MC68HC912B32CFU8 Freescale Semiconductor, MC68HC912B32CFU8 Datasheet - Page 298
MC68HC912B32CFU8
Manufacturer Part Number
MC68HC912B32CFU8
Description
IC MCU 32K FLASH 8MHZ 80-QFP
Manufacturer
Freescale Semiconductor
Series
HC12r
Datasheet
1.MCHC912B32CFUE8.pdf
(334 pages)
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
Available stocks
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Price
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Part Number:
MC68HC912B32CFU8
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Development Support
18.3.6 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
18.3.7 BDM Shifter Register
The 16-bit SHIFTER register contains data being received or transmitted via the serial interface. It is also
used by the BDM firmware for temporary storage. The register can be read or written in all modes but is
not normally accessed by users.
298
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.
Asserted by the TRACE1 instruction
0 = BDM cannot be made active (hardware commands still allowed).
1 = BDM can be made active to allow firmware commands.
0 = BDM not active
1 = BDM active and waiting for serial commands
0 = Tagging not enabled, or BDM active
1 = Tagging active (BDM cannot process serial commands while tagging is active.)
0 = No valid data
1 = Valid data
Single-Chip Peripheral:
Reset:
Address: $FF02
Address: $FF03
Read:
Write:
Reset:
Read:
Write:
Address: $FF01
Reset:
Read:
Write:
Bit 7
Bit 7
S15
S7
0
0
ENBDM
Bit 7
Figure 18-7. BDM Shifter Register (SHIFTER)
Figure 18-6. BDM Status Register (STATUS)
0
1
S14
S6
6
0
6
0
EDMACT
M68HC12B Family Data Sheet, Rev. 9.1
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
Freescale Semiconductor
Bit 0
Bit 0
S8
S0
0
0
Bit 0
0
0
0
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