參數(shù)資料
型號： P87C770
廠商： NXP Semiconductors N.V.
英文描述： Microcontrollers for NTSC TVs with On-Screen Display (OSD) and Closed Caption (CC)(在NTSC TV中應(yīng)用的具有屏幕顯示和字幕關(guān)閉特點的微控制器)
中文描述： 微控制器用于NTSC電視的屏幕顯示（OSD）和字幕（CC）的（在NTSC電視中應(yīng)用的具有屏幕顯示和字幕關(guān)閉特點的微控制器）
文件頁數(shù)： 73/80頁
文件大?。?/td> 266K
代理商： P87C770
1999 Jun 11
73
Philips Semiconductors
Product specification
Microcontrollers for NTSC TVs with On-Screen
Display (OSD) and Closed Caption (CC)
P8xCx70 family
23 AC CHARACTERISTICS
V
DD
= 4.5 to 5.5 V; V
SS
= 0 V; T
amb
=
20 to +70
°
C. All voltages with respect to V
SS
, unless otherwise specified.
Note
1.
Susceptibility for environment noise @ 1 V
PP
CVBS, 25
°
C;12 MHz.
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
Ports 0, 1 and 3 outputs (open-drain)
t
f(o)
output fall time
C
L
= 35 pF; (slope control
implemented)
30
ns
ALE, PSEN and EA outputs (slope control implemented)
t
r(o)
t
f(o)
output rise time
output fall time
C
L
= 40 pF
C
L
= 40 pF
30
ns
ns
XI and XO
f
xtal
crystal frequency
12
MHz
AFT inputs: P1.0/AFT0, P1.1/AFT1 and P1.2/AFT2
T
AFT(con)
conversion time
f
xtal
= 12 MHz
8
μ
s
FB output
t
r(FB)
t
f(FB)
FB rise time
FB fall time
C
L
= 35 pF
4
4
ns
ns
CVBS Closed Caption behaviour
white noise (rms value)
co-channel interface
(peak-to-peak value)
eye height
60
100
mV
mV
PP
55
%
Power-on reset
T
r
POR response time
at power-on V
DD
: 0
→
5 V
voltage spike V
DD
: 5 V
→
V
t
at power-on V
DD
: 0
→
5 V
voltage spike V
DD
: 5 V
→
V
t
5
5
10
10
μ
s
μ
s
μ
s
μ
s
t
W
POR pulse width
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