Datasheet

3
www.national.com
USBN9603/USBN9604
Table of Contents
1.0 Signal/Pin Connection and Description
1.1 CONNECTION DIAGRAMS ........................................................................................................6
1.2 DETAILED SIGNAL/PIN DESCRIPTIONS ..................................................................................7
1.2.1 Power Supply ................................................................................................................ 7
1.2.2 Oscillator, Clock and Reset ........................................................................................... 7
1.2.3 USB Port .......................................................................................................................8
1.2.4 Microprocessor Interface............................................................................................... 8
2.0
Functional Overview
2.1 TRANSCEIVER .........................................................................................................................10
2.2 VOLTAGE REGULATOR (VREG) .............................................................................................10
2.3 SERIAL INTERFACE ENGINE (SIE) .........................................................................................10
2.4 ENDPOINT PIPE CONTROLLER (EPC) ...................................................................................12
2.5 MICROCONTROLLER INTERFACE .........................................................................................12
3.0 Parallel Interface
3.1 NON-MULTIPLEXED MODE .....................................................................................................13
3.1.1 Standard Access Mode ...............................................................................................14
3.1.2 Burst Mode ..................................................................................................................14
3.1.3 User Registers .............................................................................................................14
3.2 MULTIPLEXED MODE ..............................................................................................................15
4.0 Direct Memory Access (DMA) Support
4.1 STANDARD DMA MODE (DMA) ...............................................................................................16
4.2 AUTOMATIC DMA MODE (ADMA) ...........................................................................................17
5.0 MICROWIRE/PLUS Interface
5.1 OPERATING COMMANDS .......................................................................................................19
5.2 READ AND WRITE TIMING ......................................................................................................20
6.0 Functional Description
6.1 FUNCTIONAL STATES .............................................................................................................22
6.1.1 Line Condition Detection .............................................................................................22
6.1.2 Functional State Transition ..........................................................................................22
6.2 ENDPOINT OPERATION ..........................................................................................................24
6.2.1 Address Detection .......................................................................................................24
6.2.2 Transmit and Receive Endpoint FIFOs ....................................................................... 24
6.2.3 Programming Model ....................................................................................................28
6.3 POWER SAVING MODES ........................................................................................................28
6.4 CLOCK GENERATION ..............................................................................................................29
7.0 Register Set
7.1 CONTROL REGISTERS ...........................................................................................................30
7.1.1 Main Control Register (MCNTRL) ............................................................................... 30
Obsolete