HCS08 datasheet(241/374 Pages) NXP

241 / 374 page

MC9S08JM60 Series Data Sheet, Rev. 5

Freescale Semiconductor

241

Chapter 15

16-Bit Serial Peripheral Interface (S08SPI16V1)

15.1

Introduction

The 8- or 16-bit selectable serial peripheral interface (SPI) module provides for full-duplex, synchronous,

serial communication between the MCU and peripheral devices. These peripheral devices can include

other microcontrollers, analog-to-digital converters, shift registers, sensors, memories, etc.

The SPI runs at a baud rate up to the bus clock divided by two in master mode and up to the bus clock

divided by four in slave mode. Software can poll the status flags, or SPI operation can be interrupt driven.

The SPI also supports a data length of 8 or 16 bits and includes a hardware match feature for the receive

data buffer.

The MC9S08JM60 series have two serial peripheral interface modules (SPI1 and SPI2). The four pins

associated with SPI functionality are shared with PTB[3:0] and PTE[7:4]. See Appendix A, “Electrical

Characteristics,” for SPI electrical parametric information.

15.1.1

SPI Port Configuration Information

By default, the input filters on the SPI port pins will be enabled (SPIxFE=1), which restricts the SPI data

rate to 6 MHz, but protects the SPI from noise during data transfers.To configure the SPI at a baud rate of

6MHz or greater, the input filters on the SPI port pins must be disabled by clearing the SPIxFE in SOPT2.

and also enable the high output drive strength selection on the affected SPI port pins.

HCS08 bảng dữ liệu(PDF) 241 Page - NXP Semiconductors