Maxim-integrated MAX3420E User Manual

Maxim > Design Support > Technical Documents > Application Notes > Interface Circuits > APP 3597Keywords: USB, FAQ, MAX3420E, SPI, peri

1. How does my firmware talk to the MAX3420E?2. How do I program the MAX3420E to handle USB enumeration?3. How do I program a BULK IN transfer?4.

operation. 3. How many endpoints does the MAX3420E support?The MAX3420E contains four endpoints:EP0, bidirectional CONTROL endpoint, 64 byte FIFO.EP1

9. What does the CONNECT bit do?The MAX3420E has a switchable internal 1500Ω pullup resistor between its D+ pin and VCC.The CONNECT bit operates this

interrupts?The MAX3420E supports both interrupt types, using a control bit called INTLEVEL. SettingINTLEVEL=1 makes the INT output pin open-drain, act

device address and the armed endpoint sends the FIFO data to the host.4. What if a USB IN request comes in while firmware is loading the IN FIFO?The

11. The MAX3420E interrupt request bits are cleared by writing "1" to them. Is thisbackwards?It may seem backwards at first, but it is the

USB serial bridge chips connect to a PC using its USB port, but appear as a virtual COM portto the application running on the PC . A custom driver, su

For Samples: http://www.maximintegrated.com/samplesOther Questions and Comments: http://www.maximintegrated.com/contact Application Note 3597: http://