3. Detailed Description of Functions
8
EPSON
S1V30333/300/120 Evaluation Board
User Guide (Rev. 1.03)
3.3 Reset
Table 3-4 shows the different reset switch types and their uses. Reset switches SW4 and SW2 must
always be pressed in that sequence immediately after turning on the power supply.
Table 3-4 Reset switches
Reset switch
Power supply
SW2
Main hard reset
SW4
FT232BL IC reset
SW17
Audio IC reset
Ú
SW2 resets the S1C33E07 and audio IC.
3.4 SPI
interface
The evaluation board includes an SPI master interface and SPI slave interface connectors. Tables 3-5
and 3-6 show the pin layout for the SPI interface connectors.
The side sending the clock (SCLK) is defined as the master. The receiving side is defined as the
slave.
Table 3-5 SPI master connectors (Code: Omron XG4M-1430-U MIL; standard product)
J10
−
SPI I / F MASTER
Pin No.
I/O
Signal
Pin No.
I/O
Signal
1 I
VDD
2 I
GND
3 I
SIN
4 O
SCLK
5 O
SOUT
6 O
NSCSM
7 I
GND
8 I
GPIOA3/MSGRDY
9 O GPIOA4/STBY 10 O
MUTE
11 O
RSTM
12 I
GND
13
−
NC 14
−
NC
Table 3-6 SPI slave connectors (Code: Omron XG4M-1430-U MIL; standard product)
J11
−
SPI I / F SLAVE
Pin No.
I/O
Signal
Pin No.
I/O
Signal
1 I
VDD
2 I
GND
3 O
SOUT
4 I
SCLK
5 I
SIN
6 I
NSCSS
7 I
GND
8 O
GPIOA3/MSGRDY
9 I GPIOA4/STBY 10 I
MUTE
11 I
RSTS
12 I
GND
13
−
NC 14
−
NC
15
−
NC 16
−
NC
