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STV9432TAP

100MHz OSD FOR MONITOR INCLUDING BEAM CURRENTS, VIDEO TIMING ANALYZER AND PWMs

STMicroelectronics 

STV9432TAP

V1 Register: V sync to Active video, min. of K to A

400C

V1.7

V1.6

V1.5

V1.4

400D

-

-

-

-

V2 Register: Active video to V sync, min. of B to K’

400E

V2.7

V2.6

V2.5

400F

-

-

-

V3 Register: Number of lines per frame, K to K’

V2.4

-

’

4010

4011

V3.7

-

V3.6

-

V3.5

-

V3.4

-

V1.3

V1.11

V2.3

V2.11

V3.3

V3.11

V1.2

V1.10

V2.2

V2.10

V3.2

V3.10

V1.1

V1.9

V2.1

V2.9

V3.1

V3.9

V1.0

V1.8

V2.0

V2.8

V3.0

V3.8

8.3 - TIMING ANALYSIS TRIGGER

The Timing Analysis is performed according to the setting of SBN and TIMG registers:

8.3.1 - SBN Register

This 8 bits register holds the ”sampling bloc” number.

The sampling bloc is a set of 4 consecutive scan lines, the first of which is used for sampling the video timings or

Beam currents.

The reset value of this register is 0.

4015

SBN7

SBN6

SBN5

SBN4

SBN3

SBN2

SBN1

SBN0

8.3.2 - TIMG Register

4016

STM

NFR1

NFR0 ADCDLY3 ADCDLY2 ADCDLY1 ADCDLY0 SELECT

This 8 bits register holds the following parameters:

STM

: Start Measurement Bit. This bit has to be forced to 1 by I2C to start the measure-

ment sequence, depending on the measurement selection bit. When measure-

ment is completed the IC will reset this bit to 0.

NFR [1:0]

: NFR number of measurement frames, 1 to 4 frames

ADCDLY[3:0]

SELECT

: Cut-off Beam current ADC sampling delay time: 0 to 15 x tOSC, by tOSC steps

: Selection of Beam current measurement (0) or Timing measurement (1)

To initiate a Timing Analysis cycle:

- program the Sampling Bloc Number in the SBN Register,

- program the TIMG Register, with: ”SELECT” bit =1, ”NFR” bits specify the number of measurement frames

(H1, H2, V1, V2), ”STM” bit = 1 (Start Measurement).

As soon as the measurement cycle is finished, the ”STM” bit is automatically reset by the device.

After a Timing Analysis cycle, reading a zero in STM bit of TIMG register means that the measurement is com-

pleted and the mcu may read the results in Hi and Vi registers.

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