ASM1042 Data Sheet
iv
Table of Contents
Revision History ............................................................................................................................................. iii
Table of Contents ........................................................................................................................................... iv
List of Figures ................................................................................................................................................. v
1. General Description ..................................................................................................................................... 7
2. Features ..................................................................................................................................................... 7
Package Type ........................................................................................................................................... 7
3. Functional Diagram ..................................................................................................................................... 8
4. Pinout Diagrams ......................................................................................................................................... 9
5. Pin Descriptions ........................................................................................................................................ 10
PCI Express Interface ............................................................................................................................. 10
SPI Interface.......................................................................................................................................... 10
USB Interface ........................................................................................................................................ 10
System Interface .................................................................................................................................... 11
Power and Ground ................................................................................................................................. 11
Strapping Table ...................................................................................................................................... 11
6 Register Table ............................................................................................................................................ 12
6.1 Register Attribute ................................................................................................................................. 12
6.2 PCI Configuration Space Register .......................................................................................................... 12
6.2.1 Type 0 Configuration Header Registers............................................................................................ 12
6.2.2 Message Signal Interrupts (MSI & MSI-X) Capability Registers .......................................................... 16
6.2.3 Power Management Capability Registers ......................................................................................... 17
6.3 Host Controller Capability Register ........................................................................................................ 18
6.4 Host Controller Operational Register ..................................................................................................... 20
6.5 Host Controller Runtime Register .......................................................................................................... 24
6.6 Doorbell Registers ................................................................................................................................ 25
7 Electrical Characteristics ............................................................................................................................. 26
7.1 Absolute Maximum Ratings ................................................................................................................... 26
7.2 Recommended Operating Conditions ..................................................................................................... 26
7.3 AC/DC Characteristics ........................................................................................................................... 26
Digital Pin Specification .......................................................................................................................... 26
PCI Express Electrical Specification .......................................................................................................... 26
USB3.0 Electrical Specification ................................................................................................................ 29
USB2.0 Electrical Specification ................................................................................................................ 30
PCI Express Differential Reference Clock Input Ranges ............................................................................. 30
Reference Resistor Requirement .............................................................................................................. 30
Crystal Electrical Specification ................................................................................................................. 31
20MHz Clock Oscillator Electrical Specification .......................................................................................... 31
48MHz Clock Input Electrical Specification ............................................................................................... 31
Power Consumption ............................................................................................................................... 32
8. Timing Diagram ........................................................................................................................................ 33
Power On Sequence Timing Specification for Asynchronous mode ............................................................. 33
Power On Sequence Timing Specification for Synchronous mode .............................................................. 34
SPI Interface Timing Specification ........................................................................................................... 34
9. PCB Design Guide under Thermal Pad ........................................................................................................ 35
10. Package Information ............................................................................................................................... 36
11. Top Marking Information.......................................................................................................................... 37
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