MC912DG128ACPV Freescale Semiconductor, MC912DG128ACPV Datasheet - Page 286

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

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

SC0SR1/SC1SR1 — SCI Status Register 1
Multiple Serial Interface
Technical Data
286
RESET:
TDRE
Bit 7
1
TC
6
1
TDRE — Transmit Data Register Empty Flag
TC — Transmit Complete Flag
The bits in these registers are set by various conditions in the SCI
hardware and are automatically cleared by special acknowledge
sequences. The receive related flag bits in SCxSR1 (RDRF, IDLE,
OR, NF, FE, and PF) are all cleared by a read of the SCxSR1 register
followed by a read of the transmit/receive data register low byte.
However, only those bits which were set when SCxSR1 was read will
be cleared by the subsequent read of the transmit/receive data
register low byte. The transmit related bits in SCxSR1 (TDRE and TC)
are cleared by a read of the SCxSR1 register followed by a write to
the transmit/receive data register low byte.
Read anytime (used in auto clearing mechanism). Write has no
meaning or effect.
New data will not be transmitted unless SCxSR1 is read before writing
to the transmit data register. Reset sets this bit.
Flag is set when the transmitter is idle (no data, preamble, or break
transmission in progress). Clear by reading SCxSR1 with TC set and
then writing to SCxDR.
Freescale Semiconductor, Inc.
For More Information On This Product,
0 = SCxDR busy
1 = Any byte in the transmit data register is transferred to the serial
0 = Transmitter busy
1 = Transmitter is idle
RDRF
5
0
shift register so new data may now be written to the transmit
data register.
Go to: www.freescale.com
Multiple Serial Interface
IDLE
4
0
OR
3
0
NF
2
0
MC68HC912DT128A — Rev 4.0
FE
1
0
Bit 0
PF
0
$00C4/$00CC
MOTOROLA