Furuno GF-8801, Hardware Specifications, Page: 21 / 31

GF-8801, GF-8802, GF-8803
Hardware Specifications
SE19-410-006-00
17
10.3 Reset
This product has an internal power-on reset circuit which detects the VCC voltage and creates POR_N
(power-on reset) signal form initializing the module. Table 10.3-1 shows the threshold voltages to detect and
create POR_N signal.
Table 10.3-1. Power-on reset voltage
Item Symbol MIN TYP MAX Unit
Note
Power on reset threshold
voltage (rising)
V
RTH_POR
- - 3.3 V
Power on reset threshold
voltage (falling)
V
FTH_POR
2.7 - - V
This product can also be controlled by external reset signal (RST_N) with the following sequence.
t
RSTLW
L
H
Figure 10.3-1. Reset sequence
Table 10.3-2. Reset sequence
Item Symbol Min. Max. Unit Note
Reset pulse width T
RSTLW
300 - ms
10.4 Interface Signal
Table 10.4-1 shows the interface signal specifications. These are specifications when the terminal temperature
of this product is 25 °C.
Table 10.4-1. Interface signal
Item Symbol MIN TYP MAX Unit
Note
Low-Level input voltage V
IL
- - 0.8 V
High-Level input voltage V
IH
2.0 3.3 5.5 V
Low-Level output voltage V
OL
- - 0.4 V l
OL
= 16mA
High-Level output voltage V
OH
2.4 3.3 3.6 V I
OH
= -18mA
Digital input pull-up resistor R
PU
9.5 10 10.5
kΩ
Digital input pull-down
resistor
R
PD
9.5 10 10.5
kΩ
Digital input pull-up voltage V
PU
- 3.3 - V