MC68HC912B32CFU8 Freescale Semiconductor, MC68HC912B32CFU8 Datasheet - Page 297

• Manufacturer Part Number: MC68HC912B32CFU8
• Description: IC MCU 32K FLASH 8MHZ 80-QFP
• Manufacturer: Freescale Semiconductor
• Series: HC12r

Specifications of MC68HC912B32CFU8

• Core Processor: CPU12
• Core Size: 16-Bit
• Speed: 8MHz
• Connectivity: SCI, SPI
• Peripherals: POR, PWM, WDT
• Number Of I /o: 63
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 768 x 8
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 80-QFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

18.3.5.2 Firmware Command
The bits in the BDM instruction register have these meanings when a firmware command is executed.
H/F — Hardware/Firmware Flag
DATA — Data Flag
R/W — Read/Write Flag
TTAGO — Trace, Tag, Go Field
REGN — Register/Next Field
Freescale Semiconductor
Indicates which register is being affected by a command. In the case of a READ_NEXT or
WRITE_NEXT command, index register X is pre-incremented by two and the word pointed to by X is
then read or written.
0 = Firmware control logic
1 = Hardware control logic
0 = No data
1 = Data included in command
0 = Write
1 = Read
Address: $FF00
Reset:
Read:
Write:
Figure 18-5. BDM Instruction Register (INSTRUCTION)
Bit 7
H/F
0
TTAGO Value
TTAGO Value
DATA
6
0
M68HC12B Family Data Sheet, Rev. 9.1
000
001
010
011
00
01
10
11
Table 18-5. TTAGO Decoding
Table 18-6. REGN Decoding
R/W
5
0
4
0
TTAGO
READ/WRITE NEXT
3
0
Instruction
Instruction
TRACE1
TAGGO
GO
PC
—
—
—
2
0
Background Debug Mode (BDM)
REGN
1
0
Bit 0
0
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