood:
time interval
see Table 22
DeviceRemovable:
bit map
Port indicator support
[1]
[2]
no
yes
all GRNn_N
see Section 9.1.5
wHubCharacteristics:
bit D7
see Table 22
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).
9.1 Configuration through I/O pins
9.1.1
Number of downstream facing ports
To discount a physical downstream facing port, connect pins DP and DM of that
downstream facing port to VCC (3.3 V) starting from the highest port number (4).
The sum of physical ports configured is reflected in the bNbrPorts field.
Table 4:
Downstream facing port number pin configuration
Number of physical
downstream facing port
DM1/DP1
DM2/DP2
DM3/DP3
DM4/DP4
4
15 kΩ
pull-down
15 kΩ
pull-down
15 kΩ
pull-down
15 kΩ
pull-down
3
15 kΩ
pull-down
15 kΩ
pull-down
15 kΩ
pull-down
VCC
2
15 kΩ
pull-down
15 kΩ
pull-down
VCC
VCC
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9397 750 11689
Product data
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ISP1520
Philips Semiconductors
Hi-Speed USB hub controller
9.1.2
Power switching
Power switching of downstream ports can be done individually or ganged, where all
ports are simultaneously switched with one power switch. The ISP1520 supports both
modes, which can be selected using input PSWn_N; see Table 5.
Voltage drop requirements: Self-powered hubs are required to provide a minimum
of 4.75 V to its output port connectors at all legal load conditions. To comply with
Underwriters Laboratory Inc. (UL) safety requirements, the power from any port must
be limited to 25 W (5 A at 5 V). Overcurrent protection may be implemented on a
global or individual basis.
Assuming a 5 V ± 3 % power supply, the worst-case supply voltage is 4.85 V. This
only allows a voltage drop of 100 mV across the hub Printed-Circuit Board (PCB) to
each downstream connector. This includes a voltage drop across the:
•
•
•
•
Power supply connector
Hub PCB (power and ground traces, ferrite beads)
Power switch (FET on-resistance)
Overcurrent sense device.
The PCB resistance and power supply connector resistance may cause a drop of
25 mV, leaving only 75 mV as the voltage drop allowed across the power switch and
overcurrent sense device. The individual voltage drop components are shown in
Figure 5.
For global overcurrent detection, an increased voltage drop is needed for the
overcurrent sense device (in this case, a low-ohmic resistor). This can be realized by
using a special power supply of 5.1 V ± 3 %, as shown in Figure 6.
5V
+
POWER SUPPLY
± 3 % regulated −
voltage drop
75 mV
4.85 V (min)
voltage drop
25 mV
low-ohmic
PMOS switch
4.75 V (min)
hub board (1)
resistance
VBUS
D+
D−
ISP1520
power switch
(PSWn_N)
GND
downstream
port
connector
SHIELD
004aaa261
(1) Includes PCB traces, ferrite beads, and so on.
Fig 5. Typical voltage drop components in the self-powered mode using individual overcurrent detection.
5.1 V KICK-UP +
POWER SUPPLY
± 3 % regulated −
voltage drop
4.95 V (min) 100 mV
low-ohmic
sense resistor
for overcurrent
detection
voltage drop
75 mV
low-ohmic
PMOS switch
ISP1520
power switch
(PSWn_N)
voltage drop
25 mV
4.75 V (min)
hub board (1)
resistance
VBUS
D+
D−
GND
downstream
port
connector
SHIELD
004aaa262
(1) Includes PCB traces, ferrite beads, and so on.
Fig 6. Typical voltage drop components in the self-powered mode using global overcurrent detection.
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Hi-Speed USB hub controller
PSWn_N pins have integrated weak pull-up resistors inside the chip.
Table 5:
9.1.3
Power switching mode: pin configuration
Power switching mode
PSW1_N
PSW2_N
PSW3_N
PSW4_N
Ganged
internal
pull-up
ground
ground
ground
Individual
internal
pull-up
internal
pull-up
internal
pull-up
internal
pull-up
Overcurrent protection mode
The ISP1520 supports all overcurrent protection modes: none, global and individual.
No overcurrent protection mode reporting is selected when pin NOOC = HIGH.
Global and individual overcurrent protection modes are selected using pins PSWn_N,
following the power switching modes selection scheme; see Table 6.
For the global overcurrent protection mode, only PSW1_N and OC1_N are active;
that is, in this mode, the remaining overcurrent indicator pins are disabled. To inhibit
the analog overcurrent detection, the OC_N pins must be connected to VREF(5V0).
Table 6:
Overcurrent protection mode pin configuration
Power switching mode
NOOC
PSW1_N
PSW2_N
PSW3_N
PSW4_N
None
HIGH
ground
ground
ground
ground
Global
LOW
internal
pull-up
ground
ground
ground
Individual
LOW
internal
pull-up
internal
pull-up
internal
pull-up
internal
pull-up
Both analog and digital overcurrent modes are supported; see Table 7.
For digital overcurrent detection, the normal digital TTL level is accepted on the
overcurrent input pins. For analog overcurrent detection, the threshold is given in the
DC characteristics. In this mode, to filter out false overcurrent conditions because of
in rush and spikes, a dead time of 15 ms is built into the IC, that is, overcurrent must
persist for 15 ms before it is reported to the host.
Table 7:
9.1.4
Overcurrent detection mode selection pin configuration
Pin ADOC
Mode selection
Description
3.3 V
analog
threshold ∆Vtrip
Ground
digital
normal digital TTL level
Non-removable port
A non-removable port, by definition, is a port that is embedded inside the hub
application box and is not externally accessible. The LED port indicators
(pins AMBn_N) of such a port are not used. Therefore, the corresponding amber LED
port indicators are disabled to signify that the port is non-removable; see Table 8.
More than one non-removable port can be specified by appropriately connecting the
corresponding amber LED indicators. At least one port should, however, be left as a
removable port.
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ISP1520
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Hi-Speed USB hub controller
The detection of any non-removable port sets the hub descriptor into a compound
hub.
Table 8:
9.1.5
Non-removable port pin configuration
AMBn_N (n = 1 to 4)
Non-removable port
Ground
non-removable
Pull-up with amber LED
removable
Port indicator support
The port indicator support can be disabled by grounding all green port indicators (all
pins GRNn_N); see Table 9. This is a global feature. It is not possible to disable port
indicators for only one port.
Table 9:
Port indicator support: pin configuration
GRN1_N to GRN4_N
Port indicator support
Ground
not supported
LED pull-up green LED for at least one port
supported
9.2 Device descriptors and string descriptors settings using I2C-bus
9.2.1
Background information on I2C-bus
The I2C-bus is suitable for bi-directional communication between ICs or modules. It
consists of two bi-directional lines: SDA for data signals and SCL for clock signals.
Both these lines must be connected to a positive supply voltage through a pull-up
resistor.
The basic I2C-bus protocol is defined as:
• Data transfer is initiated only when the bus is not busy.
• Changes in the data line occur when the clock is LOW and must be stable when
the clock is HIGH. Any changes in data lines when the clock is HIGH will be
interpreted as control signals.
Different conditions on I2C-bus: The I2C-bus protocol defines the following
conditions:
Not busy — both SDA and SCL remain HIGH
START — a HIGH-to-LOW transition on SDA, while SCL is HIGH
STOP — a LOW-to-HIGH transition on SDA, while SCL is HIGH
Data valid — after a START condition, data on SDA must be stable for the duration of
the HIGH period of SCL.
Data transfer: The master initiates each data transfer using a START condition and
terminates it by generating a STOP condition. To facilitate the next byte transfer, each
byte of data must be acknowledged by the receiver. The acknowledgement is done by
pulling the SDA line LOW on the ninth bit of the data. An extra clock pulse needs to
be generated by the master to accommodate this bit.
For more detailed information on the operation of the bus, refer to The I2C-bus
specification.
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Hi-Speed USB hub controller
I2C-bus address: The address of the ISP1520 is given in Table 10.
Table 10:
I2C-bus slave address
MSB
Bit
Value
9.2.2
Slave address
LSB
A7
A6
A5
A4
A3
A2
A1
R/W
0
0
1
1
0
1
0
0/1
Architecture of configurable hub descriptors
MICROCONTROLLER
SERIAL EEPROM
I2C-bus
signature
match
MASTER/SLAVE
I2C-BUS INTERFACE
RAM
(256 bytes)
HUB CORE
DESCRIPTOR
GENERATOR
INTERFACE
MUX
ROM
(256 bytes)
MLD711
The I2C-bus cannot be shared between the EEPROM and the external microcontroller.
Fig 7. Configurable hub descriptors.
The configurable hub descriptors can be masked in the internal ROM memory; see
Figure 7. These descriptors can also be supplied from an external EEPROM or a
microcontroller. The ISP1520 implements both the master and slave I2C-bus
controllers. The information from the external EEPROM or the microcontroller is
transferred into the internal RAM during the power-on reset. A signature word is used
to identify correct descriptors. If the signature matches, the content of the RAM is
chosen instead of the ROM.
When the external microcontroller mode is selected and while the external
microcontroller is writing to the internal RAM, any request to configurable descriptors
will be responded to with a Not AcKnowledge (NAK). There is no specified time-out
period for the NAK signal. This data is then passed to the host during the
enumeration process.
