MC68HC908GZ8 FREESCALE [Freescale Semiconductor, Inc], MC68HC908GZ8 Datasheet - Page 231

• Manufacturer Part Number: MC68HC908GZ8
• Description: M68HC08 Microcontrollers
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

Chapter 17
Serial Peripheral Interface (SPI) Module
17.1 Introduction
This section describes the serial peripheral interface (SPI) module, which allows full-duplex, synchronous,
serial communications with peripheral devices.
17.2 Features
Features of the SPI module include:
17.3 Pin Name Conventions
The text that follows describes the SPI. The SPI I/O pin names are SS (slave select), SPSCK (SPI serial
clock), CGND (clock ground), MOSI (master out slave in), and MISO (master in/slave out). The SPI
shares four I/O pins with four parallel I/O ports.
The full names of the SPI I/O pins are shown in
follows.
Freescale Semiconductor
•
•
•
•
•
•
•
•
•
•
•
•
Full-duplex operation
Master and slave modes
Double-buffered operation with separate transmit and receive registers
Four master mode frequencies (maximum = bus frequency ÷ 2)
Maximum slave mode frequency = bus frequency
Serial clock with programmable polarity and phase
Two separately enabled interrupts:
–
–
Mode fault error flag with CPU interrupt capability
Overflow error flag with CPU interrupt capability
Programmable wired-OR mode
I
I/O (input/output) port bit(s) software configurable with pullup device(s) if configured as input port
bit(s)
2
C (inter-integrated circuit) compatibility
SPRF (SPI receiver full)
SPTE (SPI transmitter empty)
Pin Names:
Full SPI
SPI Generic
Pin Names:
SPI
MC68HC908GZ16 • MC68HC908GZ8 Data Sheet, Rev. 4
PTD1/MISO
Table 17-1. Pin Name Conventions
MISO
PTD2/MOSI
Table
MOSI
17-1. The generic pin names appear in the text that
PTD0/SS
SS
PTD3/SPSCK
SPSCK
CGND
V
SS
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