MC68HC908GZ8 FREESCALE [Freescale Semiconductor, Inc], MC68HC908GZ8 Datasheet - Page 130

• Manufacturer Part Number: MC68HC908GZ8
• Description: M68HC08 Microcontrollers
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

MSCAN08 Controller (MSCAN08)
12.7 Protocol Violation Protection
The MSCAN08 will protect the user from accidentally violating the CAN protocol through programming
errors. The protection logic implements the following features:
12.8 Low-Power Modes
In addition to normal mode, the MSCAN08 has three modes with reduced power consumption: sleep, soft
reset, and power down. In sleep and soft reset mode, power consumption is reduced by stopping all
clocks except those to access the registers. In power-down mode, all clocks are stopped and no power
is consumed.
The WAIT and STOP instructions put the MCU in low-power consumption stand-by modes.
summarizes the combinations of MSCAN08 and CPU modes. A particular combination of modes is
entered for the given settings of the bits SLPAK and SFTRES. For all modes, an MSCAN08 wakeup
interrupt can occur only if SLPAK = WUPIE = 1.
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The receive and transmit error counters cannot be written or otherwise manipulated.
All registers which control the configuration of the MSCAN08 can not be modified while the
MSCAN08 is on-line. The SFTRES bit in the MSCAN08 module control register (see
MSCAN08 Module Control Register
–
–
–
–
–
The CAN
MSCAN08 module control register 1 (CMCR1)
MSCAN08 bus timing register 0 and 1 (CBTR0 and CBTR1)
MSCAN08 identifier acceptance control register (CIDAC)
MSCAN08 identifier acceptance registers (CIDAR0–3)
MSCAN08 identifier mask registers (CIDMR0–3)
TX
pin is forced to recessive when the MSCAN08 is in any of the low-power modes.
Error interrupts
Table 12-1. MSCAN08 Interrupt Vector Addresses
Function
Transmit
Wakeup
Receive
MC68HC908GZ16 • MC68HC908GZ8 Data Sheet, Rev. 4
0) serves as a lock to protect the following registers:
RWRNIF
TWRNIF
RERRIF
TERRIF
BOFFIF
Source
WUPIF
OVRIF
TXE0
TXE1
TXE2
RXF
RWRNIE
TWRNIE
RERRIE
TERRIE
BOFFIE
TXEIE0
TXEIE1
TXEIE2
WUPIE
OVRIE
RXFIE
Local
Mask
Global
Mask
I bit
Freescale Semiconductor
12.13.1
Table 12-2