The three configuration methods are selected by connecting pins SCL and SDA in the
manner given in Table 11.
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Hi-Speed USB hub controller
Table 11:
9.2.3
Configuration method
Configuration method
SCL
SDA
Internal ROM
ground
ground
External EEPROM
2.2 to 4.7 kΩ pull-up
2.2 to 4.7 kΩ pull-up
External microcontroller
driven LOW by the
microcontroller during reset
2.2 to 4.7 kΩ pull-up
ROM or EEPROM map
00H
Signature
02H
Device Descriptor
0AH
Language ID
10H
String Descriptor
(first Language ID):
iManufacturer string
iProduct string
iSerial Number string
7FH
80H
FFH
String Descriptor
(second Language ID):
iManufacturer string
iProduct string
iSerial Number string
MLD714
Fig 8. ROM or EEPROM map.
Remark: A 128-byte EEPROM supports one language ID only, and a 256-byte
EEPROM supports two language IDs.
9.2.4
ROM or EEPROM detailed map
Table 12:
ROM or EEPROM detailed map
Address Content
(Hex)
Default Example Comment
(Hex)
(Hex)
Signature descriptor
00
signature (low
55
-
01
signature (high)
AA
-
signature to signify valid data comment
Device descriptor
02
idVendor (low)
CC
-
Philips Semiconductors vendor ID
03
idVendor (high)
04
-
04
idProduct (low)
20
-
05
idProduct (high)
15
-
06
bcdDevice (low)
00
-
07
bcdDevice (high)
02
-
08
RSV, iSN, iP, iM
-
00
if all the three strings are supported, the
value of this byte is 39H
09
reserved
-
FF
-
ISP1520 product ID
device release; silicon revision
increments this value
String descriptor Index 0 (language ID)
0A
bLength[1]
-
06
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two language ID support
Rev. 02 — 04 May 2004
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ISP1520
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Hi-Speed USB hub controller
Table 12:
ROM or EEPROM detailed map…continued
Address Content
(Hex)
Default Example Comment
(Hex)
(Hex)
0B
bDescriptorType
-
03[2]
STRING
0C
wLANGID[0]
-
09
-
04
LANGID code zero (first language ID)
(English—USA in this example)
-
09
-
08
0D
0E
wLANGID[1]
0F
LANGID code one (second language ID)
(English—UK in this example)
String descriptor Index 1 (iManufacturer)[3]
10
bLength
-
2E
string descriptor length (manufacturer ID)
STRING
11
bDescriptorType
-
03[2]
12 13
bString
-
50 00
P of Philips
14 15
-
68 00
h
16 17
-
69 00
i
18 19
-
6C 00
l
1A 1B
-
69 00
i
1C 1D
-
70 00
p
1E 1F
-
73 00
s
20 21
-
20 00
22 23
-
53 00
S of Semiconductors
24 25
-
65 00
e
26 27
-
6D 00
m
28 29
-
69 00
i
2A 2B
-
63 00
c
2C 2D
-
6F 00
o
2E 2F
-
6E 00
n
30 31
-
64 00
d
32 33
-
75 00
u
34 35
-
63 00
c
36 37
-
74 00
t
38 39
-
6F 00
o
3A 3B
-
72 00
r
3C 3D
-
73 00
s
String descriptor Index 2 (iProduct)
3E
bLength
-
10
string descriptor length (product ID)
3F
bDescriptorType
-
03[2]
STRING
40 41
bString
-
49 00
I of ISP1520
42 43
-
53 00
S
44 45
-
50 00
P
46 47
-
31 00
1
48 49
-
35 00
5
4A 4B
-
32 00
2
4C 4D
-
30 00
0
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ISP1520
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Hi-Speed USB hub controller
Table 12:
ROM or EEPROM detailed map…continued
Address Content
(Hex)
Default Example Comment
(Hex)
(Hex)
String descriptor Index 3 (iSerialNumber)
Remark: If supported, this string must be unique.
4E
bLength
-
3A
string descriptor length (serial number)
STRING
4F
bDescriptorType
-
03[2]
50 51
bString
-
39 00
9 of 947337877678 = wired support
52 53
-
34 00
4
54 55
-
37 00
7
56 57
-
33 00
3
58 59
-
33 00
3
5A 5B
-
37 00
7
5C 5D
-
38 00
8
5E 5F
-
37 00
7
60 61
-
37 00
7
62 63
-
36 00
6
64 65
-
37 00
7
66 67
-
38 00
8
68 69
-
20 00
6A 6B
-
3D 00
6C 6D
-
20 00
6E 6F
-
77 00
w
70 71
-
69 00
i
72 73
-
72 00
r
74 75
-
65 00
e
76 77
-
64 00
d
78 79
-
20 00
7A 7B
-
73 00
s
7C 7D
-
75 00
u
7E 7F
-
70 00
p
80 81
-
70 00
p
82 83
-
6F 00
o
84 85
-
72 00
r
86 87
-
74 00
t
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Product data
=
Rev. 02 — 04 May 2004
19 of 51
ISP1520
Philips Semiconductors
Hi-Speed USB hub controller
Table 12:
ROM or EEPROM detailed map…continued
Address Content
(Hex)
Default Example Comment
(Hex)
(Hex)
String descriptor Index 1 (iManufacturer) second language
88
bLength
-
2E
string descriptor length (manufacturer ID)
STRING
89
bDescriptorType
-
03[2]
8A 8B
bString
-
50 00
P of Philips
8C 8D
-
68 00
h
8E 8F
-
69 00
i
90 91
-
6C 00
l
92 93
-
69 00
i
94 95
-
70 00
p
96 97
-
73 00
s
98 99
-
20 00
9A 9B
-
53 00
S of Semiconductors
9C 9D
-
65 00
e
9E 9F
-
6D 00
m
A0 A1
-
69 00
i
A2 A3
-
63 00
c
A4 A5
-
6F 00
o
A6 A7
-
6E 00
n
A8 A9
-
64 00
d
AA AB
-
75 00
u
AC AD
-
63 00
c
AE AF
-
74 00
t
B0 B1
-
6F 00
o
B2 B3
-
72 00
r
B4 B5
-
73 00
s
-
10[1]
string descriptors (product ID)
STRING
String descriptor Index 2 (iProduct)
B6
bLength
B7
bDescriptorType
-
03[2]
B8 B9
bString
-
49 00
I of ISP1520
BA BB
-
53 00
S
BC BD
-
50 00
P
BE BF
-
31 00
1
C0 C1
-
35 00
5
C2 C3
-
32 00
2
C4 C5
-
30 00
0
String descriptor Index 3 (iSerialNumber)
C6
bLength
-
16[1]
string descriptors (serial number)
STRING
C7
bDescriptorType
-
03[2]
C8 C9
bString
-
36 00
6 of 6568824022
-
35 00
5
CA CB
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Hi-Speed USB hub controller
Table 12:
ROM or EEPROM detailed map…continued
Address Content
(Hex)
Default Example Comment
(Hex)
(Hex)
CC CD
-
36 00
6
CE CF
-
38 00
8
D0 D1
-
38 00
8
D2 D3
-
32 00
2
D4 D5
-
34 00
4
D6 D7
-
30 00
0
D8 D9
-
32 00
2
DA DB
-
32 00
2
DC DD
-
FF FF
DE DF
-
FF FF
E0 E1
-
FF FF
E2 E3
-
FF FF
E4 E5
-
FF FF
E6 E7
-
FF FF
E8 E9
-
FF FF
EA EB
-
FF FF
EC ED
-
FF FF
EE EF
-
FF FF
F0 F1
-
FF FF
F2 F3
-
FF FF
F4 F5
-
FF FF
F6 F7
-
FF FF
F8 F9
-
FF FF
FA FB
-
FF FF
FC FD
-
FF FF
FE
-
FF
FF
-
FF
[1]
[2]
[3]
If this string descriptor is not supported, this bLength field must be programmed with the value 02H.
If this string descriptor is not supported, this bDescriptorType field must be used (programmed with
any value, for example, 03H).
String descriptor index (iManufacturer) starts from the address 0EH for one language ID support and
10H for two languages ID support.
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upper boundary of all string descriptors
Rev. 02 — 04 May 2004
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Hi-Speed USB hub controller
10. Hub controller description
Each USB device is composed of several independent logic endpoints. An endpoint
acts as a terminus of communication flow between the host and the device. At design
time, each endpoint is assigned a unique number (endpoint identifier; see Table 13).
The combination of the device address (given by the host during enumeration), the
endpoint number and the transfer direction allows each endpoint to be uniquely
referenced.
The ISP1520 has two endpoints: endpoint 0 (control) and endpoint 1 (interrupt).
Table 13:
Hub endpoints
Function
Endpoint
identifier
Transfer type
Direction [1]
Maximum packet
size (bytes)
Hub ports 0 to 4
0
control
OUT
64
IN
64
1
interrupt
IN
1
[1]
IN: input for the USB host; OUT: output from the USB host.
10.1 Endpoint 0
According to the USB specification, all devices must implement a default control
endpoint. This endpoint is used by the host to configure the USB device. It provides
access to the device configuration and allows generic USB status and control access.
