HCS08 datasheet(266/374 Pages) NXP

266 / 374 page

Serial Peripheral Interface (S08SPI16V1)

MC9S08JM60 Series Data Sheet, Rev. 5

266

Freescale Semiconductor

SPIxC2 = 0xC0(%11000000)

Bit 7

SPMIE

= 1

SPI hardware match interrupt enabled

Bit 6

SPIMODE

= 1

Configures SPI for 16-bit mode

Bit 5

= 0

Unimplemented

Bit 4

MODFEN

= 0

Disables mode fault function

Bit 3

BIDIROE

= 0

SPI data I/O pin acts as input

Bit 2

= 0

Unimplemented

Bit 1

SPISWAI

= 0

SPI clocks operate in wait mode

Bit 0

SPC0

= 0

uses separate pins for data input and output

SPIxBR = 0x00(%00000000)

Bit 7

= 0

Unimplemented

Bit 6:4

= 000

Sets prescale divisor to 1

Bit 3

= 0

Unimplemented

Bit 2:0

= 000

Sets baud rate divisor to 2

SPIxS = 0x00(%00000000)

Bit 7

SPRF

= 0

Flag is set when receive data buffer is full

Bit 6

SPMF

= 0

Flag is set when SPIMH/L = receive data buffer

Bit 5

SPTEF

= 0

Flag is set when transmit data buffer is empty

Bit 4

MODF

= 0

Mode fault flag for master mode

Bit 3:0

= 0

Unimplemented

SPIxMH = 0xXX

In 16-bit mode, this register holds bits 8–15 of the hardware match buffer. In 8-bit mode, writes to this register will be

ignored.

SPIxML = 0xXX

Holds bits 0–7 of the hardware match buffer.

SPIxDH = 0xxx

In 16-bit mode, this register holds bits 8–15 of the data to be transmitted by the transmit buffer and received by the

receive buffer.

SPIxDL = 0xxx

Holds bits 0–7 of the data to be transmitted by the transmit buffer and received by the receive buffer.

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