MC68HC908GP32CP Freescale Semiconductor, MC68HC908GP32CP Datasheet - Page 222

• Manufacturer Part Number: MC68HC908GP32CP
• Description: IC MCU 8MHZ 32K FLASH 40-DIP
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MC68HC908GP32CP

• 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: 40-DIP (0.600", 15.24mm)
• 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
16.4.2 Data Direction Register B
Technical Data
220
NOTE:
Address:
Data direction register B (DDRB) determines whether each port B pin is
an input or an output. Writing a logic 1 to a DDRB bit enables the output
buffer for the corresponding port B pin; a logic 0 disables the output
buffer.
DDRB7–DDRB0 — Data Direction Register B Bits
Avoid glitches on port B pins by writing to the port B data register before
changing data direction register B bits from 0 to 1.
Figure 16-8
Reset:
Read:
Write:
These read/write bits control port B data direction. Reset clears
DDRB7–DDRB0], configuring all port B pins as inputs.
1 = Corresponding port B pin configured as output
0 = Corresponding port B pin configured as input
DDRB7
READ DDRB ($0005)
WRITE DDRB ($0005)
WRITE PTB ($0001)
READ PTB ($0001)
$0005
Bit 7
0
Figure 16-7. Data Direction Register B (DDRB)
shows the port B I/O logic.
Input/Output (I/O) Ports
DDRB6
6
0
Figure 16-8. Port B I/O Circuit
RESET
DDRB5
5
0
DDRB4
MC68HC908GP32
DDRBx
PTBx
4
0
DDRB3
3
0
DDRB2
•
MC68HC08GP32
2
0
DDRB1
1
0
MOTOROLA
—
DDRB0
Bit 0
Rev. 6
0
PTBx