sc9s12hy64j0vllr Freescale Semiconductor, Inc, sc9s12hy64j0vllr Datasheet - Page 324

• Manufacturer Part Number: sc9s12hy64j0vllr
• Description: S12 Microcontrollers Mcu 16-bit Hcs12 Cisc 32kb Flash 5v Tray
• Manufacturer: Freescale Semiconductor, Inc

Freescale’s Scalable Controller Area Network (S12MSCANV3)
1. Read: Anytime
9.3.2.9
The CANTARQ register allows abort request of queued messages as described below.
1. Read: Anytime
324
Module Base + 0x0008
ABTRQ[2:0]
TXEIE[2:0]
Write: Anytime when not in initialization mode
Write: Anytime when not in initialization mode
Field
Field
2-0
2-0
Reset:
W
R
Transmitter Empty Interrupt Enable
0 No interrupt request is generated from this event.
1 A transmitter empty (transmit buffer available for transmission) event causes a transmitter empty interrupt
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 (see
Section 9.3.2.7, “MSCAN Transmitter Flag Register
Section 9.3.2.10, “MSCAN Transmitter Message Abort Acknowledge Register
transmit interrupt occurs if enabled. The CPU cannot reset ABTRQx. ABTRQx is reset whenever the associated
TXE flag is set.
0 No abort request
1 Abort request pending
MSCAN Transmitter Message Abort Request Register (CANTARQ)
Figure 9-12. MSCAN Transmitter Message Abort Request Register (CANTARQ)
request.
The CANTIER 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).
The CANTARQ 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).
0
0
7
= Unimplemented
Table 9-15. CANTARQ Register Field Descriptions
Table 9-14. CANTIER Register Field Descriptions
6
0
0
MC9S12HY/HA-Family Reference Manual, Rev. 1.04
0
0
5
NOTE
NOTE
4
0
0
Description
Description
(CANTFLG)”) and abort acknowledge flags (ABTAK, see
0
0
3
ABTRQ2
2
0
(CANTAAK)”) are set and a
Access: User read/write
ABTRQ1
Freescale Semiconductor
0
1
ABTRQ0
0
0
(1)