Z8612900100ZCO Datasheet, PDF (21/25 Pages) Zilog, Inc. – One DB25 pin (M-F) cable for printer port connection

Line 21 Decoder Demo Board Kit
User Manual
16
+5V
R2
10K
14
C1
102P
15
1
2
3
U1A
CEXT
REXT/CEXT
A
B
CLR
74HC123
+5V
VCC ¹⁶
GND ⁸
13
Q
Q4
+5V
VR2
20K VAR
3
WHSYNC
U1B
6 _CEXT
C3
102P
1
7 _REXT/CEXT
9
10
A
11
B
CLR
74HC123
+5V
VCC ¹⁶
GND ⁸
Q5
Q ¹²
WHSYNC
H-SYNC SELECTION
+5V
C9-7
C4
104P
JP2
3
2
1
SV1_HSYNC
TP1
C9-8
J1
Video In
1
C8
104P
R5
75
R6
680K
C7
104P
C9
104P
+5V
U4
8
1
2
6
4
VCC
CSYNC
CMPVID VSYNC
RESET OD/EVN
GND BRST/BK
3
7
5
LM1881
: Default Jumper Setting
+5V
R1
10
+5VA
JP1
3
2
1
SV2_HSYNC
C2
104P
U2
LC555N
4 _RST
3 _OUT
5
CON
DIS ⁷
THRES ⁶
2
TRIG
2
VR1
1K VAR
R3
1.8K
R4
3.3K
C5
104P
C6
103P
U3D
U3E
9
8
11
10
74HC04
U3A
1
74HC04
2
H_OUT
U3F
13
12
JP3
3
74HC04
V_OUT
74HC04
C10-3
2
1
U3B
3
4
V1SYNC
BRST_OUT
74HC04
ZILOG, INC.
2 Venture Plaza, Suite 400, Irvine, CA 92618
Title
Z86230/229 Video Front End
Size Document Number
A
230DB-1
Date: Sunday, August 08, 1999
Sheet
1 of
Rev
1.12
5
Schematics
Figure 10. Video Front End Schematic
Preliminary
UM015902-0803