The ISP1520 supports the following descriptor information through its control
endpoint 0:
•
•
•
•
•
•
•
Device descriptor
Device_qualifier descriptor
Configuration descriptor
Interface descriptor
Endpoint descriptor
Hub descriptor
Other_speed_configuration descriptor.
The maximum packet size of this endpoint is 64 bytes.
10.2 Endpoint 1
Endpoint 1 can be accessed only after the hub has been configured by the host (by
sending the Set Configuration command). It is used by the ISP1520 to send the
status change information to the host.
Endpoint 1 is an interrupt endpoint. The host polls this endpoint once every 255 ms.
After the hub is configured, an IN token is sent by the host to request the port change
status. If the hub detects no change in the port status, it returns a NAK to this
request, otherwise the Status Change byte is sent. Table 14 shows the content of the
change byte.
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Hi-Speed USB hub controller
Table 14:
Status Change byte: bit allocation
Bit
Name
Value Description
0
Hub Status Change
0
no change in the hub status
1
change in the hub status detected
1 to 4
Port n Status Change
0
no change in the status of port n (n = 1 to 4)
1
change in the status of port n (n = 1 to 4)
-
not used
5 to 7
-
11. Descriptors
The ISP1520 hub controller supports the following standard USB descriptors:
•
•
•
•
•
•
•
Device
Device_qualifier
Other_speed_configuration
Configuration
Interface
Endpoint
Hub.
The hub returns different descriptors based on the mode of operation: full-speed or
high-speed.
Table 15:
Device descriptor
Offset
(bytes)
Field name
Value (Hex)
0
bLength
12
12
descriptor length = 18 bytes
1
bDescriptorType
01
01
type = DEVICE
2
bcdUSB
00
00
see USB specification Rev. 2.0
02
02
Full-speed
3
Comments
High-speed
4
bDeviceClass
09
09
HUB_CLASSCODE
5
bDeviceSubClass
00
00
HubSubClassCode
6
bDeviceProtocol
00
01
HubProtocolHSpeedOneTT
7
bMaxPacketSize0
40
40
packet size = 64 bytes
8
idVendor
9
10
idProduct
11
12
bcdDevice
13
CC
CC
04
04
Philips Semiconductors vendor ID (04CC); can be
customized
20
20
the ISP1520 product ID; can be customized
15
15
00
00
02
02
device ID; can be customized
14
iManufacturer
01
01
can be customized
15
iProduct
02
02
can be customized
16
iSerialNumber
03
03
can be customized; this value must be unique
17
bNumConfigurations 01
01
one configuration
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Hi-Speed USB hub controller
Table 16:
Device_qualifier descriptor
Offset
(bytes)
Field name
Value (Hex)
0
bLength
0A
0A
descriptor length = 10 bytes
1
bDescriptorType
06
06
type = DeviceQualifierType
2
bcdUSB
00
00
see USB specification Rev. 2.0
02
02
Full-speed
3
Comments
High-speed
4
bDeviceClass
09
09
HUB_CLASSCODE
5
bDeviceSubClass
00
00
HubSubClassCode
6
bDeviceProtocol
00
01
HubProtocolHSpeedOneTT
7
bMaxPacketSize0
40
40
packet size = 64 bytes
8
bNumConfigurations 01
01
number of configurations
Table 17:
Other_speed_configuration descriptor
Offset
(bytes)
Field name
Value (Hex)
Full-speed
High-speed
0
bLength
09
09
descriptor length = 9 bytes
1
bDescriptorType
07
07
type = OtherSpeedConfigurationType
2
wTotalLength
19
19
TotalConfByte
3
Comments
00
00
4
bNumInterfaces
01
01
-
5
bConfigurationValue
01
01
-
6
iConfiguration
00
00
no string supported
7
bmAttributes
E0
E0
self-powered
A0
A0
others
00
00
self-powered
8
bMaxPower
Table 18:
Configuration descriptor
Offset
(bytes)
Field name
0
Value (Hex)
Comments
Full-speed
High-speed
bLength
09
09
descriptor length = 9 bytes
1
bDescriptorType
02
02
type = CONFIGURATION
2
wTotalLength
19
19
00
00
total length of configuration, interface and endpoint
descriptors = 25 bytes
3
4
bNumInterfaces
01
01
one interface
5
bConfigurationValue
01
01
configuration value = 1
6
iConfiguration
00
00
no configuration string descriptor
7
bmAttributes
E0
E0
self-powered
8
bMaxPower[1]
00
00
self-powered
[1]
Value in units of 2 mA.
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Hi-Speed USB hub controller
Table 19:
Offset
(bytes)
Interface descriptor
Field name
Value (Hex)
Full-speed
Comments
High-speed
0
bLength
09
09
descriptor length = 9 bytes
1
bDescriptorType
04
04
type = INTERFACE
2
bInterfaceNumber
00
00
-
3
bAlternateSetting
00
00
no alternate setting
4
bNumEndpoints
01
01
status change (interrupt) endpoint
5
bInterfaceClass
09
09
HUB_CLASSCODE
6
bInterfaceSubClass
00
00
HubSubClassCode
7
bInterfaceProtocol
00
00
-
8
bInterface
00
00
no interface string descriptor
Table 20:
Endpoint descriptor
Offset
(bytes)
Field name
Value (Hex)
Full-speed
High-speed
0
bLength
07
07
descriptor length = 7 bytes
1
bDescriptorType
05
05
type = ENDPOINT
2
bEndpointAddress
81
81
endpoint 1 at the address number 1
3
bmAttributes
03
03
interrupt endpoint
4
wMaxPacketSize
01
01
packet size = 1 byte
00
00
FF
0C
5
6
bInterval
Table 21:
Offset
(bytes)
Comments
polling interval
Hub descriptor
Field name
Value (Hex)
Full-speed
Comments
High-speed
0
bDescLength
09
09
descriptor length = 9 bytes
1
bDescriptorType
29
29
type = HUB
2
bNbrPorts
04
04
03
03
number of enabled downstream facing ports; selectable by
DP/DM strapping
3
02
02
wHubCharacteristics A9
A9
00
00
32
32
4
see Table 22
5
bPwrOn2PwrGood[1]
6
bHubContrCurrent
64
64
-
7
DeviceRemovable
00
00
four downstream facing ports, no embedded port
8
PortPwrCtrlMask
FF
FF
-
[1]
ganged or individual mode = 100 ms
Value in units of 2 ms.
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Hi-Speed USB hub controller
Table 22:
wHubCharacteristics bit description
Bit
Function
D0, D1
logical power switching mode 00
D2
D3, D4
Value Description
compound hub selection
overcurrent protection mode
ganged
01
individual and multiple ganged
11
-
0
non-compound
1
compound
00
global
01
individual and multiple ganged
10
none
11
-
D5
-
-
-
D6
-
-
-
D7
port indicator
0
global feature
1
-
12. Hub requests
The hub must react to a variety of requests initiated by the host. Some requests are
standard and are implemented by any USB device whereas others are hub-class
specific requests.
12.1 Standard USB requests
Table 23 shows the supported standard USB requests.
Table 23:
Standard USB requests
bmRequestType
byte 0
(bits 7 to 0)
bRequest wValue
byte 1
bytes 2, 3
(hex)
(hex)
wIndex
bytes 4, 5
(hex)
wLength
bytes 6, 7
(hex)
Data response
0000 0000
05
device
address[1]
00, 00
00, 00
none
Get Configuration
1000 0000
08
00, 00
00, 00
01, 00
configuration value
Set Configuration (0)
0000 0000
09
00, 00
00, 00
00, 00
none
Set Configuration (1)
0000 0000
09
01, 00
00, 00
00, 00
none
Get Configuration
Descriptor
1000 0000
06
00, 02
00, 00
length[2]
configuration interface
and endpoint descriptors
Get Device Descriptor
1000 0000
06
00, 01
00, 00
length[2]
device descriptor
Get String Descriptor (0) 1000 0000
06
03, 00
00, 00
length[2]
language ID descriptor
00, 00
length[2]
manufacturer string
00, 00
length[2]
product string
00, 00
length[2]
serial number string
Request
Address
Set Address
Configuration
Descriptors
Get String Descriptor (1) 1000 0000
Get String Descriptor (2) 1000 0000
Get String Descriptor (3) 1000 0000
06
06
06
03, 01
03, 02
03, 03
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Hi-Speed USB hub controller
Table 23:
Standard USB requests…continued
bmRequestType
byte 0
(bits 7 to 0)
bRequest wValue
byte 1
bytes 2, 3
(hex)
(hex)
wIndex
bytes 4, 5
(hex)
wLength
bytes 6, 7
(hex)
Data response
Clear Device Feature
(Remote_ Wakeup)
0000 0000
01
01, 00
00, 00
00, 00
none
Clear Endpoint (1)
Feature (Halt/Stall)
0000 0010
01
00, 00
81, 00
00, 00
none
Set Device Feature
(Remote_ Wakeup)
0000 0000
03
01, 00
00, 00
00, 00
none
Set Endpoint (1)
Feature (Halt/Stall)
0000 0010
03
00, 00
81, 00
00, 00
none
Get Device Status
1000 0000
00
00, 00
00, 00
02, 00
device status
Get Interface Status
1000 0001
00
00, 00
00, 00
02, 00
zero
02, 00
endpoint 0 status
02, 00
endpoint 1 status
Request
Feature
Status
Get Endpoint (0) Status
1000 0010
00
00, 00
00/80,
Get Endpoint (1) Status
1000 0010
00
00, 00
81, 00
[1]
[2]
[3]
00[3]
Device address: 0 to 127.
