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Chapter 2
2.4 Ravin-M Pin Functions
2.4.1 Ravin-M pin multiplexing control
Figure 2-2
2.4.1.1
36
The pins of Ravin-M are gathered in three different groups:
•
Non-mux I/O signals
These signals are connected directly to external pins. Such pins carry
always the same signal, independent of any pinout configuration.
Non-SMUX I/O signals
•
These signals are passed through a pin multiplexer, that is controlled
by the register bits SYSPINMUX.PINMUX[3:0]. By these bits a set of
signal groups are made available at the external pins.
•
SMUX I/O signals
These signals are also passed through the pin multiplexer like the
non-SMUX signals and are also controlled by the register bits
SYSPINMUX.PINMUX[3:0] in signal groups, but single signals of the
selected signal groups can be replaced by other SMUX signals via
dedicated separate multiplexers. The separate multiplexers are
controlled by the register bits SYSPINMUX.SMUXm, whereas m
stands for the concerned pin number.
The following figure show the multiplexer configuration.
System
Controller
MODE[3:0]
Ravin-M
Core
Pin multiplexing control
PINMUX[3:0] pin multiplexer control
The value of SYSPINMUX.PINMUX[3:0] bits in the System Controller are derived
from the bits SYSBOOTMODE.BOOTMODE[3:0], which in turn hold the settings
Preliminary User's Manual S19203EE1V3UM00
SYSPINMUX.SMUXi
. .
. .
.
.
SYSPINMUX.SMUXk
SYSPINMUX.PINMUX[3:0]
Pin Functions
1
pin k
0
. .
. .
. .
.
.
.
1
pin i
0
. .
. .
.
.
. .
.
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