Maxim Integrated MAX3420E - Manual (Page 2)

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. What if a USB IN request comes in while firmware is loading the IN FIFO?
5. How do I know when to load an IN FIFO?
6. What if there is a USB transfer error? Do I need to write code to handle the error condition?
7. How do I program a BULK OUT transfer?
8. How about INTERRUPT transfers?
9. How do I program a SETUP transfer?
10. Do I need to program the USB data toggles?
11. The MAX3420E interrupt request bits are cleared by writing "1" to them. Is this backwards?
12. Do you have any programming tips?
5. Host software questions
1. How does my Windows application talk to the MAX3420E?
2. Does Maxim supply a custom Windows driver?
3. What example code does Maxim supply?
4. I want to design a MAX3420E-based device that does not conform to a standard Windows
class. What do I use for a Windows driver?
5. How does the MAX3420E compare with USB 'serial bridge' chips?
6. What are the advantages and disadvantages of the MAX3420E approach?
6. Miscellaneous questions
1. Can my firmware determine which chip revision I have?
2. What is the current revision level of the MAX3420E?
1. General Questions
1. What is the MAX3420E ?
The MAX3420E is a USB full-speed (12Mbps) peripheral controller with a built-in transceiver
and a USB serial interface engine (SIE) that handles the low-level USB signaling details.
2. Does the MAX3420E include a microprocessor?
No. The MAX3420E is designed to interface easily to any microprocessor, DSP, or ASIC. This
makes it possible to add USB to any system without switching processors or tool sets.
3. What packages are available for the MAX3420E?
The MAX3420E is available in two packages. The 32-pin TQFP (7mm x 7mm body size) is
good for prototyping and short production runs because it has package leads. The 24-pin
TQFN package (5mm x 5mm body size, pads underneath the package) is ideal for high-
volume compact devices.
4. Are the MAX3420E packages lead-free?
Yes.
2. USB Questions
1. What USB speeds does the MAX3420E support?
The MAX3420E supports USB full-speed (12Mbps) operation as a peripheral.
2. Does the MAX3420E comply with the USB spec? Which revision?
The MAX3420E is compliant with the USB 2.0 specification as it applies to full-speed
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