DEMO9S12XEP100 Freescale Semiconductor, DEMO9S12XEP100 Datasheet - Page 660
DEMO9S12XEP100
Manufacturer Part Number
DEMO9S12XEP100
Description
BOARD DEMO FOR MC9S12XEP100
Manufacturer
Freescale Semiconductor
Type
MCUr
Datasheet
1.EVB9S12XEP100.pdf
(1328 pages)
Specifications of DEMO9S12XEP100
Contents
Board, Cables, CD
Processor To Be Evaluated
MC9S12XEP100
Data Bus Width
16 bit
Interface Type
RS-232
Silicon Manufacturer
Freescale
Core Architecture
S12
Core Sub-architecture
S12
Silicon Core Number
MC9S12
Silicon Family Name
S12XE
Rohs Compliant
Yes
For Use With/related Products
MC9S12XEP100
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
DEMO9S12XEP100
Manufacturer:
PANASONIC
Quantity:
46 000
Company:
Part Number:
DEMO9S12XEP100
Manufacturer:
Freescale Semiconductor
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Chapter 16 Freescale’s Scalable Controller Area Network (S12MSCANV3)
16.5
16.5.1
The procedure to initially start up the MSCAN module out of reset is as follows:
If the configuration of registers which are only writable in initialization mode shall be changed:
16.5.2
The bus-off recovery is user configurable. The bus-off state can either be left automatically or on user
request.
For reasons of backwards compatibility, the MSCAN defaults to automatic recovery after reset. In this
case, the MSCAN will become error active again after counting 128 occurrences of 11 consecutive
recessive bits on the CAN bus (see the Bosch CAN 2.0 A/B specification for details).
If the MSCAN is configured for user request (BORM set in MSCAN Control Register 1 (CANCTL1)), the
recovery from bus-off starts after both independent events have become true:
These two events may occur in any order.
660
1. Assert CANE
2. Write to the configuration registers in initialization mode
3. Clear INITRQ to leave initialization mode
1. Bring the module into sleep mode by setting SLPRQ and awaiting SLPAK to assert after the CAN
2. Enter initialization mode: assert INITRQ and await INITAK
3. Write to the configuration registers in initialization mode
4. Clear INITRQ to leave initialization mode and continue
•
•
bus becomes idle.
128 occurrences of 11 consecutive recessive bits on the CAN bus have been monitored
BOHOLD in MSCAN Miscellaneous Register (CANMISC) has been cleared by the user
Initialization/Application Information
MSCAN initialization
Bus-Off Recovery
MC9S12XE-Family Reference Manual , Rev. 1.23
Freescale Semiconductor
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