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參數(shù)資料
| 型號(hào)： | VCT3801A |
| 廠商： | MICRONAS SEMICONDUCTOR HOLDING AG |
| 英文描述： | Video/Controller/Teletext IC Family |
| 中文描述： | 視頻/控制/圖文電視IC系列 |
| 文件頁(yè)數(shù)： | 144/172頁(yè) |
| 文件大小： | 2243K |
| 代理商： | VCT3801A |
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VCT 38xxA
ADVANCE INFORMATION
144
Micronas
6.4. Pin Descriptions for PMQFP128 package
Pins 1, 4
15, 18
22, 128,
ADB0
ADB18
Address
Bus Output (Fig. 6–30)
These 19 lines provide the CCU address bus output to
access external memory.
Pin 2, 16,
VSUPADB*
Supply Voltage, Address Bus
Driver
This pin is used as supply for the address bus driver.
Pin 3, 17,
GNDADB
*
Ground, Address Bus Driver
This is the ground reference for the address bus driver.
Pins 23
26, 29
32,
DB0
DB7
Data Bus Input/Out-
put (Fig. 6–31)
These 8 lines provide the bidirectional CCU data bus
to access external memory.
Pin 27,
VSUPDB*
Supply Voltage, Data Bus Driver
This pin is used as supply for the CCU data bus driver.
Pin 28,
GNDDB
*
Ground, Data Bus Driver
This is the ground reference for the CCU data bus
driver.
Pin 55,
DISINTROM
Disable Internal ROM Input
(Fig. 6–6)
A high level at this pin disables the internal CCU pro-
gram memory during reset. In this case the CCU loads
the control word from external address location
h’FFF9.
Pin 56
59,
P27
P24
I/O Port (Fig. 6–28)
These pins provide CCU controlled I/O ports.
Pin 60,
VSUPP2*
Supply Voltage, Port 2 Driver
This pin is used as supply for the I/O port 2 driver.
Pin 61,
GNDP2
*
Ground, Port 2 Driver
This is the ground reference for the I/O port 2 driver.
Pins 66
74,
VBCLK, VB0
VB7
Digital Video Bus
Input (Fig. 6–32)
In future versions of VCT 38xxA these pins will provide
the ITU
R 656 video interface. As long as the ITU-R
656 video interface is not available, these pins have to
be connected to GND
D
.
Pin 75,
CLK20
Main Clock Output (Fig. 6–9)
This is the 20.25 MHz main clock output.
Pin 79
82, 85
88,
P37
P30
I/O Port (Fig. 6–28)
These pins provide CCU controlled I/O ports.
Pin 83,
VSUPP3*
Supply Voltage, Port 3Driver
This pin is used as supply for the I/O port 3 driver.
Pin 84,
GNDP3
*
Ground, Port 3Driver
This is the ground reference for the I/O port 3 driver.
Pin 124,
WE1Q
Write Enable Output 1 (Fig. 6–30)
This pin controls the direction of data exchange
between the CCU and the external program memory
device.
Pin 125,
WE2Q
Write Enable Output 2 (Fig. 6–30)
This pin controls the direction of data exchange
between the CCU and external the teletext page mem-
ory device.
Pin 126,
OE1Q
Output Enable Output 1 (Fig. 6–30)
This pin is used to enable the output driver of the exter-
nal program memory device for read access.
Pin 127,
OE2Q
Output Enable Output 1 (Fig. 6–30)
This pin is used to enable the output driver of the exter-
nal teletext page memory device for read access.
* Application Note:
All ground pins should be connected to one low-resis-
tive ground plane. All supply pins should be connected
separately with short and low-resistive lines to the
power supply. Decoupling capacitors from VSUP
xx
to
GND
xx
are recommended as closely as possible to
these pins. Decoupling of VSUP
D
and GND
D
is most
important. We recommend using more than one
capacitor. By choosing different values, the frequency
range of active decoupling can be extended.
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| VCT3811A | 制造商:MICRONAS 制造商全稱:MICRONAS 功能描述:Video/Controller/Teletext IC Family |
| VCT3831A | 制造商:MICRONAS 制造商全稱:MICRONAS 功能描述:Video/Controller/Teletext IC Family |
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