LM3S600 Bookham Technology, Inc., LM3S600 Datasheet - Page 136

• Manufacturer Part Number: LM3S600
• Description: Microcontroller
• Manufacturer: Bookham Technology, Inc.

General-Purpose Input/Outputs (GPIOs)
136
Bit/Field
7:0
AFSEL
Name
Type
R/W
Reset
-
Preliminary
Description
GPIO Alternate Function Select
The AFSEL values are defined as follows:
Value
0
1
Description
Software control of corresponding GPIO line (GPIO mode).
Hardware control of corresponding GPIO line (alternate
hardware function).
Note:
The default reset value for the GPIOAFSEL register
is 0x0000.0000 for all GPIO pins, with the exception
of the five JTAG pins (PB7 and PC[3:0]). These five
pins default to JTAG functionality. Because of this,
the default reset value of GPIOAFSEL for GPIO Port
B is 0x0000.0080 while the default reset value for
Port C is 0x0000.000F.
October 01, 2007