MC56F8257MLH Freescale Semiconductor, MC56F8257MLH Datasheet - Page 439

• 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

13.3.10 MSCAN Transmitter Message Abort Request Register
The CAN_TARQ register allows abort request of queued messages
Address: CAN_TARQ – F440h base + 8h offset = F448h
Freescale Semiconductor
Reset
Read
Write
Bit
Reserved
Reserved
ABTRQ
TXEIE
15–3
15–3
Field
Field
2–0
2–0
15
0
(CAN_TARQ)
14
The CAN_TARQ register is held in the reset state when the
initialization mode is active (INITRQ=1 and INITAK=1). This
register is writable when not in initialization mode (INITRQ=0
and INITAK=0).
Read: Anytime
Write: Anytime when not in initialization mode
0
This read-only bitfield is reserved and always has the value zero.
Transmitter Empty Interrupt Enable
0
1
This read-only bitfield is reserved and always has the value zero.
Abort Request
The CPU sets the ABTRQx bit to request that a scheduled message buffer (TXEx=0) be aborted. The
MSCAN grants the request if the message has not already started transmission, or if the transmission is
not successful (lost arbitration or error). When a message is aborted, the associated TXE and abort
acknowledge flags are set and a transmit interrupt occurs if enabled. The CPU cannot reset ABTRQx.
ABTRQx is reset whenever the associated TXE flag is set.
No interrupt request is generated from this event.
A transmitter empty (transmit buffer available for transmission) event causes a transmitter empty
interrupt request.
13
0
12
0
MC56F825x/4x Reference Manual, Rev. 2, 10/2010
11
0
CAN_TARQ field descriptions
CAN_TIER field descriptions
Table continues on the next page...
10
0
Chapter 13 Freescale's Scalable Controller Area Network (MSCAN)
0
0
9
Preliminary
NOTE
0
8
Description
Description
0
7
0
6
0
5
0
4
0
3
0
2
ABTRQ
0
1
0
0
439