mc68hc908as60 Freescale Semiconductor, Inc, mc68hc908as60 Datasheet - Page 311

• Manufacturer Part Number: mc68hc908as60
• Description: Mc68hc908as60 Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

20.6 Port D
20.6.1 Port D Data Register
MC68HC908AS60 — Rev. 1.0
NOTE:
Functions:
Address:
Alternate
Port D is an 8-bit general-purpose I/O port.
The pin associated with PTD7 is available only in the 64-pin QFP.
Port D is an 8-bit special function port that shares all of its pins with the
analog-to-digital converter and one of its pins with the timer interface
module A (TIMA).
PTD[7:0] — Port D Data Bits
ATD[14:8] — ADC Channel Status Bits
Reset:
Read:
Write:
PTD[7:0] are read/write, software programmable bits. Data direction
of PTD[7:0] pins are under the control of the corresponding bit in data
direction register D.
PTD6/TACLK–PTD0 are seven of the 15 analog-to-digital converter
channels. The ADC channel select bits, CH[4:0], determine whether
the PTD6/TACLK–PTD0 pins are ADC channels or general-purpose
I/O pins. If an ADC channel is selected and a read of this
corresponding bit in the port B data register occurs, the data will be 0
if the data direction for this bit is programmed as an input. Otherwise,
the data will reflect the value in the data latch. See
Analog-to-Digital Converter
Freescale Semiconductor, Inc.
For More Information On This Product,
$0003
PTD7
Bit 7
R
R
Go to: www.freescale.com
Figure 20-11. Port D Data Register (PTD)
Input/Output (I/O) Ports
= Reserved
ATD14/
TACLK
PTD6
6
ATD13
PTD5
5
Unaffected by reset
ATD12
PTD4
(ADC-15).
4
ATD11
PTD3
3
ATD10
PTD2
2
Input/Output (I/O) Ports
Section 23.
PTD1
ATD9
1
Technical Data
PTD0
ATD8
Bit 0
Port D