MC68HC08AS32 Datasheet, PDF (277/394 Pages) Motorola, Inc – M68HC08 Family of 8-bit microcontroller units (MCUs)

Serial Peripheral Interface (SPI)
Pin Name and Register Name Conventions
18.4 Pin Name and Register Name Conventions
The generic names of the SPI input/output (I/O) pins are:
• SS (slave select)
• SPSCK (SPI serial clock)
• MOSI (master out/slave in)
• MISO (master in/slave out)
The SPI shares four I/O pins with a parallel I/O port. The full name of an
SPI pin reflects the name of the shared port pin. Table 18-1 shows the
full names of the SPI I/O pins. The generic pin names appear in the text
that follows.
Table 18-1. Pin Name Conventions
SPI Generic Pin Name: MISO
MOSI
SS
SPSCK
Full SPI Pin Name:
PTE5/MISO PTE6/MOSI PTE4/SS PTE7/SPSCK
The generic names of the SPI I/O registers are:
• SPI control register (SPCR)
• SPI status and control register (SPSCR)
• SPI data register (SPDR)
Table 18-2 shows the names and the addresses of the SPI I/O registers.
Table 18-2. I/O Register Addresses
Register Name
SPI Control Register
SPI Status and Control Register
SPI Data Register
Address
$0010
$0011
$0012
MC68HC08AS32 — Rev. 3.0
MOTOROLA
Serial Peripheral Interface (SPI)
Advance Information
277