How the I2C Bus Works - EEWeb

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I 2 C Serial CMOS RAM/EEPROMs 256 x 8-bit RAM 256 x 8-byte (2 kbit) Also PCF85102C-2 and PCF85103C-2 Address pointer I Sub address decoder 2 256 Byte C-bus interface E2PROM Semiconductors 50 RAM 256 Byte RAM Address pointer POR Sub address decoder EEPROM POR I 2 C-bus interface Sub address decoder 128 x 8-byte (1 kbit) 512 x 8-byte (4 kbit) 1024 x 8-byte (8 kbit) 2048 x 8-byte (16 kbit) FEATURES - Wide voltage range of 2.5 to 5.5V - 1,000,000 read and write cycles - 10 year data retention Supply SDA SCL KEY POINTS - I²C bus is used to read and write information to and from the memory - Wide voltage range minimizes the number of EEPROMs that need to be in inventory
1024 X 8 CMOS Security EEPROM FEATURES • Nonvolatile memory - serial interface • Compatible with a Standard 24C08 Serial EEPROM • Programmable access protection to limit reads or writes • Lock/unlock function • Highly-reliable EEPROM memory • 8 k bits (1 k bytes), organized as 8 blocks of 128 bytes • 16-byte page write, 10 ms write time • 10 years retention, 100 k write cycle endurance • Operating temperature range - 40 to +85 °C • Operating power supply voltage range of 2.5 V to 3.6 V • Packages offered: SO8 and TSSOP8 DESCRIPTION The PCA24S08 functions as a dual access EEPROM with a wired serial port used to access the memory. Access permissions are set from the serial interface side to isolate blocks of memory from improper access. 10101B 2 B 1 . Only 1 device allowed per bus PCA24S08 - 1024 X 8 CMOS EEPROM with access protection Semiconductors 51
Page 1 and 2: Interface Products Business Line Sp
Page 3 and 4: How the I 2 C Bus Works The I 2 C (
Page 5 and 6: Multi-Master Support How the I 2 C
Page 7 and 8: Typical Applications • Cell phone
Page 9 and 10: C++ Complex I 2 C Bus Arrangement H
Page 11 and 12: • Well known bus: I 2 C Bus Benef
Page 13 and 14: I 2 C Manufacturer Benefits • Sim
Page 15 and 16: I 2 C Product Characteristics • P
Page 17 and 18: I 2 C Bus Basics - Bus Operation Ty
Page 19 and 20: I2C by the numbers Standard-Mode Fa
Page 21 and 22: Device Overview Device Overview Sem
Page 23 and 24: Bus Controllers Bus Controllers Sem
Page 25 and 26: Application - Add I 2 C Bus Port µ
Page 27 and 28: Application - Add additional I 2 C
Page 29 and 30: Application - Convert 8 bits of par
Page 31 and 32: I 2 C Temperature Sensors - Industr
Page 33 and 34: APPLICATIONS • System thermal man
Page 35 and 36: Supply SDA SCL Sub address decoder
Page 37 and 38: Totem Pole Output I 2 C I/O Expande
Page 39 and 40: Totem Pole Output I 2 C I/O Expande
Page 41 and 42: 4-bit GPIO with Interrupt and Reset
Page 43 and 44: Sampling 16-bit GPIO with Interrupt
Page 45 and 46: Supply SDA SCL POR I 2 C-bus interf
Page 47 and 48: Frequency Duty Cycle PWM 0 256 PCA9
Page 49: Serial EEPROM Serial EEPROMS Semico
Page 53 and 54: I2C C Bus I2C C INTERFACE / EEPROM
Page 55 and 56: I 2 C Bus Interrupt Out I 2 C Bus I
Page 57 and 58: I 2 C Switches: Voltage Level Shift
Page 59 and 60: I 2 C Multiplexers: Multi-card Appl
Page 61 and 62: PCA9541 - Multi-Point Application M
Page 63 and 64: PCA9541 - Gatekeeper Multiplexer
Page 65 and 66: I 2 C Multiplexers and Switches Sem
Page 67 and 68: I 2 C Bus repeater (PCA9515) and Hu
Page 69 and 70: Level Translation I 2 C Bus Buffer
Page 71 and 72: I 2 C Hot Swap Bus Buffer PCA9510/1
Page 73 and 74: CompactPCI, AdvancedTCA and VME use
Page 75 and 76: Normal I 2 C P82B715 I 2 C Bus Exte
Page 77 and 78: 3.3/5V SCL 3.3/5 SDA Changing I 2 C
Page 79 and 80: Changing I 2 C bus signals for Opto
Page 81 and 82: Segment Drivers Segment Drivers Sem
Page 83 and 84: A/D Converter A/D Converters Semico
Page 85 and 86: Roadmap Roadmap Semiconductors 85
Page 87 and 88: PCA9504A Other LED Driver and Blink
Page 89 and 90: MLP/HVQFN New Heat Sink Very Thin Q
Page 91 and 92: Combined I 2 C and UART Demo Board
Page 93 and 94: PCA9564 Demo Board Layout Semicondu
Page 95 and 96: PCA9551 LED Blinkers Win-I2CNT Inte
Page 97 and 98: I 2 C Device Data Sheets, IBIS mode
Page 99 and 100: I 2 C Sample Kit The I 2 C Sample K
Page 101:
End Philips Semiconductors www.semi
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