MC9S12E32CFU FREESCALE [Freescale Semiconductor, Inc], MC9S12E32CFU Datasheet - Page 129

• Manufacturer Part Number: MC9S12E32CFU
• Description: HCS12 Microcontrollers
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

Refer to the ATD block description chapter for information on the ATDDIEN0 and ATDDIEN1 registers.
During reset, port AD pins are configured as high-impedance analog inputs (digital input buffer is
disabled).
3.3.1.1
Read: Anytime. Write: Anytime.
If the data direction bit of the associated I/O pin (DDRADx) is set to 1 (output), a write to the
corresponding I/O Register bit sets the value to be driven to the Port AD pin. If the data direction bit of the
associated I/O pin (DDRADx) is set to 0 (input), a write to the corresponding I/O Register bit takes place
but has no effect on the Port AD pin.
If the associated data direction bit (DDRADx) is set to 1 (output), a read returns the value of the I/O register
bit.
If the associated data direction bit (DDRADx) is set to 0 (input) and the associated ATDDIEN0(1) bit is
set to 0 (digital input buffer is disabled), the associated I/O register bit (PTADx) reads “1”.
If the associated data direction bit (DDRADx) is set to 0 (input) and the associated ATDDIEN0(1) bit is
set to 1 (digital input buffer is enabled), a read returns the value of the pin.
Freescale Semiconductor
KWU:
Reset
KWU:
Reset
ATD:
ATD:
W
W
R
R
KWAD15
PTAD15
KWAD7
PTAD7
AN15
AN7
Port AD I/O Register (PTAD)
0
0
7
7
KWAD14
PTAD14
KWAD6
PTAD6
AN14
AN6
0
0
6
6
Figure 3-2. Port AD I/O Register (PTAD)
KWAD13
PTAD13
KWAD5
PTAD5
AN13
AN5
MC9S12E128 Data Sheet, Rev. 1.07
0
0
5
5
PTAD12
KWAD4
KWA12
PTAD4
AN12
AN4
0
0
4
4
KWAD11
PTAD11
KWAD3
PTAD3
AN11
AN3
3
0
3
0
Chapter 3 Port Integration Module (PIM9E128V1)
KWAD10
PTAD10
KWAD2
PTAD2
AN10
AN2
0
0
2
2
KWAD9
KWAD1
PTAD9
PTAD1
AN9
AN1
1
0
1
0
KWAD8
KWAD0
PTAD8
PTAD0
AN8
AN0
0
0
0
0
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