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CDCL1810ARGZT Datasheet(PDF) 13 Page - Texas Instruments |
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CDCL1810ARGZT Datasheet(HTML) 13 Page - Texas Instruments |
13 / 30 page ![]() CDCL1810A www.ti.com SLLSEL1 – NOVEMBER 2014 9.4 Device Functional Modes The device is designed to operate from an input voltage supply of 1.8 V. In the default power on reset, all device outputs are enabled and the dividers P0 and P1 are set to 1. 9.5 Programming 9.5.1 SDA/SCL Interface This section describes the SDA/SCL interface of the DCDL1810A device. The CDCL1810A operates as a slave device of the industry standard 2-pin SDA/SCL bus. It operates in the fast-mode at a bit-rate of up to 400 kb/s and supports 7-bit addressing compatible with the popular 2-pin serial interface standard. The device address is made up of the fixed internal address, 11010 (A6:A2), and configurable external pins ADD1 (A1) and ADD0 (A0). Four different devices with addresses 1101000, 1101001, 1101010, and 1101011, can be addressed via the same SDA/SCL bus interface. The least significant bit of the address byte designates a write or read operation. R/W bit: 0 = write to CDCL1810 device. 1 = read from CDCL1810 device. 9.5.2 Command Code Definition Table 3. Command Code Definition BIT DESCRIPTION C7 1 = Byte Write / Read or Word Write / Read operation (C6:C0) Byte Offset for Byte Write / Read and Word Write / Read operation. Table 4. SDA/SCL Bus Slave Device Address A6 A5 A4 A3 A2 A1 A0 R/W 1 1 0 1 0 ADD1 ADD0 0/1 Table 5. Command Code for Byte Write / Read Operation HEX CODE C7 C6 C5 C4 C3 C2 C1 C0 byte 0 80h 1 0 0 0 0 0 0 0 byte 1 81h 1 0 0 0 0 0 0 1 byte 2 82h 1 0 0 0 0 0 1 0 byte 3 83h 1 0 0 0 0 0 1 1 byte 4 84h 1 0 0 0 0 1 0 0 byte 5 85h 1 0 0 0 0 1 0 1 byte 6 86h 1 0 0 0 0 1 1 0 Table 6. Command Code for Word Write / Read Operation HEX CODE C7 C6 C5 C4 C3 C2 C1 C0 word 0: byte 0 and byte 1 80h 1 0 0 0 0 0 0 0 word 1: byte 1 and byte 2 81h 1 0 0 0 0 0 0 1 word 2: byte 2 and byte 3 82h 1 0 0 0 0 0 1 0 word 3: byte 3 and byte 4 83h 1 0 0 0 0 0 1 1 word 4: byte 4 and byte 5 84h 1 0 0 0 0 1 0 0 word 5: byte 5 and byte 6 85h 1 0 0 0 0 1 0 1 word 6: byte 6 and byte 7 86h 1 0 0 0 0 1 1 0 Copyright © 2014, Texas Instruments Incorporated Submit Documentation Feedback 13 Product Folder Links: CDCL1810A |
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