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IC2
SW3
RESET
DETECTOR
RESET SW
X1
24.0MHz
ICU PWR
RELAY 0-3
AUX
RELAY
To
CN4
Power
Distribution
EXTERNAL
P-SENS1,2
PHOT
Panel
CONTROL
COUPLER
3-1. DESCRIPTION OF JTC-C200
The JTC-C200 main components are as follows.
• CPU (IC1)
: Control processor
• FLASH ROM (IC16) : Writing control programs
• SRAM (IC15)
: Work area for CPU
• LCD
: Operating status display panel
• QUAD UART (IC8) : Serial communication I/O
• EEPROM (IC18)
: Storing brightness information
by presetting
Also, the following areas have been mapped in the CPU
(IC1).
• ROM (FLASH)
• SRAM
• LCD
• UART x 4
• EEPROM
JTC-C200 provides four communication ports;
[CONTROL 1] and [CONTROL 2] are RS422 (D-sub 15
pin) terminals used for communication with JTC-P200 and
other peripheral equipment, and [COM 1] and [COM 2]
are RS232C (D-sub 9 pin) terminals used for
communication with a computer and modem.
JTC-C200
SECTION 3
CIRCUIT DESCRIPTIONS
RES
ADDRESS BUS
DATA BUS
P62
CS0
CS0
ı
CS4
EXTAL
CLOCK
CS1
IC1
CPU
P90
ı
P93
CS2
P94
P95
PA 0-7
KEY MATRIX
KEYDATA0-4 , KEYEN0-4
Fig 1. Block Diagram
X2
IC16
1.8532MHz
IC8
FLASH
QUAD
ROM
UART
CSA
CSB
IC15
CSC
CSD
SRAM
IC10
ADDRESS
DECODER
IC18
EEPROM
IC19
PLD
CLOCK
As a system composition where the JTC-C200 and JTC-
P200 are connected ,when both powers are turned on, a
communication between JTC-C200 and JTC-P200 starts
automatically, and the LCD panel display changes from
initial screen to normal screen.
Under this condition, normal operation is possible.
The CPU (IC1) scans the keyboard at certain interval to
judge the status of a key pressed. After judging the pressed
key, it transmits the information to the JTC-P200 through
communication protocol in order to allow operation that
corresponds to that key. Also, it displays the information
according to that status on the LCD panel, and turns on or
off the key switch LED as necessary.
[COM 1] and [COM 2] terminals can send the operation
information to the computer and modem through the
communication protocol in the same manner.
Further, this set has a relay circuit assigned to the
[EXTERNAL CONTROL] terminal, and it can turn on/off
the circuits such as a distribution board connected to this
terminal.
CN1
RXD0, CTS0, DSR0, DCD0,
IC7
RI0, TXD0, RTS0, DTR0
COM
DRV/REV
1
RXD1, CTS1, DSR1, DCD1,
CN2
IC9
RI1, TXD1, RTS1, DTR1
DRV/REV
COM
2
IC11
TXD2, RTS2, DTR2
CN3
DRIVER
CONTROL
IC12
RXD2, CTS2, DSR2
1
RECEIVER
CN5
IC13
TXD3, RTS3, DTR3
DRIVER
CONTROL
IC14
RXD3, CTS3, DSR3
2
RECEIVER
LCD DISPLAY
3-1(E)
To
Computer
or
Modem
To
Computer
or
Modem
To
JTC-P200
To
JME-SA200
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