MC812A4CPVE8 Freescale Semiconductor, MC812A4CPVE8 Datasheet - Page 105

• 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

10.5 Registers and Reset Initialization
This section describes the registers and reset initialization.
10.5.1 Real-Time Interrupt Control Register
Read: Anytime
Write: Varies from bit to bit
Freescale Semiconductor
PCLK
÷ 2
÷ 2
÷ 2
÷ 2
÷ 2
÷ 2
÷ 2
PRS[4:0]
REGISTER: SP0BR
SPR2:SPR1:SPR0
Address: $0014
BITS:
0:0:0
0:0:1
0:1:0
0:1:1
1:0:0
1:0:1
1:1:0
1:1:1
PRESCALER
Reset:
Read:
Write:
5-BIT ATD
Figure 10-7. Real-Time Interrupt Control Register (RTICTL)
RTIE
Bit 7
0
Figure 10-6. Clock Chain for SPI, ATD, and BDM
SPI BIT RATE
SYNCHRONIZER
= Unimplemented
BKGD PIN
÷ 2
RSWAI
LOGIC
6
0
MC68HC812A4 Data Sheet, Rev. 7
ATD CLOCK
RSBCK
5
0
DIRECTION
BKGD OUT
BKGD
BKGD IN
ECLK
4
0
0
BDM BIT CLOCK
Receive: Detect falling edge; count 12 E-clocks; sample input
Transmit 1: Detect falling edge; count six E-clocks while output is
high impedance; drive out one E cycle pulse high; return output
to high impedance
Transmit 0: Detect falling edge; drive out low; count nine E-clocks;
drive out one E cycle pulse high; return output to high-impedance
RTBYP
3
0
RTR2
2
0
Registers and Reset Initialization
RTR1
1
0
RTR0
Bit 0
0
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