Hitachi HF-BX1000, Instruction Manual, Page: 102 / 197

4. SPECIFICATIONS
4-17
4.4.2 GPIO specifications
(1) GPIO specifications
Item Specification
Input (*1)(*2)
Input type
5VTTL Level, non-insulation
(negative logic, include pull-up resister (5V,1k Ω ))
Output (*2)
Out put type
Open drain output, non-insulation
(negative logic, include pull-up resister (5V,1k
Ω ))
Maximam current DC 5V 5mA
(*1) This equipment’s GPIO port is non-insulation. Be attention not to apply noises to GPIO
connector when you use GPIO port. Otherwise, this equipment may malfunction under
the influence of a noise etc.
(*2) GPIO signal is effective only in the period which this equipment has been running.
During the period until equipment starts, a signal outputs low-level. Make sure you use
open drain for output of user’s circuit.
(2) Table of GPIO signals
Pin No. Signal name
Meansing Diagram of connection
4 GENDO0 General-purpose output signals.
User can define the meaning of a signal for
every GENDO0~1 output. In addition,
a default output signal is high-level.
5 GENDO1
9 MCALL Maintenance demand signal.
This signal output low-level when the
equipment have a fan failure,
or a temperature failure.
Systems (CPU side) outputs a high level
during normal operation.
6 GENDI0 General-purpose input signals
User can define the meaning of a signal for
every GENDI0~1 input.
Signal width must be tailored to
the width(time) of user program. (*3)
7 GENDI1
8 RMTSHTDN
Shoutdown demand signals.
OS will be shutdown when this signal is
low-level. Moreover, Low-level input
signal must be 1500ms or more. (*3)
3 GND Use this signal as reference voltage of TTL. -
1 and 2 - Do not connect. -
1k Ω
Pin No. ： 6 or 7 or 8
Pin No. ： 3 (GND)
User’s circuit
①
This equipment
+5V(sub-power)
Signal
input
※ For ① , refer to Figure 4-1.
User’s circuit
This equipment
※ For ① , refer to Figure 4-1.
①
1k
Ω
TTL level
receive
circuit
+5V(sub-power) Pin No.
：
4 or 5 or 9
Pin No. ： 3 (GND)
Signal
output