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TUSB2036 Datasheet(PDF) 3 Page - Texas Instruments

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Part No. TUSB2036
Description  2/3-PORT HUB FOR THE UNIVERSAL SERIAL BUS WITH OPTIONAL SERIAL EEPROM INTERFACE
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Maker  TI [Texas Instruments]
Homepage  http://www.ti.com
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 3 page
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TUSB2036
2/3-PORT HUB FOR THE UNIVERSAL SERIAL BUS
WITH OPTIONAL SERIAL EEPROM INTERFACE
SLLS372 – MARCH 2000
3
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
description (continued)
The hub silicon can accurately reflect the system port configuration by the NP3 and NPINT1-0 pins. When NP3
is low, the hub is configured as a 3-port hub; when it is high, the hub is configured as a 2-port hub. The NPINT1-0
pins tell the hub silicon how many ports have permanently attached devices, according to Table 1.
Table 1. System Port Configuration
NPINT1-0
PORT AVAILABILITY
HUB DESCRIPTOR
DEVICE REMOVABLE FIELD (7–0)
00
All ports are available through external USB connectors
00000000
01
Port 1 has a permanently attached device; ports 2 and 3 are externally available
00000010
10
Ports 1 and 2 have permanently attached devices; port 3 is externally available
00000110
11
All ports have permanently attached devices
NP3 high: 00000110
NP3 low: 00001110
NPINT1-0
COMPOUND DEVICE OR NOT
HUB DESCRIPTOR WITH HUB
CHARACTERISTICS FIELD BIT 2
00
Hub is not part of a compound device
0
01, 10, 11
Hub is part of a compound device
1




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