AIF120F300N-L(2006) Просмотр технического описания (PDF) - Astec Semiconductor => Silicon Link

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производитель

AIF120F300N-L
(Rev.:2006)

600W, DC-DC Converter Module

Astec Semiconductor => Silicon Link 

Technical Reference Notes

AIF12W300 DC-DC Series

Basic Operation and Features (continued)

I2C COMMUNICATION PROTOCOL

1. Command word

Command word is sent by master system to inform slave device that what kind of operation the master like to do. It is a 16-bit

data. Bit 0 to bit 9 indicate the data need to transfer (e.g. the value of OV_ADJ). As there are two different lengths of data, one

is 8-bit and the other is 10-bit. So, if 10-bit data is transmitting/receiving, whole 10 bits (DATA9 – DATA0) will be used. In 8

bits case, only the least significant 8 bits (DATA7 – DATA0) will be used. The two bits (DATA9 and DATA8) will be cleared.

The 5 bits (REG4 – REG0) indicate which command needs to. When the master requests data from the slave, the DATA9-

DATA0 bits should be cleared. And during setting the four information items (Model Name, Serial No., Firmware Version,

Model Revision), DATA9-DATA8 should be cleared and is followed by the actual data.

The format of the 16-bits command word is as follow:

Bit 15

Bit 8

DSR

REG4 REG3 REG2 REG1 REG0 DATA9 DATA8

Bit 7

Bit 0

DATA7 DATA6 DATA5 DATA4 DATA3 DATA2 DATA1 DATA0

The DSR (Data Set Read) bit controls read/write of data. If the master send a 0 (write operation) for this bit, the slave device

will get the command register and data. And then set the value of the corresponding command register. If the master sends a 1

(read operation) for this bit, the slave device will get the current value of the corresponding command register and send it to the

master.

The table below shows the register mapping:

Command Register

MODEL_NO (read/write*)

SERIAL_NO (read/write*)

FIRMWARE_VER (read/write*)

MODEL_REV (read/write*)

SLAVE_ADDRESS (read/write)

OVP_ADJ (read/write)

V_ADJ (read/write)

CLIM_ADJ (read/write)

TMON (read only)

VOUT (read only)

CMON (read only)

RESET (write only)

LOCK (write only*)

UNLOCK (write only*)

Coding (REG4 – REG0)

00000

00001

00010

00011

00100

00101

00110

00111

01000

01001

01010

01111

10000

10001

* Remark: write functions only used to production.

MODEL: AIF12W300 SERIES

JUNE 2006

SHEET 20 OF 37

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