mc9s12e256 Freescale Semiconductor, Inc, mc9s12e256 Datasheet - Page 229

• Manufacturer Part Number: mc9s12e256
• Description: Hcs12 Microcontrollers 16-bit Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

6.3.2.15
The data port associated with the ATD is input-only. The port pins are shared with the analog A/D inputs
AN7-0.
Read: Anytime
Write: Anytime, no effect
The A/D input channels may be used for general-purpose digital input.
Freescale Semiconductor
Function
PTAD[7:8]
Reset
Field
Pin
7:0
W
R
PTAD7
AN 7
Port Data Register 1 (PORTAD1)
1
7
A/D Channel x (ANx) Digital Input Bits — If the digital input buffer on the ANx pin is enabled (IENx=1) or
channel x is enabled as external trigger (ETRIGE = 1, ETRIGCH[3-0] = x, ETRIGSEL = 0) read returns the
logic level on ANx pin (signal potentials not meeting V
If the digital input buffers are disabled (IENx = 0) and channel x is not enabled as external trigger, read returns
a “1”.
Reset sets all PORTAD1 bits to “1”.
= Unimplemented or Reserved
PTAD6
AN6
1
6
Figure 6-17. Port Data Register 1 (PORTAD1)
Table 6-26. PORTAD1 Field Descriptions
PTAD5
AN5
MC9S12E256 Data Sheet, Rev. 1.08
1
5
PTAD4
AN4
1
4
Description
IL
or V
PTAD3
AN3
Chapter 6 Analog-to-Digital Converter (ATD10B16CV4)
3
1
IH
specifications will have an indeterminate value)).
PTAD2
AN2
1
2
PTAD1
AN1
1
1
PTAD0
AN0
1
0
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