Returned value in bytes.
MSB specifies endpoint direction: 0 = OUT, 1 = IN. The ISP1520 accepts either value.
12.2 Hub class requests
Table 24 shows the hub class requests.
Table 24:
Hub class requests
bmRequestType
byte 0
(bits 7 to 0)
bRequest
byte 1
(hex)
wValue
bytes 2, 3
(hex)
wLength
bytes 6, 7
(hex)
Data
1010 0000
06
descriptor type 00, 00
and index
length[2]
descriptor
Clear Hub Feature
(C_LOCAL_POWER)
0010 0000
01
00, 00
00, 00
00, 00
none
Clear Port Feature
0010 0011
01
feature[3], 00
port[4], 00
00, 00
none
0010 0011
03
feature[3],
port[4],
00, 00
none
Get Hub Status
1010 0000
00
00, 00
00, 00
04, 00
hub status and
change status
Get Port Status
1010 0011
00
00, 00
port[4], 00
04, 00
port status and
change status
ClearTTBuffer
0010 0011
08
Dev_Addr,
EP_nr
01, 00
00, 00
none
ResetTT
0010 0000
09
00, 00
01, 00
00, 00
none
Request
wIndex
bytes 4, 5
(hex)
Descriptor
Get Hub Descriptor
Feature
Set Port Feature
00
00
Status
TT
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Hi-Speed USB hub controller
Table 24:
Hub class requests…continued
Request
bmRequestType
byte 0
(bits 7 to 0)
bRequest
byte 1
(hex)
wValue
bytes 2, 3
(hex)
wIndex
bytes 4, 5
(hex)
wLength
bytes 6, 7
(hex)
Data
GetTTState
1010 0011
10
TT-flags
01, 00
-[1]
TT state
StopTT
0010 0011
11
00, 00
01, 00
00, 00
none
0010 0011
03
15, 00
port[4], 01
00, 00
none
15, 00
port[4],
02
00, 00
none
15, 00
port[4],
03
00, 00
none
Test modes
Test_J
Test_K
Test_SE0_NAK
0010 0011
03
0010 0011
03
Test_Packet
0010 0011
03
15, 00
port[4],
04
00, 00
none
Test_Force_Enable
0010 0011
03
15, 00
port[4], 05
00, 00
none
[1]
[2]
[3]
[4]
Returns vendor-specific data.
Returned value in bytes.
Feature selector value; see Table 25.
Downstream port identifier: 1 to N with N is number of enabled ports (2 to 4).
Table 25:
Hub class feature selector
Feature selector name
Recipient
Value
C_HUB_LOCAL_POWER
hub
00
C_HUB_OVER_CURRENT
hub
01
PORT_CONNECTION
port
00
PORT_ENABLE
port
01
PORT_SUSPEND
port
02
PORT_OVER_CURRENT
port
03
PORT_RESET
port
04
PORT_POWER
port
08
PORT_LOW_SPEED
port
09
C_PORT_CONNECTION
port
16
C_PORT_ENABLE
port
17
C_PORT_SUSPEND
port
18
C_PORT_OVER_CURRENT
port
19
C_PORT_RESET
port
20
PORT_TEST
port
21
PORT_INDICATOR
port
22
12.3 Detailed responses to hub requests
12.3.1
Get configuration
This request returns the configuration value of the device. This request returns one
byte of data; see Table 26.
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Table 26:
12.3.2
Get hub configuration response
Bit
Function
Value
Description
0
configuration value
0
device is not configured
1
device is configured
1 to 7
reserved
0
-
Get device status
This request returns two bytes of data; see Table 27.
Table 27:
Bit
Function
Value
Description
0
self-powered
1
self-powered
1
remote wake-up
0
disabled
1
enabled
0
-
2 to 15
12.3.3
Get device status response
reserved
Get interface status
The request returns two bytes of data; see Table 28.
Table 28:
12.3.4
Get interface status response
Bit
Function
Value
Description
0 to 15
reserved
0
-
Get endpoint status
The request returns two bytes of data; see Table 29.
Table 29:
Get endpoint status response
Bit
Function
Value
Description
0
halt
0
endpoint is not halted
1
endpoint is halted
0
-
1 to 15
12.3.5
reserved
Get hub status
The request returns four bytes of data; see Table 30.
Table 30:
Get hub status response
Bit
Function
0
local power source
1
2 to 15
overcurrent indicator
reserved
Description
0
local power supply good
1
local power supply lost (inactive)
0
no overcurrent condition currently exists
1
a hub overcurrent condition exists
0
-
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Hi-Speed USB hub controller
Table 30:
12.3.6
Get hub status response…continued
Bit
Function
Value
Description
16
local power status change
0
no change in the local power status
1
local power status has changed
0
no change in overcurrent
1
overcurrent status has changed
0
-
17
overcurrent indicator change
18 to 31
reserved
Get port status
This request returns four bytes of data. The first word contains the port status bits
(wPortStatus), and the next word contains the port status change bits
(wPortChange). The contents of wPortStatus is given in Table 31, and the contents of
wPortChange is given in Table 32.
Table 31:
Get port status response (wPortStatus)
Bit
Function
0
current connect status
1
2
3
4
Value
port enabled or disabled
suspend
overcurrent indicator
reset
0
no device is present
1
a device is present on this port
0
port is disabled
1
port is enabled
0
port is not suspended
1
port is suspended
0
no overcurrent condition exists
1
an overcurrent condition exists
0
reset signaling is not asserted
1
reset signaling is asserted
5 to 7
reserved
0
-
8
port power
0
port is in the powered-off state
1
port is not in the powered-off state
9
low-speed device attached
0
full-speed or high-speed device is
attached
1
low-speed device is attached
full-speed device is attached
10
high-speed device attached
0
1
high-speed device is attached
11
port test mode
0
not in the port test mode
1
in the port test mode
0
displays default colors
12
port indicator control
13 to 15 reserved
1
displays software controlled color
0
-
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Table 32:
Get port status change response (wPortChange)
Bit
Function
Value
Description
0
connect status change
0
no change in the current connect status
1
change in the current connect status
1
port enable or disable change
0
port is enabled
1
port is disabled
0
no change
1
resume complete
0
no change in the overcurrent indicator
1
change in the overcurrent indicator
0
no change
1
reset complete
0
-
2
suspend change
3
overcurrent indicator change
4
reset change
5 to 15
reserved
12.4 Various get descriptors
bmRequestType — 10000000B
bmRequest — GET_DESCRIPTOR = 6
Table 33:
Get descriptor request
Request name
wValue
wIndex
Data
Descriptor index
Descriptor type
Zero/Language ID
Get device
descriptor
00
01
0
device descriptor
Get configuration
descriptor
00
02
0
configuration interface and
endpoint descriptors
Get language ID
string descriptor
00
03
0
language ID support string
Get manufacturer
string descriptor
01
03
n
manufacturer string in LANGID n
Get product string
descriptor
02
03
n
product string in LANGID n
Get serial number
string descriptor
03
03
n
serial number string in LANGID n
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13. Limiting values
Table 34: Absolute maximum ratings
In accordance with the Absolute Maximum Rating System (IEC 60134).
Symbol
Parameter
VCC
supply voltage 3.3 V
VREF(5V0)
input reference voltage 5.0 V
Conditions
VI(5V0)
input voltage on 5 V buffers
3.0 V < VCC < 3.6 V
VI(3V3)
input voltage on 3.3 V buffers
3.0 V < VCC < 3.6 V
VO(3V3)
output voltage on 3.3 V buffers
Ilu
latch-up current
electrostatic discharge voltage
Vesd
VI < 0 or VI > VCC
Max
Unit
−0.5
+4.6
V
−0.5
+5.25
V
−0.5
+6.0
V
−0.5
+4.6
V
−0.5
+4.6
V
-
100
mA
on pins DM1 to DM4, DP1 to DP4,
OC1_N to OC4_N, and all
VREF(5V0) and GND pins; ILI < 1 µA
[2][3]
−4000
+4000
V
on all other pins; ILI < 1 µA
[2][3]
−2000
+2000
V
−40
+125
°C
Min
Typ
Max
Unit
3.0
3.3
3.6
V
4.5
5.0
5.25
V
V
storage temperature
Tstg
[1]
[2]
[3]
[1]
Min
Valid only when supply voltage is present.
Test method available on request.
Equivalent to discharging a 100 pF capacitor via a 1.5 kΩ resistor (Human Body Model).
14. Recommended operating conditions
Table 35:
Recommended operating ranges
Symbol
Parameter
VCC
supply voltage 3.3 V
VREF(5V0)
input reference voltage 5 V
VI(3V3)
input voltage on 3.3 V pins
0
-
VCC
VI(5V0)
input voltage on 5 V tolerant pins
0
-
VREF(5V0) V
Tamb
operating temperature
0
-
70
[1]
[1]
°C
All internal pull-up resistors are connected to this voltage.
