MC68HC908MR8CP Freescale Semiconductor, MC68HC908MR8CP Datasheet - Page 282

• Manufacturer Part Number: MC68HC908MR8CP
• Description: IC MCU 8K FLASH 8MHZ PWM 28-DIP
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MC68HC908MR8CP

• Core Processor: HC08
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: SCI
• Peripherals: LVD, POR, PWM
• Number Of I /o: 12
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 4x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 28-DIP (0.600", 15.24mm)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

Input/Output (I/O) Ports
14.3.2 Data Direction Register A
Technical Data
282
NOTE:
Data direction register A (DDRA) determines whether each port A pin is
an input or an output. Writing a logic 1 to a DDRA bit enables the output
buffer for the corresponding port A pin; a logic 0 disables the output
buffer.
Reset:
DDRA[6:0] — Data Direction Register A Bits
Avoid glitches on port A pins by writing to the port A data register before
changing data direction register A bits from 0 to 1.
Figure 14-4
dress:
Read:
Write:
Ad-
These read/write bits control port A data direction. Reset clears
DDRA[6:0], configuring all port A pins as inputs.
1 = Corresponding port A pin configured as output
0 = Corresponding port A pin configured as input
$0004
Bit 7
0
Figure 14-3. Data Direction Register A (DDRA)
shows the port A I/O logic.
Input/Output (I/O) Ports
= Unimplemented
DDRA6 DDRA5 DDRA4 DDRA3 DDRA2 DDRA1 DDRA0
6
0
5
0
4
0
3
0
MC68HC908MR8 — Rev 4.1
Freescale Semiconductor
2
0
1
0
Bit 0
0