MC912D60CCPVE Freescale Semiconductor, MC912D60CCPVE Datasheet - Page 310

IC MCU 16BIT 112-LQFP

MC912D60CCPVE

Manufacturer Part Number
MC912D60CCPVE
Description
IC MCU 16BIT 112-LQFP
Manufacturer
Freescale Semiconductor
Series
HC12r
Datasheet

Specifications of MC912D60CCPVE

Core Processor
CPU12
Core Size
16-Bit
Speed
8MHz
Connectivity
CAN, MI Bus, SCI, SPI
Peripherals
POR, PWM, WDT
Number Of I /o
68
Program Memory Size
60KB (60K x 8)
Program Memory Type
FLASH
Eeprom Size
1K x 8
Ram Size
2K 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
Processor Series
HC912D
Core
HC12
Data Bus Width
16 bit
Data Ram Size
2 KB
Interface Type
CAN, SCI, SPI
Maximum Clock Frequency
8 MHz
Number Of Programmable I/os
86
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
3rd Party Development Tools
EWHCS12
Minimum Operating Temperature
- 40 C
On-chip Adc
10 bit, 8 Channel
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

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MSCAN Controller
17.5 Identifier Acceptance Filter
Technical Data
310
If more than one buffer is scheduled for transmission when the CAN bus
becomes available for arbitration, the msCAN12 uses the local priority
setting of the three buffers for prioritisation. For this purpose every
transmit buffer has an 8-bit local priority field (PRIO). The application
software sets this field when the message is set up. The local priority
reflects the priority of this particular message relative to the set of
messages being emitted from this node. The lowest binary value of the
PRIO field is defined to be the highest priority.
The internal scheduling process takes places whenever the msCAN12
arbitrates for the bus. This is also the case after the occurrence of a
transmission error.
When a high priority message is scheduled by the application software
it may become necessary to abort a lower priority message being set up
in one of the three transmit buffers. As messages that are already under
transmission cannot be aborted, the user has to request the abort by
setting the corresponding abort request flag (ABTRQ) in the
transmission control register (CTCR). The msCAN12 grants the request,
if possible, by setting the corresponding abort request acknowledge
(ABTAK) and the TXE flag in order to release the buffer and by
generating a transmit interrupt. The transmit interrupt handler software
can tell from the setting of the ABTAK flag whether the message was
aborted (ABTAK=1) or sent in the meantime (ABTAK=0).
The identifier acceptance registers (CIDAR0–7) define the acceptable
patterns of the standard or extended identifier (ID10–ID0 or ID28–ID0).
Any of these bits can be marked don’t care in the identifier mask
registers (CIDMR0–7).
A filter hit is indicated to the application software by a set RXF (receive
buffer full flag, see
three bits in the identifier acceptance control register (see
Identifier Acceptance Control Register
flags (IDHIT2–0) clearly identify the filter section that caused the
acceptance. They simplify the application software’s task to identify the
MSCAN Controller
msCAN12 Receiver Flag Register
(CIDAC)). These identifier hit
MC68HC912D60A — Rev. 3.1
Freescale Semiconductor
(CRFLG)) and
msCAN12

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