Detailed Interface Descriptions; Power Supply; Clocks; Reset - Epson S1V30120 User Manual

4. Detailed Interface Descriptions

4.1

Power Supply

FIRECREST receives power from the J5 Connector when connected to the NIGHTINGALE board.
Two yellow LEDs are fitted which indicate whether power is being supplied to the 3.3V and 1.8V –
these are marked as 3.3V (LED1) and 1.8V (LED2) respectively on the board.
4.2

Clocks

FIRECREST requires only a single external clock of 32.768kHz for operation. The clock oscillator
Y1 on the board supplies this signal.
4.3

Reset

Switch SW7 allows the FIRECREST board to be reset. The reset is commoned with SYS_RESET on
the NIGHTINGALE board.
4.4

SPI Interfaces

The S1V30120 has a single SPI Slave Interface. Table 3 shows the pin-out of the SPI Test Connector.
The SPI Slave Interface uses the signals SIN, SOUT, SCLK, SFRM1 for serial data in, serial data out,
serial clock, and slave select respectively.
The SPI test-connectors uses a 6-pin AMP MicroMatch Test connector.
S1V30120 Evaluation Board (FIRECREST)
User Guide (Rev 2.0)
Table 3 SPI Slave Test Connector
J4 – SPI Slave
Pin SPI S Signal
1 GND
2 SOUT
3 SCLK
4 SIN
5 SFRM1
6 GND
EPSON
4. Detailed Interface Descriptions
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