VDP313XY datasheet(49/76 Pages) MICRONAS

49 / 76 page

ADVANCE INFORMATION

VDP 313xY

Micronas

Table 2–8: Control Registers of the Fast Processor for control of the video backend functions

−default values are

initializied at reset

FP Sub-

address

Function

Default

Name

(hex)

FP Display Control Register

130

White Drive Red (0...1023)

700

WDR 1)

131

White Drive Green (0...1023)

700

WDG 1)

132

White Drive Blue (0...1023)

700

WDB 1)

139

Internal Brightness, Picture (0...511), the center value is 256, the

range allows for both increase and reduction of brightness.

256

IBR

13C

Internal Brightness, Measurement (0...511), the center value is

256, the brightness for measurement can be set to measure at

higher cutoff current. The measurement brightness is indepen-

dent of the drive values.

256

IBRM

13A

Analog Brightness for external RGB (0...511), the center value is

256, the range allows for both increase and reduction of bright-

ness.

256

ABR

13B

Analog Contrast for external RGB (0...511)

350

ACT

1) The white drive values will become active only after writing the blue value WDB, latching of new values is indi-

cated by setting the MSB of WDB.

FP Display Control Register, BCL

144

BCL threshold current, 0...2047 (max ADC output ~1152)

1000

BCLTHR

142

BCL time constant 0...15 ➠13 ... 1700 ms

BCLTM

143

BCL loop gain. 0..15

BCLG

145

BCL minimum contrast 0...1023

307

BCLMIN

105

Test register for BCL/EHT comp. function, register value:

normal operation

stop ADC offset compensation

x>1

use x in place of input from Measurement

ADC

0BCLTST

Current BCL reduction (0...1023; read only)

1023

BCLREDUC

FP Display Control Register, Deflection

103

interlace offset,

−2048..2047

This value is added to the SAWTOOTH output during one field.

0INTLC

102

discharge sample count for deflection retrace,

SAWTOOTH DAC output impedance is reduced for DSCC lines

after vertical retrace.

7DSCC

11F

vertical discharge value,

SAWTOOTH output value during discharge operation, typically

same as A0 init value for sawtooth.

−1365

DSCV

10B

EHT compensation vertical gain coefficient, 0...511

EHTV

VDP313XY データシート(PDF) 49 Page - Micronas

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