MC812A4CPVE8 Freescale Semiconductor, MC812A4CPVE8 Datasheet - Page 66

• Manufacturer Part Number: MC812A4CPVE8
• Description: IC MCU 16BIT EEPROM 4K 112-LQFP
• Manufacturer: Freescale Semiconductor
• Series: HC12r

Specifications of MC812A4CPVE8

• Core Processor: CPU12
• Core Size: 16-Bit
• Speed: 8MHz
• Connectivity: SCI, SPI
• Peripherals: POR, WDT
• Number Of I /o: 83
• Program Memory Size: 4KB (4K x 8)
• Program Memory Type: EEPROM
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 8x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 112-LQFP
• Processor Series: HC812A
• Core: HC12
• Data Bus Width: 16 bit
• Data Ram Size: 1 KB
• Interface Type: SCI, SPI
• Maximum Clock Frequency: 8 MHz
• Number Of Programmable I/os: 91
• Number Of Timers: 8
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 8 bit, 8 Channel
• Controller Family/series: 68HC12
• No. Of I/o's: 91
• Eeprom Memory Size: 4KB
• Ram Memory Size: 1KB
• Cpu Speed: 8MHz
• No. Of Timers: 1
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details

Bus Control and Input/Output (I/O)
6.3.5 Port C Data Register
Read: Anytime, if register is in the map
Write: Anytime, if register is in the map
Bits PC7–PC0 correspond to data lines DATA15–DATA8. When this port is not used for external data
such as in single-chip mode, these pins can be used as general-purpose I/O. DDRC determines the
primary direction for each pin. In narrow expanded modes, DATA15–DATA8 and DATA7–DATA0 are
multiplexed into the MCU through port C pins on successive cycles. This register is not in the on-chip map
in expanded and peripheral modes.
When the MCU is operating in special expanded narrow mode and port C and port D are being used for
internal visibility, internal accesses produce full 16-bit information with DATA15–DATA8 on port C and
DATA7–DATA0 on port D. This allows the MCU to operate at full speed while making 16-bit access
information available to external development equipment in a single cycle. In this narrow mode, normal
16-bit accesses to external memory get split into two successive 8-bit accesses on port C alone.
6.3.6 Port C Data Direction Register
Read: Anytime, if register is in the map
Write: Anytime, if register is in the map
DDRC is not in the on-chip map in expanded and peripheral modes.
This register determines the primary direction for each port C pin when functioning as a general-purpose
I/O port.
66
Expanded wide and peripheral:
1 = Associated pin is an output.
0 = Associated pin is a high-impedance input.
Address: $0006
Expanded narrow: DATA15/7 DATA14/6 DATA13/5 DATA12/4 DATA11/3 DATA10/2
Reset:
Read:
Write:
Address: $0004
DDRC7
Reset:
Read:
Write:
Bit 7
0
Figure 6-6. Port C Data Direction Register (DDRC)
DATA15
Figure 6-5. Port C Data Register (PORTC)
Bit 7
PC7
DDRC6
0
6
0
MC68HC812A4 Data Sheet, Rev. 7
DATA14
PC6
DDRC5
6
0
5
0
DATA13
PC5
DDRC4
5
0
4
0
DATA12
PC4
DDRC3
4
0
3
0
DATA11
PC3
DDRC2
3
0
2
0
DATA10
PC2
DDRC1
2
0
1
0
DATA9/1
DATA9
Freescale Semiconductor
PC1
DDRC0
1
0
Bit 0
0
DATA8/0
DATA8
Bit 0
PC0
0