Toshiba AD268 Manuale Utente
User’s Manual
63
PART 3 TC218
2. Specifications
2.2 Internal block diagram
The TC218 performs the following operations.
The external analog signals come to the buffer amplifier through the filter. The multiplexer
sequentially selects CH1 to CH8 to convert the input analog signals into digital data via the A/D
converter. The converted digital data reaches to the internal control circuit through optical
isolator. Every time when the T2 CPU requests to read the converted data, the internal control
circuit sends the data to the T2 CPU. The TC218's parameters are stored in the EEPROM.
The external analog signals come to the buffer amplifier through the filter. The multiplexer
sequentially selects CH1 to CH8 to convert the input analog signals into digital data via the A/D
converter. The converted digital data reaches to the internal control circuit through optical
isolator. Every time when the T2 CPU requests to read the converted data, the internal control
circuit sends the data to the T2 CPU. The TC218's parameters are stored in the EEPROM.
F
ilte
r
Buffer
1
3
2
Jumper
F
ilte
r
Buffer
1
3
2
Jumper
A
/D
conve
rsi
on
O
p
ti
cal
isola
tion
CH1
P
N
In
te
rnal
cont
ro
l ci
rc
ui
t
CH8
P
N
F
ilte
r
DC/
DC
conve
rt
e
r
Voltage
check
circuit
circuit
Regulator
+5V
+15V
-15V
AG
P24
COM
LG
FG
EEPROM
LED
T2 CPU
Reference voltage
+15V
F
ilte
r
Buffer
1
3
2
Jumper
CH2
P
N
+15V
M
u
ltip
le
x
e
r
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