MC68376BGMAB20 Freescale Semiconductor, MC68376BGMAB20 Datasheet - Page 274

• Manufacturer Part Number: MC68376BGMAB20
• Description: IC MCU 32BIT 8K ROM 160-QFP
• Manufacturer: Freescale Semiconductor
• Series: M683xxr

Specifications of MC68376BGMAB20

• Core Processor: CPU32
• Core Size: 32-Bit
• Speed: 20MHz
• Connectivity: CAN, EBI/EMI, SCI, SPI
• Peripherals: POR, PWM, WDT
• Number Of I /o: 18
• Program Memory Type: ROMless
• Ram Size: 7.5K x 8
• Voltage - Supply (vcc/vdd): 4.75 V ~ 5.25 V
• Data Converters: A/D 16x10b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 160-QFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -

13.6.3 Auto Power Save Mode
13-18
MOTOROLA
Auto power save mode enables normal operation with optimized power savings. Once
the auto power save (APS) bit in CANMCR is set, the TouCAN looks for a set of con-
ditions in which there is no need for the clocks to be running. If these conditions are
met, the TouCAN stops its clocks, thus saving power. The following conditions will
activate auto power save mode.
While its clocks are stopped, if the TouCAN senses that any one of the aforementioned
conditions is no longer true, it restarts its clocks. The TouCAN then continues to mon-
itor these conditions and stops/restarts its clocks accordingly.
• If both STOP and SELFWAKE are set and a recessive to dominant edge
• To prevent old frames from being sent when the TouCAN awakes from low-power
• If the TouCAN is in debug mode when the STOP bit is set, the TouCAN will
• Unlike other modules, the TouCAN does not come out of reset in low-power stop
• If the TouCAN is in low-power stop mode with the self-wake mechanism engaged
• No RX/TX frame in progress.
• No transfer of RX/TX frames to and from a serial message buffer, and no TX
• No CPU32 access to the TouCAN module.
• The TouCAN is not in debug mode, low-power stop mode, or the bus off state.
immediately occurs on the CAN bus, the TouCAN may never set the STOPACK
bit, and the STOP bit will be cleared.
stop mode via the self-wake mechanism, disable all transmit sources, including
transmit buffers configured for remote request responses, before placing the
TouCAN in low-power stop mode.
assume that debug mode should be exited. As a result, it will try to synchronize
with the CAN bus, and only then will it await the conditions required for entry into
low-power stop mode.
mode. The basic TouCAN initialization procedure (see 13.5.2 TouCAN Initializa-
tion) should be executed before placing the module in low-power stop mode.
and is operating with a single system clock per time quantum, there can be ex-
treme cases in which TouCAN wake-up on recessive to dominant edge may not
conform to the CAN protocol. TouCAN synchronization will be shifted one time
quantum from the wake-up event. This shift lasts until the next recessive to dom-
inant edge, which resynchronizes the TouCAN to be in conformance with the
CAN protocol. The same holds true when the TouCAN is in auto power save
mode and awakens on a recessive to dominant edge.
frame awaiting transmission in any message buffer.
CAN 2.0B CONTROLLER MODULE (TouCAN)
USER’S MANUAL
MC68336/376