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15. Static characteristics
Table 36: Static characteristics: supply pins
VCC = 3.0 V to 3.6 V; Tamb = 0 °C to 70 °C; unless otherwise specified.
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
Full-speed
IREF(5V0)
ICC(tot)
supply current 5 V
total supply current 3.3 V
-
0.5
-
mA
ICC(tot) = ICC1 + ICC2 + ICC3 + ICC4
[1]
-
91
-
mA
suspend mode; internal clock stopped
[2]
-
0.5
-
mA
no device connected
-
136.3
-
mA
1 active device connected
-
180
-
mA
2 active devices connected
-
221
-
mA
3 active devices connected
-
256
-
mA
4 active devices connected
-
288
-
mA
Min
Typ
Max
Unit
High-speed
ICC(tot)
[1]
[2]
total supply current 3.3 V
Irrespective of the number of devices connected, the value of ICC is always 91 mA in full-speed.
Including Rpu drop current.
Table 37: Static characteristics: digital input and outputs[1]
VCC = 3.0 V to 3.6 V; Tamb = 0 °C to 70 °C; unless otherwise specified.
Symbol
Parameter
Conditions
Digital input pins
VIL
LOW-level input voltage
-
-
0.8
V
VIH
HIGH-level input voltage
2.0
-
-
V
ILI
input leakage current
−1
-
+1
µA
Schmitt-trigger input pins
Vth(LH)
positive-going threshold voltage
1.4
-
1.9
V
Vth(HL)
negative-going threshold voltage
0.9
-
1.5
V
Vhys
hysteresis voltage
0.4
-
0.7
V
-
84
-
mV
Overcurrent detection pins OC1_N to OC4_N
∆Vtrip
overcurrent detection trip voltage
∆V = VCC − VOCn_N
Digital output pins
VOL
LOW-level output voltage
-
-
0.4
V
VOH
HIGH-level output voltage
2.4
-
-
V
−1
-
+1
µA
Open-drain output pins
OFF-state output current
IOZ
[1]
All pins are 5 V tolerant.
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Table 38: Static characteristics: I2C-bus interface block
VCC = 3.0 V to 3.6 V; Tamb = 0 °C to 70 °C; unless otherwise specified.
Symbol
Parameter
Input pin SCL and input/output pin
Conditions
Min
Typ
Max
Unit
SDA[1]
VIL
LOW-level input voltage
-
-
0.9
V
VIH
HIGH-level input voltage
2.1
-
-
V
Vhys
hysteresis voltage
0.15
-
-
V
VOL
LOW-level output voltage
-
-
0.4
V
-
0
250
ns
output fall time VIH to VIL
tf
[1]
[2]
10 < Cb = 10 pF to 400 pF
[2]
All pins are 5 V tolerant.
The bus capacitance (Cb) is specified in pF. To meet the specification for VOL and the maximum rise time (300 ns), use an external
pull-up resistor with Rmax = 850/Cb kΩ and Rmin = (VCC − 0.4)/3 kΩ.
Table 39: Static characteristics: USB interface block (DP0 to DP4 and DM0 to DM4)
VCC = 3.0 V to 3.6 V; Tamb = 0 °C to 70 °C; unless otherwise specified.
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
squelch detected
-
-
100
mV
Input levels for high-speed
VHSSQ
squelch detection threshold
(differential signal amplitude)
VHSCM
data signaling common-mode
voltage range
no squelch detected
150
-
-
mV
−50
-
+500
mV
Output levels for high-speed
VHSOI
idle state
−10
-
+10
mV
VHSOH
data signaling HIGH
360
-
440
mV
VHSOL
data signaling LOW
VCHIRPJ
VCHIRPK
−10
-
+10
mV
chirp J level (differential voltage)
[1]
700
-
1100
mV
chirp K level (differential voltage)
[1]
−900
-
−500
mV
Input levels for full-speed and low-speed
VIL
LOW-level input voltage
-
-
0.8
V
VIH
HIGH-level input voltage (drive)
2.0
-
-
V
VIHZ
HIGH-level input voltage (floating)
2.7
-
3.6
V
VDI
differential input sensitivity
0.2
-
-
V
VCM
differential common-mode range
0.8
-
2.5
V
|DP − DM|
Output levels for full-speed and low-speed
VOL
LOW-level output voltage
0
-
0.3
V
VOH
HIGH-level output voltage
2.8
-
3.6
V
1.3
-
2.0
V
−1
-
+1
µA
-
-
20
pF
VCRS
[2]
output signal crossover point
voltage
Leakage current
ILZ
OFF-state leakage current
Capacitance
CIN
transceiver capacitance
pin to GND
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Hi-Speed USB hub controller
Table 39: Static characteristics: USB interface block (DP0 to DP4 and DM0 to DM4)…continued
VCC = 3.0 V to 3.6 V; Tamb = 0 °C to 70 °C; unless otherwise specified.
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
10
-
-
MΩ
3.0
-
3.6
V
Resistance
ZINP
input impedance
Termination
VTERM
[1]
[2]
[3]
[3]
termination voltage for pull-up
resistor on pin RPU
For minimum value, the HS termination resistor is disabled and the pull-up resistor is connected. Only during reset, when both the hub
and the device are capable of high-speed operation.
Characterized only, not tested. Limits guaranteed by design.
In the suspend mode, the minimum voltage is 2.7 V.
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16. Dynamic characteristics
Table 40:
Dynamic characteristics: system clock timing
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
Reset
tW(POR)
internal power-on reset pulse
width
0.2
-
1
µs
tW(RESET_N)
pulse width on pin RESET_N
0.2
-
-
µs
-
12
-
MHz
-
50
-
%
Min
Typ
Max
Unit
-
-
15
ms
Min
Typ
Max
Unit
4
-
15
ns
Crystal oscillator
clock frequency
fclk
[1][2]
crystal
External clock input
δ
[1]
[2]
clock duty cycle
Recommended accuracy of the clock frequency is 500 ppm for the crystal.
Suggested values for external capacitors when using a crystal are 22 to 27 pF.
Table 41: Dynamic characteristics: overcurrent sense timing
VCC = 3.0 V to 3.6 V; Tamb = 0 °C to 70 °C; unless otherwise specified.
Symbol
Parameter
Conditions
Overcurrent sense pins OC1_N to OC4_N
overcurrent trip response time from
OCn_N LOW to PSWn_N HIGH
ttrip
see Figure 9
VCC
∆Vtrip
overcurrent
input
0V
ttrip
VCC
power switch
output
mbl032
0V
Overcurrent input: pins OCn_N; power switch output: pins PSWn_N.
Fig 9. Overcurrent trip response timing.
Table 42: Dynamic characteristics: digital pins[1]
VCC = 3.0 V to 3.6 V; Tamb = 0 °C to 70 °C; unless otherwise specified.
Symbol
Parameter
tt(HL),
tt(LH)
output transition time
[1]
Conditions
All pins are 5 V tolerant.
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Hi-Speed USB hub controller
Table 43: Dynamic characteristics: high-speed source electrical characteristics
VCC = 3.0 V to 3.6 V; Tamb = 0 °C to 70 °C; test circuit Figure 21; unless otherwise specified.
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
Driver characteristics
tHSR
rise time
10 % to 90 %
500
-
-
ps
tHSF
fall time
90 % to 10 %
500
-
-
ps
479.76
-
480.24
Mbit/s
Clock timing
tHSDRAT
data rate
tHSFRAM
microframe interval
124.9375 -
125.0625
µs
tHSRFI
consecutive microframe interval
difference
1
four high-speed
bit times
ns
-
Table 44: Dynamic characteristics: full-speed source electrical characteristics
VCC = 3.0 V to 3.6 V; Tamb = 0 °C to 70 °C; test circuit Figure 22; unless otherwise specified.
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
Driver characteristics
tFR
rise time
CL = 50 pF; 10 % to 90 % of
|VOH − VOL|
4
-
20
ns
tFF
fall time
CL = 50 pF; 90 % to 10 % of
|VOH − VOL|
4
-
20
ns
tFRFM
differential rise and fall time
matching
90
-
111.1
%
ZDRV
driver output resistance
28
-
44
Ω
VCRS
output signal crossover voltage
1.3
-
2.0
V
Data source
[1]
for the driver that is not
high-speed capable
[1][2]
timing[2]
tDJ1
source differential jitter for
consecutive transitions
see Figure 10
[1]
−3.5
-
+3.5
ns
tDJ2
source differential jitter for paired
transitions
see Figure 10
[1]
−4
-
+4
ns
tFEOPT
source SE0 interval of EOP
see Figure 11
160
-
175
ns
tFDEOP
source differential data-to-EOP
transition skew
see Figure 11
−2
-
+5
ns
Receiver timing[2]
tJR1
receiver data jitter tolerance for
consecutive transitions
see Figure 12
−18.5
-
+18.5
ns
tJR2
receiver data jitter tolerance for
paired transitions
see Figure 12
−9
-
+9
ns
tFEOPR
receiver SE0 width
accepted as EOP; see
Figure 11
82
-
-
ns
tFST
width of SE0 interval during
differential transaction
rejected as EOP; see Figure 13
-
-
14
ns
-
-
44
ns
Hub timing (downstream ports configured as full-speed)[2]
tFHDD
hub differential data delay (without
cable)
see Figure 14; CL = 0 pF
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Product data
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Hi-Speed USB hub controller
Table 44: Dynamic characteristics: full-speed source electrical characteristics…continued
VCC = 3.0 V to 3.6 V; Tamb = 0 °C to 70 °C; test circuit Figure 22; unless otherwise specified.
