MC68HC708MP16CFU Cgnd (clock Ground) - Freescale Semiconductor, Inc

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MC68HC708MP16CFU

Manufacturer Part Number
MC68HC708MP16CFU
Description
Manufacturer
Freescale Semiconductor, Inc
Datasheet
Serial Peripheral Interface Module (SPI)
SPE
0
1
1
1
1. X = don’t care
13.13.5 CGND (Clock Ground)
CGND is the ground return for the serial clock pin, SPSCK, and the
ground for the port output buffers. To reduce the ground return path loop
and minimize radio frequency (RF) emissions, connect the ground pin of
the slave to the CGND pin of the master.
13.14 I/O Registers
Three registers control and monitor SPI operation:
Technical Data
276
Table 13-3. SPI Configuration
SPMSTR
MODFEN
SPI Configuration
(1)
X
X
Not Enabled
0
X
1
0
Master without MODF
1
1
Master with MODF
SPI control register (SPCR)
SPI status and control register (SPSCR)
SPI data register (SPDR)
Serial Peripheral Interface Module (SPI)
State of SS Logic
General-purpose I/O;
SS ignored by SPI
Slave
Input-only to SPI
General-purpose I/O;
SS ignored by SPI
Input-only to SPI
MC68HC708MP16
Rev. 3.1
Freescale Semiconductor

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