To COMPy A or B input
To ADC Channel X
1
0
AIOx Pin
AIOxIN
AIOxINE
SYNC
SYSCLK
Logic implemented in GPIO MUX block
AIODAT Reg
(Read)
AIODAT Reg
(Latch)
AIOSET,
AIOCLEAR,
AIOTOGGLE
Regs
AIOMUX 1 Reg
1
0
AIOxDIR
(1 = Input,
0 = Output)
(0 = Input, 1 = Output)
AIODIR Reg
(Latch)
0
93
TMS320F28069, TMS320F28068, TMS320F28067, TMS320F28066
TMS320F28065, TMS320F28064, TMS320F28063, TMS320F28062
www.ti.com
SPRS698F – NOVEMBER 2010 – REVISED MARCH 2016
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TMS320F28069 TMS320F28068 TMS320F28067 TMS320F28066 TMS320F28065
TMS320F28064 TMS320F28063 TMS320F28062
Detailed Description
Copyright © 2010–2016, Texas Instruments Incorporated
6.9.2.2
ADC MUX
Figure 6-29. AIOx Pin Multiplexing
The ADC channel and Comparator functions are always available. The digital I/O function is available only
when the respective bit in the AIOMUX1 register is 0. In this mode, reading the AIODAT register reflects
the actual pin state.
The digital I/O function is disabled when the respective bit in the AIOMUX1 register is 1. In this mode,
reading the AIODAT register reflects the output latch of the AIODAT register and the input digital I/O buffer
is disabled to prevent analog signals from generating noise.
On reset, the digital function is disabled. If the pin is used as an analog input, users should keep the AIO
function disabled for that pin.