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
tFSOP
data bit width distortion after SOP
see Figure 14
−5
-
+5
ns
tFEOPD
hub EOP delay relative to tHDD
see Figure 15
0
-
15
ns
tFHESK
hub EOP output width skew
see Figure 15
−15
-
+15
ns
Min
Typ
Max
Unit
75
-
300
ns
[1]
[2]
Excluding the first transition from Idle state.
Characterized only, not tested. Limits guaranteed by design.
Table 45: Dynamic characteristics: low-speed source electrical characteristics
VCC = 3.0 V to 3.6 V; Tamb = 0 °C to 70 °C; test circuit Figure 22; unless otherwise specified.
Symbol
Parameter
Conditions
Driver characteristics
tLR
rise time
tLF
fall time
tLRFM
differential rise and fall time
matching
VCRS
output signal crossover voltage
[1]
[1][2]
75
-
300
ns
80
-
125
%
1.3
-
2.0
V
Hub timing (downstream ports configured as full-speed)
tLHDD
hub differential data delay
see Figure 14
-
-
300
ns
tLSOP
data bit width distortion after SOP
see Figure 14
[2]
−60
-
+60
ns
tLEOPD
hub EOP delay relative to tHDD
see Figure 15
[2]
0
-
200
ns
see Figure 15
[2]
−300
-
+300
ns
tLHESK
[1]
[2]
hub EOP output width skew
Excluding the first transition from Idle state.
Characterized only, not tested. Limits guaranteed by design.
TPERIOD
+3.3 V
crossover point
crossover point
crossover point
differential
data lines
0V
mgr870
consecutive
transitions
N × TPERIOD + t DJ1
paired
transitions
N × TPERIOD + t DJ2
TPERIOD is the bit duration corresponding with the USB data rate.
Fig 10. Source differential data jitter.
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Hi-Speed USB hub controller
TPERIOD
+3.3 V
crossover point
extended
crossover point
differential
data lines
0V
differential data to
SE0/EOP skew
N × TPERIOD + t DEOP
source EOP width: t EOPT
receiver EOP width: t EOPR
mgr776
TPERIOD is the bit duration corresponding with the USB data rate.
Full-speed timing symbols have a subscript prefix ‘F’, low-speed timing a prefix ‘L’.
Fig 11. Source differential data-to-EOP transition skew and EOP width.
TPERIOD
+3.3 V
differential
data lines
0V
t JR
t JR1
t JR2
mgr871
consecutive
transitions
N × TPERIOD + t JR1
paired
transitions
N × TPERIOD + t JR2
TPERIOD is the bit duration corresponding with the USB data rate.
tJR is the jitter reference point.
Fig 12. Receiver differential data jitter.
t FST
+3.3 V
VIH(min)
differential
data lines
0V
mgr872
Fig 13. Receiver SE0 width tolerance.
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Hi-Speed USB hub controller
+3.3 V
upstream
differential
data lines
crossover
point
crossover
point
downstream
differential
data
0V
hub delay
downstream
t HDD
hub delay
upstream
t HDD
+3.3 V
crossover
point
downstream
differential
data lines
crossover
point
upstream
differential
data
0V
mgr777
(A) downstream hub delay
(B) upstream hub delay
SOP distortion:
t SOP = t HDD (next J) − t HDD(SOP)
Full-speed timing symbols have a subscript prefix ‘F’, low-speed timing a prefix ‘L’.
Fig 14. Hub differential data delay and SOP distortion.
+3.3 V
crossover
point
extended
upstream
differential
data lines
crossover
point
extended
downstream
port
0V
t EOP−
t EOP+
t EOP−
t EOP+
+3.3 V
crossover
point
extended
downstream
differential
data lines
crossover
point
extended
upstream
end of cable
0V
mgr778
(A) downstream EOP delay
(B) upstream EOP delay
EOP delay:
t EOP = max (t EOP−, tEOP+)
EOP delay relative to t HDD:
t EOPD = t EOP − t HDD
EOP skew:
t HESK = t EOP+ − t EOP−
Full-speed timing symbols have a subscript prefix ‘F’, low-speed timing a prefix ‘L’.
Fig 15. Hub EOP delay and EOP skew.
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Product data
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Hi-Speed USB hub controller
Table 46: Dynamic characteristics: I2C-bus (pins SDA and SCL)
VCC and Tamb within recommended operating range; VDD = +5 V; VSS = VGND ; VIL and VIH between VSS and VDD.
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
0
93.75
100
kHz
4.7
-
-
µs
4.0
-
-
µs
Clock frequency
SCL clock frequency
fSCL
[1]
fXTAL = 12 MHz
General timing
tLOW
SCL LOW time
tHIGH
SCL HIGH time
[2]
tr
SCL and SDA rise time
-
-
1000
ns
tf
SCL and SDA fall time
-
-
300
ns
Cb
capacitive load for each bus line
-
-
400
pF
SDA timing
tBUF
bus free time
4.7
-
-
µs
tSU;STA
set-up time for (repeated) START
condition
4.7
-
-
µs
tHD;STA
hold time (repeated) START condition
4.0
-
-
µs
tSU;DAT
data set-up time
250
-
-
ns
tHD;DAT
data hold time
0
-
-
µs
tSU;STO
set-up time for STOP condition
4.0
-
-
µs
Additional
I2C-bus
tVD;DAT
SCL LOW to data-out valid time
-
-
0.4
µs
[1]
[2]
timing
fSCL = 1⁄64 × fXTAL.
Rise time is determined by Cb and pull-up resistor value Rp (typical 4.7 kΩ).
SDA
t BUF
tr
tf
SCL
P
S
t HD;STA
t SU;DAT
t HD;DAT
t HIGH
t LOW
Sr
P
t SU;STA
t SU;STO
004aaa485
Fig 16. I2C-bus timing.
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Hi-Speed USB hub controller
17. Application information
17.1 Descriptor configuration selection
upstream
facing port GoodLink
I2C-bus
ROM
ISP1520
external microcontroller
acting as I2C-bus master
green and
amber LEDs,
port 1
green and
amber LEDs,
port 2
green and
green and
amber LEDs, amber LEDs,
port 4(1)
port 3
EEPROM
USB function
004aaa303
4 USB downstream facing ports
The I2C-bus cannot be shared between the EEPROM and the external microcontroller; see Table 11.
(1) The function on port 4, which is a non-removable port, is optional.
Fig 17. Descriptors configuration selection application diagram.
17.2 Overcurrent detection limit adjustment
For an overcurrent limit of 500 mA per port, a PMOS with RDSON of approximately
100 mΩ is required. If a PMOS with a lower RDSON is used, analog overcurrent
detection can be adjusted by using a series resistor; see Figure 18.
∆VPMOS = ∆Vtrip = ∆Vtrip(intrinsic) − (IOC(nom) × Rtd), where:
∆VPMOS = voltage drop on PMOS
IOC(nom) = 0.6 µA.
5V
IOC
Rtd(1)
VREF(5V0)
PSWn_N
OCn_N
ISP1520
004aaa259
(1) Rtd is optional.
Fig 18. Adjusting analog overcurrent detection limit (optional).
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Hi-Speed USB hub controller
17.3 Self-powered hub configurations
+
5V±3%
POWER SUPPLY −
+4.85 V (min)
3.3 V LDO
VOLTAGE
REGULATOR
downstream
port connector
T1
VCC
VREF(5V0)
PSW1_N
GND
ferrite bead
120 µF
0.1 µF
47 kΩ
V
+4.75 V BUS
(min) D+
D−
1
GND
SHIELD
OC1_N
PSW2_N
HP
port 2
to
port 3
OC2_N
ISP1520
PSW3_N
OC3_N
SP/BP_N
T4
PSW4_N
3.3 V
ADOC
0.1 µF
47 kΩ
ferrite bead
120 µF
V
+4.75 V BUS
(min) D+
D−
4
GND
SHIELD
OC4_N
004aaa305
Fig 19. Self-powered hub; individual port power switching; individual overcurrent
detection.
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Product data
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ISP1520
Philips Semiconductors
Hi-Speed USB hub controller
5.1 V ± 3 %
+
POWER SUPPLY
−
(kick-up)
+4.95 V (min)
low-ohmic
sense resistor
for overcurrent
detection
3.3 V LDO
VOLTAGE
REGULATOR
downstream
port connector
VCC
T1
OC1_N
VREF(5V0)
GND
PSW1_N
0.1 µF
47 kΩ
ferrite bead
120 µF
V
+4.75 V BUS
(min) D+
D−
1
GND
SHIELD
PSW2_N
PSW3_N
HP
PSW4_N
port 2
to
port 3
ISP1520
SP/BP_N
OC2_N
OC3_N
OC4_N
3.3 V
ferrite bead
+5V
120 µF
V
+4.75 V BUS
(min) D+
D−
ADOC
4
GND
SHIELD
004aaa307
Fig 20. Self-powered hub; ganged port power switching; global overcurrent
detection.
