MYSON

TECHNOLOGY

MTV012E

MTV012E Revision 1.2 12/23/1998

8/14

= 0

→ HSYNC input is negative polarity.

Vpol

= 1

→ VSYNC (CVSYNC) is positive polarity.

= 0

→ VSYNC (CVSYNC) is negative polarity.

Hpre

= 1

→ HSYNC input is present.

= 0

→ HSYNC input is not present.

Vpre

= 1

→ VSYNC input is present.

= 0

→ VSYNC input is not present.

Hoff*

= 1

→ HSYNC input's off-level is high.

= 0

→ HSYNC input's off-level is low.

Voff*

= 1

→ VSYNC input's off-level is high.

= 0

→ VSYNC input's off-level is low.

*Hoff and Voff are valid when Hpre=0 or Vpre=0.

HCNTH (r) :

H-Freq counter's high bits.

Hovf

= 1

→ H-Freq counter overflows; this bit is cleared by H/W when condition

removed.

HF10 - HF8 :

3 high bits of H-Freq counter.

HCNTL (r) :

H-Freq counter's low bits.

VCNTH (r) :

V-Freq counter's high bits.

Vovf

= 1

→ V-Freq counter overflows; this bit is cleared by H/W when condition

removed.

VF8 :

High bit of V-Freq counter.

VCNTL (r) :

V-Freq counter's low bits.

PCTR0 (w) :

SYNC processor control register 0.

C1, C0 = 1,1

→ Selects CVSYNC as the polarity, freq and VBLANK source.

= 1,0

→ Selects VSYNC as the polarity, freq and VBLANK source.

= 0,0

→ Disables composite function (MTV012 compatible mode).

= 0,1

→ H/W auto switch to CVSYNC when CVpre=1 and VSpre=0.

HVsel

= 1

→ Pin #16 is P41, pin #17 is P40.

= 0

→ Pin #16 is HBLANK, pin #17 is VBLANK.

STOsel = 1

→ Pin #29 is P42.

= 0

→ Pin #29 is STOUT.

PREFS = 0

→ Selects 8MHz OSC as H/V present check and self-test pattern time base.

= 1

→ Selects 12MHz OSC as H/V present check and self-test pattern time base.

HALFV = 1

→ VBLANK is half frequency output of VSYNC.

HBpl

= 1

→ Negative polarity HBLANK output.

= 0

→ Positive polarity HBLANK output.

VBpl

= 1

→ Negative polarity VBLANK output.

= 0

→ Positive polarity VBLANK output.

PCTR2 (w) :

Self-test pattern generator control.

Selft

= 1

→ Enables generator.

= 0

→ Disables generator.

STbsh = 1

→ 63.5KHz (horizontal) output selected.

= 0

→ 31.75KHz (horizontal) output selected.

Rt1,Rt0 = 0,0

→ Positive cross-hatch pattern output.

= 0,1

→ Negative cross-hatch pattern output.

= 1,0

→ Full white pattern output.

= 1,1

→ Full black pattern output.