Preliminary W78E378/W78C378/W78C374
*HFCOUNTH: Horizontal frequency counter register, high byte (Read Only)
BIT
0
NAME
HF8
FUNCTION
H frequency count bit 8
H frequency count bit 9
1
HF9
2
HF10
HF11
-
H frequency count bit 10
H frequency count bit 11
-
3
-
4 5
6
7
NOH
HPOL
Set by hardware if no Hin signal
Hin polarity. 0: Positive, 1: Negative
*VFCOUNTL: Vertical frequency counter register, low byte (Read Only)
BIT
0
NAME
VF0
VF1
VF2
VF3
VF4
VF5
VF6
VF7
FUNCTION
V frequency count bit 0
V frequency count bit 1
V frequency count bit 2
V frequency count bit 3
V frequency count bit 4
V frequency count bit 5
V frequency count bit 6
V frequency count bit 7
1
2
3
4
5
6
7
*VFCOUNTH: Vertical frequency counter register, high byte (Read Only)
BIT
0
NAME
VF8
FUNCTION
V frequency count bit 8
V frequency count bit 9
1
VF9
2
VF10
VF11
-
V frequency count bit 10
3
V frequency count bit 11
-
-
4 5
IN
6
7
NOV
VPOL
Set by hardware if no V signal
IN
V
polarity. 0: Positive, 1: Negative
* INTVECT: Interrupt Vector Register (Read Only)
BIT
0
NAME
SCLINT
ADCINT
DDC1INT
SOAINT
VEVENT
FUNCTION
SCL pin pulled low detected
1
ADC conversion completed
2
DDC1 port buffer empty
3
SOA condition happen
4
Vsync pulse detected or NOV = 1 (V counter overflow)
(The VEVENT is designed to be generated only 'one' time
if no Vsync input.)
5
PARAINT
Parabola Interrupt generated
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