MC56F8257MLH Freescale Semiconductor, MC56F8257MLH Datasheet - Page 378

• Manufacturer Part Number: MC56F8257MLH
• Description: DSC 64K FLASH 60MHZ 64-LQFP
• Manufacturer: Freescale Semiconductor
• Series: 56F8xxxr

Specifications of MC56F8257MLH

• Core Processor: 56800E
• Core Size: 16-Bit
• Speed: 60MHz
• Connectivity: CAN, I²C, LIN, SCI, SPI
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 54
• Program Memory Size: 64KB (32K x 16)
• Program Memory Type: FLASH
• Ram Size: 4K x 16
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 16x12b, D/A 1x12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 105°C
• Package / Case: 64-LQFP
• Product: DSCs
• Processor Series: 56800E
• Core: 56800E
• Device Million Instructions Per Second: 60 MIPs
• Maximum Clock Frequency: 60 MHz
• Number Of Programmable I/os: 54
• Data Ram Size: 8 KB
• Operating Supply Voltage: 3.3 V
• Maximum Operating Temperature: + 105 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 12 bit, 8 Channel
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details

Functional Description
CTRL1[WAKE] determines how the SCI is brought out of the standby state to process an
incoming message. CTRL1[WAKE] enables either idle line wakeup or address mark
wakeup:
11.4.4.9 Single-Wire Operation
Normally, the SCI uses two pins for transmitting and receiving. In single-wire operation,
the RXD pin is disconnected from the SCI and is available as a general-purpose I/O pin.
The SCI uses the TXD pin for both receiving and transmitting.
378
• Idle input line wakeup (CTRL1[WAKE] = 0): In this wakeup method, an idle
• Address mark wakeup (CTRL1[WAKE] = 1): In this wakeup method, a logic one in
condition on the RXD pin clears CTRL1[RWU] and wakes the SCI. The initial frame
(or frames) of every message contains addressing information. All receivers evaluate
the addressing information, and receivers for which the message is addressed process
the frames that follow. Any receiver for which a message is not addressed can set its
CTRL1[RWU] bit and return to the standby state. CTRL1[RWU] remains set and the
receiver remains on standby until another preamble appears on the RXD pin.
The idle line wakeup method requires that messages be separated by at least one
preamble and that no message contains preambles.
The preamble that wakes a receiver does not set the receiver idle bit, STAT[RIDLE],
or the receive data register full flag, STAT[RDRF].
the most significant bit (MSB) position of a frame clears CTRL1[RWU] and wakes
up the SCI. The logic one in the MSB position marks a frame as an address frame
that contains addressing information. All receivers evaluate the addressing
information, and the receivers for which the message is addressed process the frames
that follow. Any receiver for which a message is not addressed can set its RWU bit
and return to the standby state. CTRL1[RWU] remains set and the receiver remains
on standby until another address frame appears on the RXD pin.
The logic one MSB of an address frame clears the receiver's CTRL1[RWU] bit
before the stop bit is received and sets STAT[RDRF].
The address mark wakeup method allows messages to contain preambles but requires
that the MSB be reserved for use in address frames.
With CTRL1[WAKE] clear, setting CTRL1[RWU] after the
RXD pin is idle can cause the receiver to wake up immediately.
MC56F825x/4x Reference Manual, Rev. 2, 10/2010
Preliminary
Note
Freescale Semiconductor