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Product data
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ISP1520
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Hi-Speed USB hub controller
18. Test information
VCC
DPn
15.8 Ω
DMn
15.8 Ω
50 Ω coax D+
(1)
DUT
50 Ω coax D−
GND
mdb273
143 Ω
143 Ω
(1) Transmitter: connected to 50 Ω inputs of a high-speed differential oscilloscope.
Receiver: connected to 50 Ω outputs of a high-speed differential data generator.
Fig 21. High-speed transmitter and receiver test circuit.
3.3 V
1.5 kΩ ± 5%
RPU
fullspeed
(1)
DPn
test point
DUT
CL(1)
15 kΩ
DMn
test point
CL(1)
15 kΩ
mdb274
(1) CL = 50 pF for full-speed.
Fig 22. Full-speed test circuit.
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9397 750 11689
Product data
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ISP1520
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Hi-Speed USB hub controller
19. Package outline
LQFP64: plastic low profile quad flat package; 64 leads; body 10 x 10 x 1.4 mm
SOT314-2
c
y
X
A
48
33
49
32
ZE
e
E HE
A
A2
(A 3)
A1
wM
θ
bp
pin 1 index
64
Lp
L
17
detail X
16
1
ZD
e
v M A
wM
bp
D
B
HD
v M B
0
2.5
5 mm
scale
DIMENSIONS (mm are the original dimensions)
UNIT
A
max.
A1
A2
A3
bp
c
D (1)
E (1)
e
mm
1.6
0.20
0.05
1.45
1.35
0.25
0.27
0.17
0.18
0.12
10.1
9.9
10.1
9.9
0.5
HD
HE
12.15 12.15
11.85 11.85
L
Lp
v
w
y
1
0.75
0.45
0.2
0.12
0.1
Z D (1) Z E (1)
1.45
1.05
1.45
1.05
θ
7o
o
0
Note
1. Plastic or metal protrusions of 0.25 mm maximum per side are not included.
REFERENCES
OUTLINE
VERSION
IEC
JEDEC
SOT314-2
136E10
MS-026
JEITA
EUROPEAN
PROJECTION
ISSUE DATE
00-01-19
03-02-25
Fig 23. LQFP64 package outline.
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9397 750 11689
Product data
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ISP1520
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Hi-Speed USB hub controller
20. Soldering
20.1 Introduction to soldering surface mount packages
This text gives a very brief insight to a complex technology. A more in-depth account
of soldering ICs can be found in our Data Handbook IC26; Integrated Circuit
Packages (document order number 9398 652 90011).
There is no soldering method that is ideal for all surface mount IC packages. Wave
soldering can still be used for certain surface mount ICs, but it is not suitable for fine
pitch SMDs. In these situations reflow soldering is recommended. In these situations
reflow soldering is recommended.
20.2 Reflow soldering
Reflow soldering requires solder paste (a suspension of fine solder particles, flux and
binding agent) to be applied to the printed-circuit board by screen printing, stencilling
or pressure-syringe dispensing before package placement. Driven by legislation and
environmental forces the worldwide use of lead-free solder pastes is increasing.
Several methods exist for reflowing; for example, convection or convection/infrared
heating in a conveyor type oven. Throughput times (preheating, soldering and
cooling) vary between 100 and 200 seconds depending on heating method.
Typical reflow peak temperatures range from 215 to 270 °C depending on solder
paste material. The top-surface temperature of the packages should preferably be
kept:
• below 225 °C (SnPb process) or below 245 °C (Pb-free process)
– for all BGA, HTSSON..T and SSOP..T packages
– for packages with a thickness ≥ 2.5 mm
– for packages with a thickness < 2.5 mm and a volume ≥ 350 mm3 so called
thick/large packages.
• below 240 °C (SnPb process) or below 260 °C (Pb-free process) for packages with
a thickness < 2.5 mm and a volume < 350 mm3 so called small/thin packages.
Moisture sensitivity precautions, as indicated on packing, must be respected at all
times.
20.3 Wave soldering
Conventional single wave soldering is not recommended for surface mount devices
(SMDs) or printed-circuit boards with a high component density, as solder bridging
and non-wetting can present major problems.
To overcome these problems the double-wave soldering method was specifically
developed.
If wave soldering is used the following conditions must be observed for optimal
results:
• Use a double-wave soldering method comprising a turbulent wave with high
upward pressure followed by a smooth laminar wave.
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Hi-Speed USB hub controller
• For packages with leads on two sides and a pitch (e):
– larger than or equal to 1.27 mm, the footprint longitudinal axis is preferred to be
parallel to the transport direction of the printed-circuit board;
– smaller than 1.27 mm, the footprint longitudinal axis must be parallel to the
transport direction of the printed-circuit board.
The footprint must incorporate solder thieves at the downstream end.
• For packages with leads on four sides, the footprint must be placed at a 45° angle
to the transport direction of the printed-circuit board. The footprint must
incorporate solder thieves downstream and at the side corners.
During placement and before soldering, the package must be fixed with a droplet of
adhesive. The adhesive can be applied by screen printing, pin transfer or syringe
dispensing. The package can be soldered after the adhesive is cured.
Typical dwell time of the leads in the wave ranges from 3 to 4 seconds at 250 °C or
265 °C, depending on solder material applied, SnPb or Pb-free respectively.
A mildly-activated flux will eliminate the need for removal of corrosive residues in
most applications.
20.4 Manual soldering
Fix the component by first soldering two diagonally-opposite end leads. Use a low
voltage (24 V or less) soldering iron applied to the flat part of the lead. Contact time
must be limited to 10 seconds at up to 300 °C.
When using a dedicated tool, all other leads can be soldered in one operation within
2 to 5 seconds between 270 and 320 °C.
20.5 Package related soldering information
Table 47:
Suitability of surface mount IC packages for wave and reflow soldering
methods
Package[1]
Soldering method
BGA, HTSSON..T[3], LBGA, LFBGA, SQFP,
SSOP..T[3], TFBGA, USON, VFBGA
Reflow[2]
not suitable
suitable
DHVQFN, HBCC, HBGA, HLQFP, HSO, HSOP, not suitable[4]
HSQFP, HSSON, HTQFP, HTSSOP, HVQFN,
HVSON, SMS
suitable
PLCC[5], SO, SOJ
suitable
suitable
recommended[5][6]
suitable
LQFP, QFP, TQFP
not
SSOP, TSSOP, VSO, VSSOP
not recommended[7]
suitable
CWQCCN..L[8],
not suitable
not suitable
[1]
[2]
PMFP[9],
WQCCN..L[8]
For more detailed information on the BGA packages refer to the (LF)BGA Application Note
(AN01026); order a copy from your Philips Semiconductors sales office.
All surface mount (SMD) packages are moisture sensitive. Depending upon the moisture content, the
maximum temperature (with respect to time) and body size of the package, there is a risk that internal
or external package cracks may occur due to vaporization of the moisture in them (the so called
popcorn effect). For details, refer to the Drypack information in the Data Handbook IC26; Integrated
Circuit Packages; Section: Packing Methods.
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9397 750 11689
Product data
Wave
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ISP1520
Philips Semiconductors
Hi-Speed USB hub controller
[3]
These transparent plastic packages are extremely sensitive to reflow soldering conditions and must
on no account be processed through more than one soldering cycle or subjected to infrared reflow
soldering with peak temperature exceeding 217 °C ± 10 °C measured in the atmosphere of the reflow
oven. The package body peak temperature must be kept as low as possible.
These packages are not suitable for wave soldering. On versions with the heatsink on the bottom
side, the solder cannot penetrate between the printed-circuit board and the heatsink. On versions with
the heatsink on the top side, the solder might be deposited on the heatsink surface.
If wave soldering is considered, then the package must be placed at a 45° angle to the solder wave
direction. The package footprint must incorporate solder thieves downstream and at the side corners.
Wave soldering is suitable for LQFP, QFP and TQFP packages with a pitch (e) larger than 0.8 mm; it
is definitely not suitable for packages with a pitch (e) equal to or smaller than 0.65 mm.
Wave soldering is suitable for SSOP, TSSOP, VSO and VSOP packages with a pitch (e) equal to or
larger than 0.65 mm; it is definitely not suitable for packages with a pitch (e) equal to or smaller than
0.5 mm.
Image sensor packages in principle should not be soldered. They are mounted in sockets or delivered
pre-mounted on flex foil. However, the image sensor package can be mounted by the client on a flex
foil by using a hot bar soldering process. The appropriate soldering profile can be provided on
request.
Hot bar soldering or manual soldering is suitable for PMFP packages.
[4]
[5]
[6]
[7]
[8]
[9]
21. Revision history
Table 48:
Revision history
Rev Date
02
20040504
CPCN
-
Description
Product data (9397 750 11689)
Modifications:
•
•
•
•
•
•
•
•
•
•
•
01
20030625
-
Removed information on bus-power and hybrid-power
Changed active LOW pin symbol representation from overscore (for example, NAME) to
underscore N (NAME_N)
Globally changed VCC(5V0) to VREF(5V0)
Table 2: updated
Updated Section 9.1.3
Updated Table 7
Table 34 and Table 35: changed the value of VREF(5V0)
Globally changed the value of Tamb
Table 36: removed ICC(5V0)
Updated Figure 16
Updated Figure 19 and Figure 20.
