PCA84C646 Philips Semiconductors, PCA84C646 Datasheet - Page 13

• Manufacturer Part Number: PCA84C646
• Description: Microcontrollers for TV tuning control and OSD applications
• Manufacturer: Philips Semiconductors

Philips Semiconductors
1995 Jun 15
handbook, full pagewidth
handbook, full pagewidth
Microcontrollers for TV tuning
control and OSD applications
VSTL = 111 1010; Additional pulses in subperiods 16, 48, 64, 80 and 112.
111 1110
111 1101
111 1011
111 1010
f
127
xtal
3
01
m
00
VSTL
127
Fig.10 Example of TDAC (not inverted) output pulses for several values of VSTH (t
t sub0
decimal value VSTH data latch
0
3/f xtal
t sub16
1
t sub32
2
Fig.9 Fine adjustment output (OUT2).
t sub48
m
t sub16
13
t sub64
m + 1
t r
m + 2
t sub80
PCA84C646; PCA84C846
t sub96
127
t sub112
Preliminary specification
0
sub16
).
1
t sub127
MCD314
MGC572