Texas Instruments AM335 Series

HHV (VDDA
Domain)
VDDA
VREFP
VREFN
INTREF
(no internal
connection)
XPUL
AN0
AN1
AN2
AN3
AN4
AN5
AN6
AN7
XNUR
YPLL
YNLR
VSSA_ADC
(1)
VDDA_ADC
(1)
VSSA
WPNSW
YNNSW
YPNSW
XNNSW
VREFN
SEL_INM<3:0>
Blue pins are I/O pads
4
SEL_RFM<1:0> REXT_BIAS
(no internal
connection)
VREF
M
2
VSSA
XNUR
YNLR
VREFN
(1)
AMUX
4:1
AMUX
2:1
AMUX
9:1
INM
ADC
INP
12
ADC_IBIAS
Internal
Bias
BIAS_SEL
START
DIFF_CNTRL
PD
CLK
EOC
ADCOUT<11:0>
2
INT_VREFP
AMUX
5:1
VDDA
XPUL
YPLL
VREFP
(1)
INTREF
AMUX
9:1
2
Pen & IRQ
Control
PENIRQ<1:0>
PENCTR<1:0>
4
SEL_RFP<2:0>
SEL_INP<3:0>
YPPSW
XNPSW
XPPSW
Functional Description www.ti.com
Figure 12-2. Functional Block Diagram
(1) In AM335x ARM Cortex-A8 Microprocessors (MPUs) (literature number SPRS717):
• VDDA_ADC and VSSA_ADC are referred to as "Internal References"
• VREFP and VREFN are referred to as "External References"
(2) In AM438x ARM Cortex-A9 Microprocessors (MPUs) (literature number SPRS889):
• VDDA_ADC and VSSA_ADC are referred to as "Internal References"
• VREFP and VREFN are referred to as "External References"
1028
Touchscreen Controller SPRUH73H–October 2011–Revised April 2013
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