參數(shù)資料
型號(hào)： M37274MA-052SP
廠商： Mitsubishi Electric Corporation
英文描述： PHOTO SM DETECTOR
中文描述： 單芯片8位CMOS微機(jī)隱蔽字幕解碼器和屏幕顯示控制器
文件頁(yè)數(shù)： 7/147頁(yè)
文件大?。?/td> 2042K
代理商： M37274MA-052SP
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7
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
M37274EFSP
PRELIMINARY
Notice: This is not a final specification.
Some paramentic limits are subject to change.
MITSUBISHI MICROCOMPUTERS
Ports P6
3
and P6
4
are 2-bit input port.
Pin P6
3
is also used as OSD clock input pin OSC1.
Pin P6
4
is also used as OSD clock output pin OSC2. The output structure is CMOS output.
Pin P6
4
is also used as sub-clock output pin X
COUT
. The output structure is CMOS output.
Pin P6
3
is also used as sub-clock input pin X
CIN
.
Ports P7
0
–P7
2
are 3-bit input port.
Pins P7
0
, P7
1
are also used as data slicer input pins CV
IN
, V
HOLD
respectively. When
using data slicer, input composite video signal through a capacitor. Connect a capacitor
between V
HOLD
and V
SS
.
Pins P7
2
pin is also used as input/output pin for data slicer RVCO. When using data slicer,
connect a resistor between RVCO and V
SS
.
When using data slicer, connect a filter using of a capacitor and a resistor between HLF
and V
SS
.
This is an analog input pin AD6.
This is a horizontal synchronous signal input for OSD.
This is a vertical synchronous signal input for OSD.
PIN DESCRIPTION (continued)
Note :
As shown in the memory map (Figure 5), port P0 is accessed as a memory at address 00C0
16
of zero page. Port P0 has the port P0
direction register (address 00C1
16
of zero page) which can be used to program each bit as an input (“0”) or an output (“1”). The pins
programmed as “1” in the direction register are output pins. When pins are programmed as “0,” they are input pins. When pins are
programmed as output pins, the output data are written into the port latch and then output. When data is read from the output pins, the
output pin level is not read but the data of the port latch is read. This allows a previously-output value to be read correctly even if the
output “L” voltage has risen, for example, because a light emitting diode was directly driven. The input pins float, so the values of the pins
can be read. When data is written into the input pin, it is written only into the port latch, while the pin remains in the floating state.
Pin
Name
Functions
Input/
Output
Input
Input
Output
Output
Input
Input
Input
Analog input
H
SYNC
input
V
SYNC
input
Input
Input
Input
I/O
Input/output for
data slicer
P6
3
/OSC1/
X
CIN
,
P6
4
/OSC2/
X
COUT
P7
0
/CV
IN,
P7
1
/V
HOLD
,
P7
2
/RVCO
HLF/AD
6
H
SYNC
V
SYNC
Input port
Clock input for OSD
Clock output for OSD
Sub-clock output
Sub-clock input
Input port P7
Input for data slicer
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