MC56F8257MLH Freescale Semiconductor, MC56F8257MLH Datasheet - Page 465

• 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

remains able to transmit messages while the receiver FIFO being filled, but all incoming
messages are discarded. As soon as a receive buffer in the FIFO is available again, new
valid messages will be accepted.
13.4.3 Identifier Acceptance Filter
The MSCAN identifier acceptance registers define the acceptable patterns of the standard
or extended identifier (ID[10:0] or ID[28:0]). Any of these bits can be marked 'don't care'
in the MSCAN identifier mask registers.
A filter hit is indicated to the application software by a set receive buffer full flag (RXF =
1) and three bits in the CAN_IDAC register. These identifier hit flags (IDHIT[2:0])
clearly identify the filter section that caused the acceptance. They simplify the application
software's task to identify the cause of the receiver interrupt. If more than one hit occurs
(two or more filters match), the lower hit has priority.
A very flexible programmable generic identifier acceptance filter has been introduced to
reduce the CPU interrupt loading. The filter is programmable to operate in four different
modes (see Bosch CAN 2.0A/B protocol specification):
Freescale Semiconductor
• Two identifier acceptance filters, each to be applied to:
• Four identifier acceptance filters, each to be applied to
• The full 29 bits of the extended identifier and to the following bits of the CAN
• The 11 bits of the standard identifier plus the RTR and IDE bits of the CAN
2.0B frame:
2.0A/B messages
2.0B compliant extended identifier. This figure shows how the first 32-bit filter
bank (CAN_IDAR0–CAN_IDAR3, CAN_IDMR0–CAN_IDMR3) produces a
filter 0 hit. Similarly, the second filter bank (CAN_IDAR4–CAN_IDAR7,
CAN_IDMR4–CAN_IDMR7) produces a filter 1 hit.
6. Although this mode can be used for standard identifiers, it is recommended to use the four or eight identifier
• Remote transmission request (RTR)
• Identifier extension (IDE)
• Substitute remote request (SRR)
acceptance filters for standard identifiers
MC56F825x/4x Reference Manual, Rev. 2, 10/2010
6
. This mode implements two filters for a full length CAN
Chapter 13 Freescale's Scalable Controller Area Network (MSCAN)
Preliminary
465