MC68HC908GP32CFB Freescale Semiconductor, MC68HC908GP32CFB Datasheet - Page 230

• Manufacturer Part Number: MC68HC908GP32CFB
• Description: IC MCU 8MHZ 32K FLASH 44-QFP
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MC68HC908GP32CFB

• Core Processor: HC08
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: SCI, SPI
• Peripherals: LVD, POR, PWM
• Number Of I /o: 33
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 8x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-QFP
• For Use With: M68EVB908GP32 - BOARD EVALUATION FOR HC908GP32
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

Input/Output (I/O) Ports
16.6.2 Data Direction Register D
Technical Data
228
NOTE:
NOTE:
Address:
Data direction register D (DDRD) determines whether each port D pin is
an input or an output. Writing a logic 1 to a DDRD bit enables the output
buffer for the corresponding port D pin; a logic 0 disables the output
buffer.
DDRD7–DDRD0 — Data Direction Register D Bits
Avoid glitches on port D pins by writing to the port D data register before
changing data direction register D bits from 0 to 1.
Figure 16-15
For those devices packaged in a 40-pin dual in-line package, PTD6 and
PTD7 are not connected. DDRD6 and DDRD7 should be set to a 1 to
configure PTD6 and PTD7 as outputs.
Reset:
Read:
Write:
These read/write bits control port D data direction. Reset clears
DDRD7–DDRD0, configuring all port D pins as inputs.
1 = Corresponding port D pin configured as output
0 = Corresponding port D pin configured as input
DDRD7
$0007
Bit 7
Figure 16-14. Data Direction Register D (DDRD)
0
shows the port D I/O logic.
Input/Output (I/O) Ports
DDRD6
6
0
DDRD5
5
0
DDRD4
MC68HC908GP32
4
0
DDRD3
3
0
DDRD2
•
MC68HC08GP32
2
0
DDRD1
1
0
MOTOROLA
—
DDRD0
Bit 0
Rev. 6
0