AT43312A ATMEL Corporation, AT43312A Datasheet
AT43312A
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AT43312A Summary of contents
Page 1
... Green (Pb/Halide-free/RoHS Compliant) Package Options Available Overview Introduction The AT43312A port USB hub chip supporting one upstream and four down- stream ports. The AT43312A connects to an upstream hub or Host/Root Hub via Port0 and the other ports connect to external downstream USB devices. The hub re-trans- mits the USB differential signal between Port0 and Ports[1:4] in both directions. A USB hub with the AT43312A can operate as a bus-powered or self-powered through chip’ ...
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... Note: This document assumes that the reader is familiar with the Universal Serial Bus and therefore only describes the unique features of the AT43312A chip. For detailed informa- tion about the USB and its operation, the reader should refer to the Universal Serial Bus Specification Version 1 ...
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... Signal 1 PWR2 2 PWR3 3 PWR4 4 VCC5 5 VSS 6 OSC1 7 OSC2 8 LFT 9 TEST 10 OVC4 11 OVC3 12 OVC2 13 OVC1 14 LPSTAT 15 SELF/BUS 16 STAT4 1255G–USB–05/06 Type Pin AT43312A Signal Type STAT3 O STAT2 O STAT1 O DM0 B DP0 B DM1 B DP1 B CEXT O DM2 B DP2 B VSS V DM3 B DP3 B DM4 B DP4 B PWR1 O 3 ...
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... Table 2. 32-lead LQFP Assignment Pin Signal 1 DP3 2 DM4 3 DP4 4 PWR1 5 PWR2 6 PWR3 7 PWR4 8 VCC5 9 VSS 10 OSC1 11 OSC2 12 LFT 13 TEST 14 OVC4 15 OVC3 16 OVC2 AT43312A 4 Pin Type Signal Type OVC1 I LPSTAT I SELF/BUS I STAT4 O STAT3 O STAT2 O STAT1 O DMO B DP0 B DM1 B DP1 B CEXT O DM2 B DP2 ...
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... Overcurrent. This is the input signal used to indicate to the AT43312A that an overcur- rent is detected at the port. If OVCx is asserted, AT43312A will assert the PWRx pin and report the status to the USB Host. Power Switch. This is an output signal used to enable or disable the external voltage regulator supplying power to a port ...
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... Serial Interface Engine AT43312A 6 The Atmel AT43312A is a USB hub controller for use in a standalone hub as well as an add-on hub for an existing non-USB peripheral such a PC display monitor or keyboard. In addition to supporting the standard USB hub functionality, the AT43312A has addi- tional features to enhance the user friendliness of the hub. ...
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... MOSFET. One advantage of using a MOSFET switch is its very low-voltage drop and low-cost. Each one of the AT43312A’s port has its own power control pin which is asserted only when a SetPortFeature[PORT-POWER] request is received from the host. PWRx is de- asserted under the following conditions: 1 ...
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... The diagrams of Figure 2 and Figure 3 show examples of the power supply and man- agement connections for a typical AT43312A port in the self-powered mode and bus powered mode. Figure 2. Self-powered Hub Power Supply ...
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... The default state of STATx is inactive. After a port is enabled AT43312A will assert the port’s STATx. Any condition that causes the port to be disabled inactivates STATx. Note: The I/O Pins of the AT43312A should not be directly connected to voltages less than VSS or more than the voltage at the CEXT pins ...
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... Endpoint1 is not stalled 1 Endpoint1 is stalled Endpoint 0 is the AT43312A’s default endpoint used for enumeration of the Hub and exchange of configuration information and requests between the Host and the AT43312A. Endpoint 0 supports control transfers. The Hub Controller supports the following descriptors: Device Descriptor, Configuration Descriptor, Interface Descriptor, Endpoint Descriptor, and Hub Descriptor ...
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... Hub Controller will continue to report a status change when polled until that particular change has been removed by a ClearPortFeature request from the Host. No status change will be reported by Endpoint 1 until the AT43312A has been enumerated and configured by the Host via Endpoint 0. All the clock signals required to run the AT43311 are derived from an on-chip oscillator. ...
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... VCC and VSS package pins. Package pins are recommended. The AT43312A can also operate directly off a 3.3V power supply. In this case, leave the VCC pin floating and connect the 3.3V power to the CEXT pin. ...
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... CRS C Input Capacitance IN 1255G–USB–05/06 Condition The values shown in this table are valid for T otherwise noted. Condition Condition DPx and DMx RL of 1.5 kΩ 1.5 kΩ to GND AT43312A Min Max 5 0.3 CEXT -0.3V 4.6 max V + 0.3 CEXT -0.3 4.6 max ...
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... Table 9. DPx, DMx Driver Characteristics, Full-speed Operation Symbol Parameter t Rise Time R t Fall Time F t TR/TF Matching RFM z Driver Output Resistance DRV Note: With external 22Ω series resistor. AT43312A 14 Condition MHz 1 MHz Condition 6 MHz, fundamental V = 3.3V, 6 MHz crystal, 100Ω equiv. series resistor CC Condition ...
