MC68HC908JB8JPE Freescale Semiconductor, MC68HC908JB8JPE Datasheet - Page 211

• Manufacturer Part Number: MC68HC908JB8JPE
• Description: IC MCU FLASH 8BIT 8K 20-DIP
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MC68HC908JB8JPE

• Core Processor: HC08
• Core Size: 8-Bit
• Speed: 3MHz
• Connectivity: USB
• Peripherals: LVD, POR, PWM
• Number Of I /o: 13
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 20-DIP (0.300", 7.62mm)
• Controller Family/series: HC08
• No. Of I/o's: 13
• Ram Memory Size: 256Byte
• Cpu Speed: 3MHz
• No. Of Timers: 1
• Embedded Interface Type: USB
• Rohs Compliant: Yes
• Processor Series: HC08JB
• Core: HC08
• Data Bus Width: 8 bit
• Data Ram Size: 256 B
• Interface Type: USB
• Maximum Clock Frequency: 3 MHz
• Number Of Programmable I/os: 37
• Number Of Timers: 2
• Operating Supply Voltage: 4 V to 5.5 V
• Maximum Operating Temperature: + 70 C
• Mounting Style: Through Hole
• Development Tools By Supplier: FSICEBASE, DEMO908GZ60E, M68EML08GZE, KITUSBSPIDGLEVME, KITUSBSPIEVME, KIT33810EKEVME
• Minimum Operating Temperature: 0 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -
• Lead Free Status / Rohs Status: Details

12.6.2 Data Direction Register D
MC68HC908JB8•MC68HC08JB8•MC68HC08JT8 — Rev. 2.3
Freescale Semiconductor
NOTE:
NOTE:
Address:
Data direction register D 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.
DDRD[7:0] — 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.
For those devices packaged in a 20-pin PDIP and 20-pin SOIC package,
PTD7–PTD2 are not connected. DDRD7–DDRD2 should be set to a 1 to
configure PTD7–PTD2 as outputs.
For those devices packaged in a 28-pin SOIC package, PTD7 is not
connected. DDRD7 should be set to a 1 to configure PTD7 as output.
Figure 12-13
Reset:
Read:
Write:
These read/write bits control port D data direction. Reset clears
DDRD[7:0], configuring all port D pins as inputs.
Port D pins are open-drain when configured as output.
1 = Corresponding port D pin configured as output
0 = Corresponding port D pin configured as input
DDRD7
$0007
Bit 7
Figure 12-12. Data Direction Register D (DDRD)
0
shows the port D I/O circuit logic.
Input/Output Ports (I/O)
DDRD6
6
0
DDRD5
0
5
DDRD4
0
4
DDRD3
3
0
DDRD2
2
0
Input/Output Ports (I/O)
DDRD1
1
0
Technical Data
DDRD0
Bit 0
Port D
0
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