MC812A4CPVE8 Freescale Semiconductor, MC812A4CPVE8 Datasheet - Page 219

• 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

17.4.2 BDM Status Register
This register can be read or written by BDM commands or firmware.
ENBDM — Enable BDM Bit (permit active background debug mode)
BDMACT — Background Mode Active Status Bit
ENTAG — Instruction Tagging Enable Bit
SDV — Shifter Data Valid Bit
TRACE — Asserted by the TRACE1 Instruction
17.4.3 BDM Shift Register
This 16-bit register contains data being received or transmitted via the serial interface.
Freescale Semiconductor
Set by the TAGGO instruction and cleared when BDM is entered.
Shows that valid data is in the serial interface shift register. Used by firmware-based instructions.
1 = BDM can be made active to allow firmware commands.
0 = BDM cannot be made active (hardware commands still allowed).
1 = BDM active and waiting for serial commands
0 = BDM not active
1 = Tagging active (BDM cannot process serial commands while tagging is active.)
0 = Tagging not enabled or BDM active
1 = Valid data
0 = No valid data
Single-chip peripheral:
Address: $FF02
Address: $FF03
Reset:
Reset:
Read:
Read:
Write:
Write:
Address: $FF01
Reset:
Read:
Write:
Bit 7
Bit 7
S15
S7
0
0
ENBDM
Bit 7
0
1
Figure 17-6. BDM Status Register (STATUS)
Figure 17-7. BDM Shift Register (SHIFTER)
S14
S6
6
0
6
0
EDMACT
MC68HC812A4 Data Sheet, Rev. 7
6
0
0
S13
S5
5
0
5
0
ENTAG
5
0
0
S12
S4
4
0
4
0
SDV
4
0
0
S11
S3
3
0
3
0
TRACE
3
0
0
S10
S2
2
0
2
0
2
0
0
0
S9
S1
1
0
1
0
1
0
0
0
Bit 0
Bit 0
S8
S0
0
0
Bit 0
BDM Registers
0
0
0
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