tmp88cs34ng TOSHIBA Semiconductor CORPORATION, tmp88cs34ng Datasheet - Page 177

• Manufacturer Part Number: tmp88cs34ng
• Description: Cmos 8-bit Microcontroller
• Manufacturer: TOSHIBA Semiconductor CORPORATION

2.14.6.6 Interrupt Control
VD
Note 1: The display line counter also increments when a line with all blank characters or a line with display off is
Note 2: When display lines are overlapped each other, previous display line is enabled and next line is disabled.
signal
(1) Display line counter
specified.
At this time, the display line counter does not increment for disabled line.
the TV screen. The display line counter is a 4-bit counter which is initialized to “0”
by the falling edge of the
each display line is completed (falling edge of the
read out display line counter several times, because it does not synchronize CPU
clock.
The display line counter indicates number of display line (s) by OSD circuit on
Display line counter register (4 bits) ··· DCTR (bit 3 to 0 in ORIRC)
Display line
counter
“0000” ··· No display line is completed.
“0001” ··· 1st display line is completed.
“0010” ··· 2nd display line is completed.
“1111” ··· 15th display line is completed.
to
Figure 2.14.33 Display Line Counter
1st Display Line
2nd Display Line
3rd Display Line
4th Display Line with all blank characters
10th Display Line
11th Display Line
12th Display Line
88CS34-177
VD
signal and which increments when last scanning of
:
:
to
Display on
Display off
Display on
Display on
Display on
Display on
Display on
HD
signal). It is necessary to be
TMP88CS34/CP34
2007-09-12