MC912DG128ACPV Freescale Semiconductor, MC912DG128ACPV Datasheet - Page 406

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MC912DG128ACPV

Manufacturer Part Number
MC912DG128ACPV
Description
IC MCU 128K FLASH 8MHZ 112-LQFP
Manufacturer
Freescale Semiconductor
Series
HC12r
Datasheet

Specifications of MC912DG128ACPV

Core Processor
CPU12
Core Size
16-Bit
Speed
8MHz
Connectivity
CAN, I²C, SCI, SPI
Peripherals
POR, PWM, WDT
Number Of I /o
69
Program Memory Size
128KB (128K x 8)
Program Memory Type
FLASH
Eeprom Size
2K x 8
Ram Size
8K x 8
Voltage - Supply (vcc/vdd)
4.5 V ~ 5.5 V
Data Converters
A/D 16x8/10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
112-LQFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant

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STATUS— BDM Status Register (1)
Development Support
20.4.5.1 STATUS
Technical Data
406
RESET:
RESET:
1. ENBDM is set to 1 by the firmware in Special Single Chip mode.
(NOTE 1)
ENBDM
BIT 7
0
0
BDMACT
6
1
0
is temporary storage for BDM commands.The CCRSAV register
preserves the content of the CPU12 CCR while BDM is active.
The only registers of interest to users are the STATUS register and the
CCRSAV register.The other BDM registers are only used by the BDM
firmware to execute commands.The registers are accessed by means of
the hardware READ_BD and WRITE_BD commands, but should not be
written during BDM operation (except the CCRSAV register which could
be written to modify the CCR value).
The STATUS register is read and written by the BDM hardware as a
result of serial data shifted in on the BKGD pin.
Read: all modes.
Write: Bits 3 through 5, and bit 7 are writable in all modes. Bit 6,
BDMACT, can only be written if bit 7 H/F in the INSTRUCTION register
is a zero. Bit 2, CLKSW, can only be written if bit 7 H/F in the
INSTRUCTION register is a one. A user would never write ones to bits
3 through 5 because these bits are only used by BDM firmware.
ENBDM — Enable BDM (permit active background debug mode)
BDMACT — Background Mode Active Status
Freescale Semiconductor, Inc.
ENTAG
For More Information On This Product,
0 = BDM cannot be made active (hardware commands still
1 = BDM can be made active to allow firmware commands.
5
0
0
allowed).
Go to: www.freescale.com
SDV
Development Support
4
0
0
TRACE
3
0
0
CLKSW
2
0
0
1
0
0
-
MC68HC912DT128A — Rev 4.0
BIT 0
0
0
-
All other modes
Special Single
Chip & Periph
MOTOROLA
$FF01

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