MC68HC08AS32 Datasheet, PDF (203/280 Pages) Motorola, Inc – M68HC08 Family of 8-bit microcontroller units (MCUs)

14.3 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 14-1 shows the full names of the
SPI I/O pins. The generic pin names appear in the text that follows.
Table 14-1. Pin Name Conventions
SPI Generic Pin Name:
MISO
Full SPI Pin Name: PTE5/MISO
MOSI
PTE6/MOSI
SS
PTE4/SS
SPSCK
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 14-2 shows the names and the addresses of the SPI I/O registers.
Table 14-2. I/O Register Addresses
Register Name
SPI control register
SPI status and control register
SPI data register
Address
$0010
$0011
$0012
MC68HC08AS32 — Rev. 4.1
Freescale Semiconductor
Data Sheet
203