Filter
Top Products
18
Fig. 3-1
3. MICROCOMPUTER
Microcomputer TMP87CS38N-3320 has 60k byte of ROM
capacity and equipped with OSD function inside.
The specification is as follow.
• Type name : TMP87CS38N-3320
• ROM : 60k byte
• RAM : 2k byte
• Processing speed : 0.5m s (at 8MHz with Shortest com-
mand)
• Package : 42 pin shrink DIP
•I
2
C-BUS : two channels
• PWM : 14 bit x 1, 7 bit x 9
• ADC : 8 bit x 6 (Successive comparison system, Conver-
sion time 20ms)
IIC device controls through I
2
C bus. (Timing chart : See Fig.
3-1)
• LED uses big current port for output only.
• For clock oscillation, 8MHz ceramic oscillator is used.
•I
2
C has two channels. One is for EPROM only.
• Self diagnosis function which utilizes ACK function of
I
2
C is equipped
• Function indication is added to service mode.
• Remote control operation is equipped, and the control
by set no touch is possible. (Bus connector in the con-
ventional bus chassis is deleted.)
• Substantial self diagnosis function
(1) B/W composite video signal generating function
(micom inside, green crossbar added)
(2) Generating function of audio signal equivalent to
1kHz (micom inside)
(3) Detecting function of power protection circuit opera-
tion
(4) Detecting function of abnormality in IIC bus line
(5) Functions of LED blink indication and OSD indica-
tion
(6) Block diagnosis function which uses new VCD and
AV SW
SDA
SCL
1 - 7
8
9
1 - 7
8
9
1 - 7
8
9
Start
condition
Stop
condition
Address
R/W
Ack Data
Ack
DATA Ack
Approx.180
µ
S
Some device may have no data,
or may have data with several
bytes continuing.