FP-30 User’s Manual
Chapter 8 Interfacing with the hardware board (On-board connection) 86
8.3
Electrical characteristics of the target interface
8.3.1
DC characteristics
SPI signals (SCLK, CS1, SI/SIO0, SO/SIO1, SIO2, SIO3,CS2)
Symbol
Min
Type
Max
Units
VIL (Input Low Voltage)
3.3V
0.8
V
2.5V
0.7
1.8V
0.38
VIH (Input High Voltage)
3.3V
2.0
V
2.5V
1.7
1.8V
0.8
VOL (Output Low Voltage)
3.3V
0.4
V
2.5V
0.4
1.8V
0.45
VOH (Output High Voltage)
3.3V
2.9
V
2.5V
2.1
1.8V
1.35
*
: In the case of On-board connection, the signal/waveform may be disturbed/distorted depending on the length of the wire and load
from the FP-30 unit to the SPI flash memory. If the waveform distortion exceeds the device specifications, connect a damping
resistor into the signal line to suppress the disturbance.
8.3.2
AC characteristics
SPI signals (SI/SIO0, SO/SIO1, SIO2, SIO3)
Symbol
Min
Type
Max
Units
tSU (Input Setup Time)
10
ns
tHD (Input Hold Time)
0
ns
tHO (Output Hold Time)
5
ns
