USB-Module: USB 2.0 Microcontroller Board

To the shop Table of Contents Block diagram Features Firmware Development Kit and Examples Functional description     External power: CON1     EEPROM address: JP2     USB power: JP1     I/O Connector Images Additional resources Schematics (PDF) Eagle Library of the I/O connector Cypress CY7C68013A/14A datasheet from the Cypress homepage EZ-USB Technical Reference Manual from the Cypress homepage

Block diagram

Features

• High-Speed (480 MBit/s) USB interface via Mini-USB connector (B-type)
• Cypress EZ-USB FX2 Microcontroller CY7C68013A/14A
• MicroSD socket for standard and high capacity (SDHC) microSD cards (the cards must support the SPI mode)
• 36 General Purpose I/O's (GPIO), 40 if no microSD Card is inserted
• 28 special I/O's (SIO):
  • 2 serial ports (4 pins)
  • I²C interface (2 pins)
  • 13 GPIF (general purpose interface) signals (control, ready, programmable flags)
  • 3 timers
  • 2 interrupts
  • 1 clock output
  • 1 Wakeup pin
  • 1 Breakpoint pin
  • 1 reset pin
• 128 Kbit EEPROM memory
• On-board high-efficiency 3.3 V / 700 mA (1.3 A peak) switching regulator
  • Supports bus powered operation via USB
  • Supports external powered 4.6 to 20 V operation
  • Both supply inputs are protected by diodes and thus can be driven safely at the same time

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EZ-USB SDK and examples

The SDK package contains a lot of examples which can be used as starting point for own applications.

More Information are available in the EZ-USB SDK section.

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Functional description

The following drawing shows the measurements and the location of the of the described elements.

Click on the image for a larger version or download the PDF version.

External power: CON1

An appropriate power connector set consisting of a male 2 pin header and a female 2 pin connector with cable is delivered together with the USB module.

It is also possible to supply the external voltage via the I/O connector described below.

EEPROM address: JP2

JP2	I2C address
open	0xA2
close	0xAA

The EZ-USB FX2 Microcontroller searches for the firmware at the address 0xA2 which is the default address (jumper open).

The main purpose of this jumper is to disable the EEPROM boot-load. If, for example, the EEPROM was programmed with a corrupt firmware the Microcontroller can be booted with the internal default firmware by short cutting the two pads of jumper JP2 during powering-on the USB-Module.

USB Power: JP1

If this jumper is closed the bus powered supply via USB is enabled. By default this jumper is closed by a small wire. (The wire may be covered by the solder mask.) If bus powered operation is not desired this wire can be cut. (After that JP1 can by closed by solder bridge.)

Usually there is no need to open JP1 since both, the bus powered supply and the external supply are protected by diodes, see the schematics. Only if the required current is large (more than the USB port can deliver) and if the external voltage is less than 5.5 V Jumper JP1 should be opened.

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I/O Connector

Two 2x21 pin connectors deliver the I/O signals and are used for the power supply. The drawing shows the position of the connectors.

There is a polarization key in form of a small hole close to the B1 pin as shown on the drawing. In order to prevent damage equal orientation of the polarization key (hole) of all stacked modules must be ensured.

The following Pinlist and the List of Connections are also available in Gnumeric or Excel format.

Pinlist
	A	B		C	D
1	4.6..20V	USB5V		USB5V	4.6..20V	1
2	GND	GND		GND	GND	2
3	*IFCLK	INT4		RDY5	CLKOUT	3
4	SCL	T0		RDY4	PD7/FD15	4
5	SDA	T1		RDY3	PD6/FD14	5
6	PB0/FD0	T2		RDY2	PD5/FD13	6
7	PB1/FD1	BKPT		RDY1/*SLWR	PD4/FD12	7
8	PB2/FD2	TXD1		RDY0/*SLRD	PD3/FD11	8
9	PB3/FD3	RXD1		PE7/GPIFADR8	PD2/FD10	9
10	PB4/FD4	CTL3		PE6/T2EX	PD1/FD9	10
11	PB5/FD5	CTL4		PE5/INT6	PD0/FD8	11
12	PB6/FD6	CTL0/*FLAGA		PE4/RXD1OUT	PA7/*FLAGD/SLCS#	12
13	PB7/FD7	CTL1/*FLAGB		PE3/RXD0OUT	PA6/*PKTEND	13
14	TXD0	CTL2/*FLAGC		PE2/T2OUT	PA5/FIFOADR1	14
15	RXD0	CTL5		PE1/T1OUT	PA4/FIFOADR0	15
16	PC0/GPIFADR0	PC4/GPIFADR4		PE0/T0OUT	PA3/*WU2	16
17	PC1/GPIFADR1	PC5/GPIFADR5		INT5#	PA2/*SLOE	17
18	PC2/GPIFADR2	PC6/GPIFADR6		*WAKEUP	PA1/INT1#	18
19	PC3/GPIFADR3	PC7/GPIFADR7		RESET#	PA0/INT0#	19
20	GND	GND		GND	GND	20
21	3.3V	3.3V		3.3V	3.3V	21

Summary
A/B		C/D
GPIO	12	GPIO	24
GPIO shared with microSD	4	GPIF	6
Serial	4	CLKOUT	1
GPIF	7	Interrupt	1
Interrupt	1	Wakeup	1
Timer	3	Reset	1
I2C	2	GND	4
Breakpoint	1	3.3V	2
GND	4	4.6..20V	1
3.3V	2	USB5V	1
4.6..20V	1
USB5V	1
GPIO	12	GPIO	24
GPIO shared with microSD	4	SIO (special I/O)	10
SIO (special I/O)	18	Power	8
Power	8	Sum	42
Sum	42

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Images

Click on the images for larger versions.

Top side of the USB Module.

Size comparison of the USB Module.

The USB Module perfectly fits on a triple-pad Prototyping board. The depicted set consists in: 1 × USB Module 1 × Prototyping board 2 × 2x21 pin female pin header 2 × 2x21 pin male pin header