UPD6461GS NEC [NEC], UPD6461GS Datasheet - Page 53

• Manufacturer Part Number: UPD6461GS
• Description: CMOS LSI CHIP FOR CAMCORDER ON-SCREEN CHARACTER DISPLAY 12 ROWS x 24 COLUMNS
• Manufacturer: NEC [NEC]

CHARACTER AND BLK SIGNAL OUTPUT
OUTPUT TIMINGS (T
Note Min.: (1/f
TIMING FOR CONTINUOUS COMMAND INPUT
(T
f
Commands other than VRAM write commands may not comply with T2 provided the control clock cycle satisfies the specifications.
OSC
Output delay of character/BLK signal
Output delay of character/BLK signal
Rise time of character/BLK signal
Rise time of character/BLK signal
Fall time of character/BLK signal
Fall time of character/BLK signal
Time equivalent to minimum dot
Time equivalent to minimum dot
Continuous command input timing 1
Continuous command input timing 2
A
Dot clock
Character signal
BLK signal
Character and BLK signals are output in synchronization with the falling edges of the dot clock.
When inputting commands continuously, the following timing requirements must be observed:
: Frequency of LC oscillation or external input clock (MHz), S: Character size (single (minimum) or double), t
= –20 to +75˚C, V
f
OSC
: Frequency of LC oscillation or external input clock.
Parameter
Parameter
OSC
) – 5 ns, Max.: (1/f
DD
A
DATA
CLK
= –20 to +75˚C, pins: V
= 2.7 to 5.5 V)
Hi-Z
Symbol
OSC
DTW
DTW
CDL
CDL
CUS
CUS
CDS
CDS
) + 5 ns
Symbol
50 %
T1
T2
R
V
V
V
V
V
V
V
V
, V
DD
DD
DD
DD
DD
DD
DD
DD
50 %
CDL
G
= 4.5 to 5.5 V, output load capacity = 10 pF
= 2.7 to 3.3 V, output load capacity = 10 pF
= 4.5 to 5.5 V, output load capacity = 10 pF
= 2.7 to 3.3 V, output load capacity = 10 pF
= 4.5 to 5.5 V, output load capacity = 10 pF
= 2.7 to 3.3 V, output load capacity = 10 pF
= 4.5 to 5.5 V, output load capacity = 10 pF
= 2.7 to 3.3 V, output load capacity = 10 pF
For all commands
For VRAM write
commands
, V
B
, V
Pins in parentheses are selected by specifying a mask option.
BLK
Hi-Z
T1
, V
Conditions
DTW
C1
Conditions
, BLK1, V
When display is
turned on
When display is
turned off
C2
T2
, BLK2, (R
2 s + (21/f
2 s + (12/f
10 %
BLK
S +t
Min.
2.0
Hi-Z
, G
S
CUS
HWL
Min.
(1 /Oscillation
frequency) 5
(1 /Oscillation
frequency) 5
BLK
10
15
OSC
OSC
2
4
2
4
90 %
, B
)
)
PD6461, 6462
BLK
HWL
Typ.
Typ.
18
35
))
: Hsync width.
Note
Note
Max.
Max.
CDS
30
80
10
25
10
25
Unit
Unit
ns
ns
ns
ns
ns
ns
ns
ns
s
s
s
53