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Microchip Technology USB2422-I Controller manual available for free PDF download: General Description Manual
Microchip Technology USB2422-I General Description Manual (53 pages)
2-Port USB 2.0 Hi-Speed Hub Controller
Brand:
Microchip Technology
| Category:
Controller
| Size: 1 MB
Table of Contents
Table of Contents
4
Chapter 1 Block Diagram
8
Figure 1.1 USB2422 Block Diagram
8
Chapter 2 Pin Descriptions
9
Pin Configuration
9
Figure 2.1 USB2422 24-Pin SQFN
9
Pin Table
10
Table 2.1 USB2422 Pin Table
10
Pin Descriptions (Grouped by Function)
11
Table 2.2 USB2422 Pin Descriptions
11
Buffer Type Descriptions
14
Strap Pin Configuration
14
Non-Removable
14
Figure 2.2 Non-Removable Pin Strap Example
14
Table 2.3 Buffer Type Descriptions
14
Table 2.4 Strap Option Summary
14
Internal Pull-Down (IPD)
15
Led
15
Figure 2.3 IPD Pin Strap Example
15
Figure 2.4 LED Pin Strap Example
15
Example Applications
16
Figure 2.5 Example Application - Soc Based Design
16
Figure 2.6 Example Application - Non-Soc Based Design
16
Table 2.5 Example Applications - Resistor/Capacitor Values
17
Chapter 3 Battery Charging Support
18
USB Battery Charging
18
Special Behavior of PRTPWR Pins
18
Figure 3.1 Battery Charging Via External Power Supply
18
Battery Charging Configuration
19
Battery Charging Enabled Via Smbus
19
Chapter 4 Configuration Options
20
Hub Configuration
20
Resets
20
External Hardware RESET_N
20
Table 4.1 Hub Configuration Options
20
USB Bus Reset
21
Figure 4.1 Hub Configuration Timing
21
Table 4.2 Hub Configuration Timing
21
Smbus
22
Smbus Slave Address
22
Protocol Implementation
22
Figure 4.2 Block Write
22
Slave Device Timeout
23
Stretching the SCLK Signal
23
Smbus Timing
23
Bus Reset Sequence
23
Smbus Alert Response Address
23
Figure 4.3 Block Read
23
Smbus Registers
24
Vendor ID Least Significant Bit Register (VIDL)
25
Vendor ID most Significant Bit Register (VIDM)
25
Product ID Least Significant Bit Register (PIDL)
26
Product ID most Significant Bit Register (PIDM)
26
Device ID Least Significant Bit Register (DIDL)
26
Device ID most Significant Bit Register (DIDM)
26
Configuration Data Byte 1 Register (CFG1)
27
Configuration Data Byte 2 Register (CFG2)
29
Configuration Data Byte 3 Register (CFG3)
30
Non-Removable Device Register (NRD)
30
Port Disable for Self-Powered Operation Register (PDS)
31
Port Disable for Bus-Powered Operation Register (PDB)
31
Max Power for Self-Powered Operation Register (MAXPS)
32
Max Power for Bus-Powered Operation Register (MAXPB)
32
Hub Controller Max Current for Self-Powered Operation Register (HCMCS)
32
Hub Controller Max Power for Bus-Powered Operation Register (HCMCB)
33
Power-On Time Register (PWRT)
33
Language ID High Register (LANGIDH)
33
Language ID Low Register (LANGIDL)
33
Manufacturer String Length Register (MFRSL)
34
Product String Length Register (PRDSL)
34
Serial String Length Register (SERSL)
34
Manufacturer String Registers (MANSTR)
34
Product String Registers (PRDSTR)
35
Serial String Registers (SERSTR)
35
Battery Charging Enable Register (BC_EN)
35
Boost Upstream Register (BOOSTUP)
36
Boost Downstream Register (BOOST40)
36
Port Swap Register (PRTSP)
37
Port 1/2 Remap Register (PRTR12)
38
Status/Command Register (STCD)
39
Chapter 5 DC Parameters
40
Maximum Guaranteed Ratings
40
Operating Conditions
40
Figure 5.1 Supply Rise Time Model
41
Table 5.1 DC Electrical Characteristics
41
Pin Capacitance
43
Table 5.2 Pin Capacitance
43
Chapter 6 AC Specifications
44
Oscillator/Crystal
44
Figure 6.1 Typical Crystal Circuit
44
Figure 6.2 Formula to Find the Value of C1 and C2
44
Table 6.1 Crystal Circuit Legend
44
External Clock
45
Usb 2.0
45
Smbus Interface
45
Chapter 7 Package Outline
46
Figure 7.1 24-SQFN Package
46
Figure 7.2 Taping Dimensions and Part Orientation
47
Figure 7.3 Reel Dimensions
48
Figure 7.4 Tape Length and Part Quantity
48
Chapter 8 Datasheet Revision History
49
Table 8.1 Revision History
49
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