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DS10CP154A Datasheet(PDF) 10 Page - Texas Instruments |
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DS10CP154A Datasheet(HTML) 10 Page - Texas Instruments |
10 / 20 page SDA SCL SMBus Interface EN_smb 4 Switch Configuration Register LOS Register Control Register DS10CP154A SNLS306C – AUGUST 2008 – REVISED APRIL 2013 www.ti.com Reading From a Register To read a register, the following protocol is used (see SMBus 2.0 specification): 1) The Host drives a START condition, the 7-bit SMBus address, and a “0” indicating a WRITE. 2) The Device (Slave) drives an ACK bit (“0”). 3) The Host drives the 8-bit Register Address. 4) The Device drives an ACK bit (“0”). 5) The Host drives a START condition. 6) The Host drives the 7-bit SMBus Address, and a “1” indicating a READ. 7) The Device drives an ACK bit “0”. 8) The Device drives the 8-bit data value (register contents). 9) The Host drives a NACK bit “1” indicating end of READ transfer. 10) The Host drives a STOP condition. The READ transaction is completed, the bus goes Idle and communication with other SMBus devices may now occur. REGISTER DESCRIPTIONS There are three data registers in the DS10CP154A accessible via the SMBus interface. Table 6. DS10CP154A SMBus Data Registers Address Name Access Description (hex) 0 Switch Configuration R/W Switch Configuration Register 3 Control R/W Powerdown, LOS Enable and Pin Control Register 4 LOS RO Loss Of Signal (LOS) Reporting Register Switch Configuration Register The Switch Configuration register is utilized to configure the switch. The following two tables show the Switch Configuration Register mapping and associated truth table. Bit Default Bit Name Access Description D[1:0] 00 Input Select 0 R/W Selects which input is routed to the OUT0. D[3:2] 00 Input Select 1 R/W Selects which input is routed to the OUT1. D[5:4] 00 Input Select 2 R/W Selects which input is routed to the OUT2. D[7:6] 00 Input Select 3 R/W Selects which input is routed to the OUT3. 10 Submit Documentation Feedback Copyright © 2008–2013, Texas Instruments Incorporated Product Folder Links: DS10CP154A |
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