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... Table 11. DPx, DMx Driver Characteristics, Low-speed Operation Symbol Parameter t Rise Time R t Fall Time F t TR/TF Matching RFM 1255G–USB–05/06 (1) (1) Figure 6. Full-speed Load TxD+ TxD- AT43312A Condition Min Average Bit Rate 11.97 0.9995 No clock adjustment No clock adjustment - -18.5 -9 160 ...
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... For Paired Transition, downst LHDJ2 t To Next Transition, upstr LUKJ1 t For Paired Transition, upstr LUKJ2 t Data Bit Width Distortion after SOP SOP t Hub EOP Delay Relative to THDD LEOPD t Hub EOP Output Width Skew LHESK AT43312A TxD TxD 200pF to 600pF L Condition Condition 1.5KΩ ...
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... CROSSOVER T PERIOD DIFFERENTIAL DATA LINES DIFF. DATA-to- SE0 SKEW N*T +T PERIOD DEOP T PERIOD DIFFERENTIAL DATA LINES T JR CONSECUTIVE TRANSITIONS N*T PERIOD AT43312A +T XJR1 PAIRED TRANSITIONS N*T +T PERIOD XJR2 POINT EXTENDED SOURCE EOP WIDTH: T FEOPT T LEOPT RECEIVER EOP WIDTH: T FEOPR JR1 JR2 ...
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... Figure 11. Hub Differential Delay, Differential Jitter, and SOP Distortion Figure 12. Hub EOP Delay and EOP Skew UPSTREAM END OF CABLE V SS DOWNSTREAM PORT DOWNSTREAM EOP DELAY WITH CABLE AT43312A 18 UPSTREAM END OF 50% POINT OF CABLE INITIAL SWING V SS HUB DELAY DIFFERENTIAL CROSSOVER DOWNSTREAM ...
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... Time to Detect a Long SEO From Upstream URLSEO t Time of repeating SEO Upstream URPSEO 1255G–USB–05/06 Condition Min 2.5 2.5 2.5 2.5 Only for a SetPortFeature 10 (PORT_RESET) request 2.5 2.5 AT43312A Max Unit 2000 µs 12000 µs 2.5 µs 10000 µs 100 µ 100 µs 10,000 µ ...
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... Figure 13. AT43312A Self-powered USB Hub AT43312A 20 330 330 330 330 OVL1# 17 STAT1# 23 PWR1# 4 DP1 27 DM1 26 TEST# 13 LPSTAT VSS 31 VSS 9 SELF/BUS# 19 CEXT 28 1255G–USB–05/06 ...
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... Figure 14. AT43312A Self-powered USB Hub 5 1255G–USB–05/ AT43312A ...
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... Figure 15. AT43312A Bus-powered USB Hub AT43312A 22 330 330 330 330 OVL1# 17 STAT1# 23 PWR1# 4 DP1 27 DM1 26 TEST# 13 LPSTAT VSS 31 VSS 9 SELF/BUS# 19 CEXT 28 1255G–USB–05/06 ...
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... Figure 16. AT43312A Bus-powered USB Hub 5 1255G–USB–05/ AT43312A ...
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... AT43312A-AC AT43312A-SC Green Package Options (Pb/Halid-free/RoHS Compliant) Ordering Code AT43312A-AU AT43312A-SU 32AA 32-lead, Low-profile (1.4 mm) Plastic Quad Flat Package (LQFP) 32R 32-lead, 0.440" Wide, Plastic Gull Wing Small Outline (SOIC) AT43312A 24 Package Operating Range 32AA 32R Package Operating Range 32AA 32R ...
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... Orchard Parkway San Jose, CA 95131 R 1255G–USB–05/06 B PIN 1 IDENTIFIER TITLE 32AA, 32-lead Body Size, 1.4 mm Body Thickness, 0.8 mm Lead Pitch, Low Profile Plastic Quad Flat Package (LQFP) AT43312A A2 A COMMON DIMENSIONS (Unit of Measure = mm) MIN NOM SYMBOL A – – A1 0.05 – ...
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... B PIN 0º ~ 8º Note: 1. Dimensions D and E do not include mold Flash or protrusion. Mold Flash or protrusion shall not exceed 0.25 mm (0.010"). 2325 Orchard Parkway San Jose, CA 95131 R AT43312A TITLE 32R, 32-lead, 0.440" Body Width, Plastic Gull Wing Small Outline (SOIC) COMMON DIMENSIONS ...
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... Revision History 1255G–USB–05/06 Revision Level – Revision Date Description F – May 2006 Added Green package options to Ordering Information AT43312A 27 ...
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... Atmel products are not suitable for, and shall not be used in, automotive applications. Atmel’s products are not intended, authorized, or warranted for use as components in applications intended to support or sustain life. © 2006 Atmel Corporation. All rights reserved. Atmel marks or trademarks of Atmel Corporation or its subsidiaries. Other terms and product names may be trademarks of others. Atmel Operations Memory ...