MC812A4CPVE8 Freescale Semiconductor, MC812A4CPVE8 Datasheet - Page 60

• 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

Operating Modes and Resource Mapping
5.4.3 RAM Initialization Register
After reset, addresses of the 1-Kbyte RAM array begin at location $0800 but can be assigned to any
2-Kbyte boundary within the standard 64-Kbyte address space. Mapping of internal RAM is controlled by
five bits in the INITRM register. The RAM array occupies the last 1 Kbyte of the 2-Kbyte block.
Read: Anytime
Write: Once in normal modes; anytime in special modes
RAM15–RAM11 — RAM Position Bits
5.4.4 EEPROM Initialization Register
The MCU has 4 Kbytes of EEPROM which is activated by the EEON bit in the INITEE register.
Mapping of internal EEPROM is controlled by four bits in the INITEE register. After reset, EEPROM
address space begins at location $1000 but can be mapped to any 4-Kbyte boundary within the standard
64-Kbyte address space.
Read: Anytime
Write: Varies from bit to bit
EE15–EE12 — EEPROM Position Bits
EEON — EEPROM On Bit
60
These bits specify the upper five bits of the 16-bit RAM address.
These bits specify the upper four bits of the 16-bit EEPROM address.
Normal modes: Write once
Special modes: Write anytime
EEON enables the on-chip EEPROM. EEON is forced to 1 in single-chip modes.
Write anytime
1 = EEPROM at address selected by EE15–EE12
0 = EEPROM removed from memory map
Expanded and peripheral:
Address: $0010
Reset:
Read:
Write:
Single-chip:
Address: $0012
Reset:
Read:
Write:
RAM15
Bit 7
Figure 5-4. EEPROM Initialization Register (INITEE)
0
Figure 5-3. RAM Initialization Register (INITRM)
EE15
Bit 7
0
1
RAM14
6
0
EE14
MC68HC812A4 Data Sheet, Rev. 7
6
0
1
RAM13
5
0
EE13
5
0
1
RAM12
4
0
EE12
4
1
1
RAM11
3
1
3
0
0
0
2
0
0
2
0
0
0
1
0
0
Freescale Semiconductor
1
0
0
0
Bit 0
0
0
EEON
Bit 0
1
1