XC908AS60ACFU Motorola Semiconductor Products, XC908AS60ACFU Datasheet - Page 363

• Manufacturer Part Number: XC908AS60ACFU
• Description: MC68HC908AZ60A, MC68HC908AS60A Hcmos Microcontroller Unit Technical Data
• Manufacturer: Motorola Semiconductor Products

22.6 Port D
22.6.1 Port D Data Register
MC68HC908AZ60A — Rev 2.0
MOTOROLA
Functions:
Alternate
Address:
Port D is an 8-bit general-purpose I/O port. Note that PTD7 is only
available on 64-pin package options.
Port D is a 8-bit special function port that shares seven of its pins with
the analog to digital converter and two with the timer interface
modules.
PTD[7:0] — Port D Data Bits
ATD[14:8] — ADC Channel Status Bits
PTD6/ATD14/TACLK–PTD0/ATD8 are seven of the 15 analog-to-
digital converter channels. The ADC channel select bits, CH[4:0],
determine whether the PTD6/ATD14/TACLK–PTD0/ATD8 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
Data direction register D (DDRD) does not affect the data direction of
port D pins that are being used by the TIMA or TIMB. However, the
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.
$0003
PTD7
Bit 7
R
Figure 22-11. Port D Data Register (PTD)
ATD14/
TACLK
Input/Output Ports
PTD6
6
Analog-to-Digital Converter (ADC)
ATD13
PTD5
5
Unaffected by Reset
ATD12/
TBCLK
PTD4
4
ATD11
PTD3
3
ATD10
PTD2
2
Input/Output Ports
PTD1
ATD9
on page 471).
1
Technical Data
PTD0
ATD8
Bit 0
Port D
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