Cypress Semiconductor CY8C24894 Uživatelský manuál Strana 30
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Hodnocené. / 5. Na základě hodnocení zákazníků
30 CY3240 USB-I2C Bridge Guide, Doc. # 001-66660 Rev.*B
Hardware
Figure 4-7. GPIO Pin Schematic
4.2.5 I2C Slave Interface Connector
The I2C slave interface connector is used to communicate data between the target device and the
bridge board. It consists of two devices, MAX3378 and SN721.
MAX3378
■ Is used to convert voltage level between the target device (Vcc) and the host level voltage (V
L
)
■ Has bidirectional level translation, accepts V
L
+1.2 V (Min) to +5.5 V (Max); V
out
(High) is 0.6
times V
L
(if source current is 0.02 mA) and V
out
(Low) is 0.4 V
SN721
■ An array of SCR/diode bipolar structure for ESD and over-voltage protection
- USB-I2C Bridge Guide 1
- Contents 3
- A. Appendix 59 4
- 1. Introduction 5
- 1.3 Document History 6
- Introduction 8
- 2. Getting Started 9
- Getting Started 10
- 2.2 PSoC Designer 13
- 2.3 PSoC Programmer 14
- 2.4 Bridge Control Panel 15
- 3. Kit Operation 17
- 3.2.1 Program USB-I2C Bridge 18
- Kit Operation 19
- 4. Hardware 25
- 4.2 Functional Description 26
- 4.2.1 PSoC CY8C24894 Chip 27
- 4.2.2 USB Mini B Connector 28
- 4.2.3 ISSP Programming Header 28
- 4.2.4 GPIO Pins 29
- Hardware 30
- 4.2.6 Demo Board 31
- 5. Code Examples 33
- Code Examples 34
- Figure 5-4. Default View 37
- PWM8 in the design 45
- GlobalOutEven_2 47
- 5.1.4 Verify Output 51
- 5.2 USBtoIIC Code Example 53
- 5.2.3 USBtoIIC Flowchart 55
- 5.2.4 Verify Output 57
- A. Appendix 59
- Figure A-3. Diode Schematic 60
- A.1.2 Demo Board Schematic 61
- A.2.1 Demo Board Layout 62
- A.3 Bill of Materials (BOM) 63
- A.3.2 Demo Board 64
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