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Signal Connection to External Devices
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I/O Circuit and Electrical Characteristics
I/O circuit
The following illustration is a simplified diagram of the input/output
circuitry of the slave DSP digital I/O.
Electrical characteristics
The slave DSP digital I/O have TTL output/input levels with the
following characteristics.
Output
Enable
33
Ω
10 k
Ω
VCC
→
I
Slave I/O
Parameter
Value
Min.
Max.
Input voltage
High
Low
2.0 V
0 V
5.0 V
0.8 V
Output voltage
High
Low
2.4 V
0 V
5.0 V
0.4 V
Output current
–13 mA
+13 mA
Input current
(The current direction is shown in the circuit
diagram above.)
500
µ
A
Power-up default
All digital I/O output circuits
are disabled and driven to
VCC by the built-in 10 k
Ω
pull-up resistors.
Summary of Contents for CLP1104
Page 6: ...Contents DS1104 Hardware Installation and Configuration March 2004 I 6 ...
Page 20: ...Safety Precautions DS1104 Hardware Installation and Configuration March 2004 I 20 ...
Page 118: ...Mapping of I O Signals DS1104 Hardware Installation and Configuration March 2004 I 118 ...
Page 162: ...Data Sheets DS1104 Hardware Installation and Configuration March 2004 I 162 ...
