MC9S12XDP512CFU
Model | MC9S12XDP512CFU |
Description | 16-BIT, FLASH, 40MHz, MICROCONTROLLER, PQFP80 |
PDF file | Total 1348 pages (File size: 8M) |
Chip Manufacturer | PHILIPS |
Chapter 4 Analog-to-Digital Converter (ATD10B16CV4) Block Description
4.3.2.15
Port Data Register 1 (PORTAD1)
The data port associated with the ATD is input-only. The port pins are shared with the analog A/D inputs
AN7-0.
7
6
5
4
3
2
1
0
R
W
Reset
Pin
Function
PTAD7
PTAD6
PTAD5
PTAD4
PTAD3
PTAD2
PTAD1
PTAD0
1
AN 7
1
AN6
1
AN5
1
AN4
1
AN3
1
AN2
1
AN1
1
AN0
= Unimplemented or Reserved
Figure 4-17. Port Data Register 1 (PORTAD1)
Read: Anytime
Write: Anytime, no effect
The A/D input channels may be used for general-purpose digital input.
Table 4-26. PORTAD1 Field Descriptions
Field
7:0
PTAD[7:8]
Description
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
IL
or V
IH
specifications will have an indeterminate value)).
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”.
MC9S12XDP512 Data Sheet, Rev. 2.21
150
Freescale Semiconductor