DEMO9S12XEP100 Freescale Semiconductor, DEMO9S12XEP100 Datasheet - Page 622

• Manufacturer Part Number: DEMO9S12XEP100
• Description: BOARD DEMO FOR MC9S12XEP100
• Manufacturer: Freescale Semiconductor
• Type: MCUr

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

Chapter 16 Freescale’s Scalable Controller Area Network (S12MSCANV3)
1. WUPIE and WUPE (see
2. Bus-off state is only defined for transmitters by the CAN standard (see Bosch CAN 2.0A/B protocol specification). Because
16.3.2.7
The transmit buffer empty flags each have an associated interrupt enable bit in the CANTIER register.
622
RSTATE[1:0]
TSTATE[1:0]
WUPIE
mechanism from stop or wait is required.
the only possible state change for the transmitter from bus-off to TxOK also forces the receiver to skip its current state to RxOK,
the coding of the RXSTAT[1:0] flags define an additional bus-off state for the receiver (see
Flag Register
CSCIE
OVRIE
RXFIE
Field
5-4
3-2
7
6
1
0
(1)
Wake-Up Interrupt Enable
0 No interrupt request is generated from this event.
1 A wake-up event causes a Wake-Up interrupt request.
CAN Status Change Interrupt Enable
0 No interrupt request is generated from this event.
1 A CAN Status Change event causes an error interrupt request.
Receiver Status Change Enable — These RSTAT enable bits control the sensitivity level in which receiver state
changes are causing CSCIF interrupts. Independent of the chosen sensitivity level the RSTAT flags continue to
indicate the actual receiver state and are only updated if no CSCIF interrupt is pending.
00 Do not generate any CSCIF interrupt caused by receiver state changes.
01 Generate CSCIF interrupt only if the receiver enters or leaves “bus-off” state. Discard other receiver state
10 Generate CSCIF interrupt only if the receiver enters or leaves “RxErr” or “bus-off”
11 Generate CSCIF interrupt on all state changes.
Transmitter Status Change Enable — These TSTAT enable bits control the sensitivity level in which transmitter
state changes are causing CSCIF interrupts. Independent of the chosen sensitivity level, the TSTAT flags
continue to indicate the actual transmitter state and are only updated if no CSCIF interrupt is pending.
00 Do not generate any CSCIF interrupt caused by transmitter state changes.
01 Generate CSCIF interrupt only if the transmitter enters or leaves “bus-off” state. Discard other transmitter
10 Generate CSCIF interrupt only if the transmitter enters or leaves “TxErr” or “bus-off” state. Discard other
11 Generate CSCIF interrupt on all state changes.
Overrun Interrupt Enable
0 No interrupt request is generated from this event.
1 An overrun event causes an error interrupt request.
Receiver Full Interrupt Enable
0 No interrupt request is generated from this event.
1 A receive buffer full (successful message reception) event causes a receiver interrupt request.
MSCAN Transmitter Flag Register (CANTFLG)
(CANRFLG)”).
changes for generating CSCIF interrupt.
receiver state changes for generating CSCIF interrupt.
state changes for generating CSCIF interrupt.
transmitter state changes for generating CSCIF interrupt.
Section 16.3.2.1, “MSCAN Control Register 0
Table 16-12. CANRIER Register Field Descriptions
MC9S12XE-Family Reference Manual , Rev. 1.23
Description
(CANCTL0)”) must both be enabled if the recovery
Section 16.3.2.5, “MSCAN Receiver
(2)
Freescale Semiconductor
state. Discard other