MC908SR12MFAE Freescale Semiconductor, MC908SR12MFAE Datasheet - Page 329

• Manufacturer Part Number: MC908SR12MFAE
• Description: IC MCU 12K FLASH 8MHZ 48-LQFP
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MC908SR12MFAE

• Core Processor: HC08
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: I²C, SCI
• Peripherals: LVD, POR, PWM, Temp Sensor
• Number Of I /o: 31
• Program Memory Size: 12KB (12K x 8)
• Program Memory Type: FLASH
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 14x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 48-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

18.5.2 Data Direction Register C (DDRC)
MC68HC908SR12•MC68HC08SR12 — Rev. 5.0
Freescale Semiconductor
NOTE:
NOTE:
Address:
Data direction register C determines whether each port C pin is an input
or an output. Writing a logic 1 to a DDRC bit enables the output buffer for
the corresponding port C pin; a logic 0 disables the output buffer.
DDRC[7:0] — Data Direction Register C Bits
Avoid glitches on port C pins by writing to the port C data register before
changing data direction register C bits from 0 to 1.
the port C I/O logic.
For those devices packaged in a 42-pin shrink dual in-line package,
PTC6 and PTC7 are not connected. DDRC6 and DDRC7 should be set
to a 1 to configure PTC6 and PTC7 as outputs.
Reset:
Read:
Write:
These read/write bits control port C data direction. Reset clears
DDRC[7:0], configuring all port C pins as inputs.
1 = Corresponding port C pin configured as output
0 = Corresponding port C pin configured as input
DDRC7
READ DDRC ($0006)
WRITE DDRC ($0006)
WRITE PTC ($0002)
READ PTC ($0002)
$0006
Bit 7
Figure 18-10. Data Direction Register B (DDRB)
0
Input/Output (I/O) Ports
DDRC6
6
0
Figure 18-11. Port C I/O Circuit
RESET
DDRC5
5
0
DDRC4
DDRCx
PTCx
4
0
DDRC3
3
0
DDRC2
Figure 18-11
2
0
Input/Output (I/O) Ports
DDRC1
1
0
Data Sheet
shows
DDRC0
Bit 0
Port C
0
PTCx
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