upd6461 Renesas Electronics Corporation., upd6461 Datasheet - Page 3

• Manufacturer Part Number: upd6461
• Description: Cmos Lsi Chip For Camcorder On-screen Character Display 12 Rows X 24 Columns
• Manufacturer: Renesas Electronics Corporation.

DATA
CK
OSC
Hsync
Vsync
OSC
CLK
CS
OUT
OUT
IN
Oscil-
lator
Synchro-
nization
protection
circuit
Data input shift
register
Horizontal size
counter
Character size
register
Vertical size
counter
Horizontal address
register for
display position
Vertical address
register for
display position
Horizontal
position counter
Vertical position
counter
Horizontal address
counter
Instruction decoder
Write address
counter
Vertical address
counter
Character
generator ROM
12 × 18 bits
× 256 words
( PD6461)
/ × 128 words
( PD6462)
Control signals
µ
µ
Char-
acter
data
8 bits
× 288
words
Color
data
3 bits
× 288
words
Video RAM
V
Blink
data
1 bit
× 288
words
R
V
G
Re-
verse
data
1 bit
× 288
words
V
(B
Output controller
B
BLK
V
)
BLK
Out-
put
speci-
fication
data
1 bit
× 288
words
V
C1
BLK1 V
Back-
ground
control
data
register
(B
BLK
(R
C2
BLK
)
BLK2
)
Display
control
data
register
TEST
V
GND
PCL
DD