Preliminary data (9397 750 10689)
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ISP1520
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Hi-Speed USB hub controller
22. Data sheet status
Level
Data sheet status[1]
Product status[2][3]
Definition
I
Objective data
Development
This data sheet contains data from the objective specification for product development. Philips
Semiconductors reserves the right to change the specification in any manner without notice.
II
Preliminary data
Qualification
This data sheet contains data from the preliminary specification. Supplementary data will be published
at a later date. Philips Semiconductors reserves the right to change the specification without notice, in
order to improve the design and supply the best possible product.
III
Product data
Production
This data sheet contains data from the product specification. Philips Semiconductors reserves the
right to make changes at any time in order to improve the design, manufacturing and supply. Relevant
changes will be communicated via a Customer Product/Process Change Notification (CPCN).
[1]
Please consult the most recently issued data sheet before initiating or completing a design.
[2]
The product status of the device(s) described in this data sheet may have changed since this data sheet was published. The latest information is available on the Internet at
URL http://www.semiconductors.philips.com.
[3]
For data sheets describing multiple type numbers, the highest-level product status determines the data sheet status.
23. Definitions
Short-form specification — The data in a short-form specification is
extracted from a full data sheet with the same type number and title. For
detailed information see the relevant data sheet or data handbook.
Limiting values definition — Limiting values given are in accordance with
the Absolute Maximum Rating System (IEC 60134). Stress above one or
more of the limiting values may cause permanent damage to the device.
These are stress ratings only and operation of the device at these or at any
other conditions above those given in the Characteristics sections of the
specification is not implied. Exposure to limiting values for extended periods
may affect device reliability.
Application information — Applications that are described herein for any
of these products are for illustrative purposes only. Philips Semiconductors
make no representation or warranty that such applications will be suitable for
the specified use without further testing or modification.
performance. When the product is in full production (status ‘Production’),
relevant changes will be communicated via a Customer Product/Process
Change Notification (CPCN). Philips Semiconductors assumes no
responsibility or liability for the use of any of these products, conveys no
licence or title under any patent, copyright, or mask work right to these
products, and makes no representations or warranties that these products are
free from patent, copyright, or mask work right infringement, unless otherwise
specified.
25. Licenses
Purchase of Philips I2C components
Purchase of Philips I2C components conveys a license
under the Philips’ I2C patent to use the components in the
I2C system provided the system conforms to the I2C
specification defined by Philips. This specification can be
ordered using the code 9398 393 40011.
24. Disclaimers
Life support — These products are not designed for use in life support
appliances, devices, or systems where malfunction of these products can
reasonably be expected to result in personal injury. Philips Semiconductors
customers using or selling these products for use in such applications do so
at their own risk and agree to fully indemnify Philips Semiconductors for any
damages resulting from such application.
Right to make changes — Philips Semiconductors reserves the right to
make changes in the products - including circuits, standard cells, and/or
software - described or contained herein in order to improve design and/or
26. Trademarks
ACPI — is an open industry specification for PC power management,
co-developed by Intel Corp., Microsoft Corp. and Toshiba.
GoodLink — is a trademark of Koninklijke Philips Electronics N.V.
I2C-bus — is a trademark of Koninklijke Philips Electronics N.V.
OnNow — is a trademark of Microsoft Corporation.
Intel — is a registered trademark of Intel Corporation.
Contact information
For additional information, please visit http://www.semiconductors.philips.com.
For sales office addresses, send e-mail to: [email protected]
Product data
Fax: +31 40 27 24825
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
9397 750 11689
Rev. 02 — 04 May 2004
50 of 51
ISP1520
Philips Semiconductors
Hi-Speed USB hub controller
Contents
1
2
3
4
5
6
7
7.1
7.2
8
8.1
8.2
8.2.1
8.2.2
8.2.3
8.2.4
8.2.5
8.2.6
8.2.7
8.3
8.4
8.5
8.6
8.7
9
9.1
9.1.1
9.1.2
9.1.3
9.1.4
9.1.5
9.2
General description . . . . . . . . . . . . . . . . . . . . . . 1
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Ordering information . . . . . . . . . . . . . . . . . . . . . 3
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Pinning information . . . . . . . . . . . . . . . . . . . . . . 5
Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 5
Functional description . . . . . . . . . . . . . . . . . . . 9
Analog transceivers . . . . . . . . . . . . . . . . . . . . . 9
Hub controller core . . . . . . . . . . . . . . . . . . . . . . 9
Philips serial interface engine . . . . . . . . . . . . . . 9
Routing logic . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Transaction translator . . . . . . . . . . . . . . . . . . . . 9
Mini-host controller . . . . . . . . . . . . . . . . . . . . . . 9
Hub repeater. . . . . . . . . . . . . . . . . . . . . . . . . . 10
Hub and port controllers . . . . . . . . . . . . . . . . . 10
Bit clock recovery . . . . . . . . . . . . . . . . . . . . . . 10
Phase-locked loop clock multiplier . . . . . . . . . 10
I2C-bus controller . . . . . . . . . . . . . . . . . . . . . . 10
Overcurrent detection circuit. . . . . . . . . . . . . . 10
GoodLink . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Power-on reset . . . . . . . . . . . . . . . . . . . . . . . . 11
Configuration selections. . . . . . . . . . . . . . . . . 12
Configuration through I/O pins . . . . . . . . . . . . 12
Number of downstream facing ports. . . . . . . . 12
Power switching . . . . . . . . . . . . . . . . . . . . . . . 13
Overcurrent protection mode . . . . . . . . . . . . . 14
Non-removable port . . . . . . . . . . . . . . . . . . . . 14
Port indicator support . . . . . . . . . . . . . . . . . . . 15
Device descriptors and string descriptors
settings using I2C-bus . . . . . . . . . . . . . . . . . . 15
9.2.1
Background information on I2C-bus . . . . . . . . 15
9.2.2
Architecture of configurable hub descriptors . 16
9.2.3
ROM or EEPROM map. . . . . . . . . . . . . . . . . . 17
9.2.4
ROM or EEPROM detailed map . . . . . . . . . . . 17
10
Hub controller description . . . . . . . . . . . . . . . 22
10.1
Endpoint 0. . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
10.2
Endpoint 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
11
Descriptors . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
12
Hub requests . . . . . . . . . . . . . . . . . . . . . . . . . . 26
12.1
Standard USB requests . . . . . . . . . . . . . . . . . 26
12.2
Hub class requests . . . . . . . . . . . . . . . . . . . . . 27
12.3
Detailed responses to hub requests . . . . . . . . 28
12.3.1
Get configuration . . . . . . . . . . . . . . . . . . . . . . 28
12.3.2
Get device status . . . . . . . . . . . . . . . . . . . . . . 29
12.3.3
Get interface status. . . . . . . . . . . . . . . . . . . . . 29
© Koninklijke Philips Electronics N.V. 2004.
Printed in The Netherlands
All rights are reserved. Reproduction in whole or in part is prohibited without the prior
written consent of the copyright owner.
The information presented in this document does not form part of any quotation or
contract, is believed to be accurate and reliable and may be changed without notice. No
liability will be accepted by the publisher for any consequence of its use. Publication
thereof does not convey nor imply any license under patent- or other industrial or
intellectual property rights.
Date of release: 04 May 2004
Document order number: 9397 750 11689
12.3.4
12.3.5
12.3.6
12.4
13
14
15
16
17
17.1
17.2
17.3
18
19
20
20.1
20.2
20.3
20.4
20.5
21
22
23
24
25
26
Get endpoint status . . . . . . . . . . . . . . . . . . . .
Get hub status . . . . . . . . . . . . . . . . . . . . . . . .
Get port status . . . . . . . . . . . . . . . . . . . . . . . .
Various get descriptors. . . . . . . . . . . . . . . . . .
Limiting values . . . . . . . . . . . . . . . . . . . . . . . .
Recommended operating conditions . . . . . .
Static characteristics . . . . . . . . . . . . . . . . . . .
Dynamic characteristics . . . . . . . . . . . . . . . . .
Application information . . . . . . . . . . . . . . . . .
Descriptor configuration selection . . . . . . . . .
Overcurrent detection limit adjustment. . . . . .
Self-powered hub configurations . . . . . . . . . .
Test information. . . . . . . . . . . . . . . . . . . . . . . .
Package outline . . . . . . . . . . . . . . . . . . . . . . . .
Soldering . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Introduction to soldering surface mount
packages . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Reflow soldering. . . . . . . . . . . . . . . . . . . . . . .
Wave soldering. . . . . . . . . . . . . . . . . . . . . . . .
Manual soldering . . . . . . . . . . . . . . . . . . . . . .
Package related soldering information . . . . . .
Revision history . . . . . . . . . . . . . . . . . . . . . . .
Data sheet status. . . . . . . . . . . . . . . . . . . . . . .
Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . .
Licenses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Trademarks . . . . . . . . . . . . . . . . . . . . . . . . . . .
29
29
30
31
32
32
33
36
42
42
42
43
45
46
47
47
47
47
48
48
49
50
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