MC68HC912B32CFU8 Freescale Semiconductor, MC68HC912B32CFU8 Datasheet - Page 305

• 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

Table 18-10
pin does not affect the function of the other. The presence of logic level 0 on either pin at the fall of ECLK
performs the indicated function. Tagging is allowed in all modes. Tagging is disabled when BDM becomes
active and BDM serial commands are not processed while tagging is active.
The tag follows the information in the queue as the queue is advanced. When a tagged instruction
reaches the head of the queue, the CPU enters active background debug mode rather than executing the
instruction. This is the mechanism by which a development system initiates hardware breakpoints.
Currently, the tool configuration shown in
Freescale Semiconductor
shows the functions of the two tagging pins. The pins operate independently; the state of one
TAGHI
1
1
0
0
Figure 18-16. BDM Tool Connector
M68HC12B Family Data Sheet, Rev. 9.1
Table 18-10. Tag Pin Function
Figure 18-16
BKGD
TAGLO
V
NC
FP
1
0
1
0
1
3
5
is used.
2
4
6
GND
RESET
V
DD
Both bytes
High byte
Low byte
No tag
Tag
Instruction Tagging
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