MC812A4CPVE8 Freescale Semiconductor, MC812A4CPVE8 Datasheet - Page 72

• 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)
6.3.13 Reduced Drive Register
Read: Anytime, if register is in the map
Write: Anytime, in normal modes; never in special modes
This register is not in the map in peripheral mode.
These bits select reduced drive for the associated port pins. This gives reduced power consumption and
reduced RFI with a slight increase in transition time (depending on loading). The reduced drive function
is independent of which function is being used on a particular port.
RDPJ — Reduced Drive of Port J Bit
RDPH — Reduced Drive of Port H Bit
RDPG — Reduced Drive of Port G Bit
RDPF — Reduced Drive of Port F Bit
RDPE — Reduced Drive of Port E Bit
RDPD — Reduced Drive of Port D Bit
RDPC — Reduced Drive of Port C Bit
RDPAB — Reduced Drive of Port A and Port B Bit
72
1 = Reduced drive for all port J output pins
0 = Full drive for all port J output pins
1 = Reduced drive for all port H output pins
0 = Full drive for all port H output pins
1 = Reduced drive for all port G output pins
0 = Full drive for all port G output pins
1 = Reduced drive for all port F output pins
0 = Full drive for all port F output pins
1 = Reduced drive for all port E output pins
0 = Full drive for all port E output pins
1 = Reduced drive for all port D output pins
0 = Full drive for all port D output pins
1 = Reduced drive for all port C output pins
0 = Full drive for all port C output pins
1 = Reduced drive for all port A and port B output pins
0 = Full drive for all port A and port B output pins
Address: $000D
Reset:
Read:
Write:
Bit 7
RDPJ
0
Figure 6-13. Reduced Drive Register (RDRIV)
6
RDPH
0
MC68HC812A4 Data Sheet, Rev. 7
5
RDPG
0
4
RDPF
0
3
RDPE
0
2
PRPD
0
1
RDPC
0
Freescale Semiconductor
Bit 0
RDPAB
0