P25/29

Rev. M, May 2010

ML5012

Executing WR_AD command to deliver the internal voltage data and store the data into A/D register.

Internal reference voltage data stored in A/D register: A/D[11:0]

Internal reference voltage at AD Output Range = 0 (A/D Data : 0 ~ 4,095)

Comparison reference voltage = A/D[11:0] / 4096 * VR (V)

Note: A/D Register value (unsigned 12 bits) = Convert register value into decimal number

Internal reference voltage at AD Output Range = 1 (A/D Data : -2,047 ~ 2,047)

Register value is a 12 bits signed data which A/D[11] shows the sign of A/D Register value as

follow :

Case 1 : If A/D[11] = 0,

Case 2 : If A/D[11] = 1,

Note: A/D Register value (signed 12 bits) = Convert register value into decimal number.

6-3. Starting comparison

The comparison starts when the bit S/S of A/D configuration register is set. The operation mode should

be set upon starting of the comparison. All A/D configuration register settings are made at the same

time.

Setting to start comparison

Setting of A/D configuration register

Operation

EN, S/S = 1

Start of A/D conversion

MD = 1

Set operation mode to Comparison mode

Settings of bits other than those necessary to start comparison will not affect the comparison

operation. Please do not modify A/D configuration register, AD output range and PGA gain value

while the A/D converter is running.