TC35679FSG-002

2018-01-17

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4.4. SPI Interface

4.4.1.

Features

TC35679 has the following main features for a serial memory interface



Operation voltage:

1.8 to 3.6 V



SPI interface



Chip select:

1 ch



Chip select polarity:

Selectable: High-active and Low-active



Serial clock master operation: Polarity and phase are adjustable (4 combinations are selectable)



Serial clock frequency:

25 Hz to 6.5 MHz



Serial data transfer mode:

MSB-first, LSB-first

SPI interface can operate at 1.8 to 3.6 V depending on VDDIO, however, because the power supply pin is shared with SPI

interface and the other hardware interfaces, SPI interface cannot operate at a different voltage from the others.

4.4.2.

Connection Example

TC35679 SPI interface can be connected to serial EEPROMs and serial Flash-ROMs and has 1 chip select port. Figure 4-11

shows a connection example, where a serial Flash-ROM is connected to TC35679 SPI interface.

Figure 4-11 Connection example for serial Flash-ROM using SPI interface

Chip select (SPI-SCS)

Serial clock (SPI-SCLK)

Write data (SPI-DOUT)

Read data (SPI-DIN)

Serial

Flash-ROM

TC35679