Panasonic JB-3300 Technical Manual page 205

(g) Blink timing circuit
The blink timing circuit controls the blink timing of characters and
cursor in the TEXT display mode. Both the cursor blink signal and
character blink signal have the duty cycle of 50%. The cursor blink
period is 16 fields and the character blink period is 32 fields.
Figure 5-59 shows a blink timing circuit diagram.
LS20
L1H )p-& (XCHR BLINK) £5y
R45
= KCURSOR DLY 560 oF bl! CU
; 2 MH D2
fo 98 +5V Ti3zp7c LN25RP
ABCD
VSINC Latch — _ ! cK12H 13 Cc OD LSOO
ayy L S393
GRAPHIC
(5-SF)
Figure 5-59 Blink Timing Circuit
Figure 5-60 shows an operation timing chart.
VSYNC Latch
10,
205 LIS
B UL
2Q
20, | | |
(Cursor Blink)
225 7 [
(Character Blink)
_ 8-field time 8-field time
Cursor OFF — Cursor ON
16- field time _ i6 - field time _
Characters ON Characters OFF
Figure 5-60 Blink Timing Timing Chart.
IT - 85