CAN 2.0B Controller Module
MPC561/MPC563 Reference Manual, Rev. 1.2
Freescale Semiconductor
16-31
16.7.8
Free Running Timer (TIMER)
16.7.9
Receive Global Mask Registers (RXGMSKHI, RXGMSKLO)
MSB
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
LSB
15
Field
TIMER
SRESET
0000_0000_0000_0000
Addr
0x30 708A (TIMER_A); 0x30 748A (TIMER_B); 0x30 788A (TIMER_C)
Figure 16-15. Free Running Timer Register (TIMER)
Table 16-19. TIMER Bit Descriptions
Bits
Name
Description
0:15
TIMER
The free running timer counter can be read and written by the CPU. The timer starts from
zero after reset, counts linearly to 0xFFFF, and wraps around.
The timer is clocked by the TouCAN bit-clock. During a message, it increments by one for
each bit that is received or transmitted. When there is no message on the bus, it increments
at the nominal bit rate.
The timer value is captured at the beginning of the identifier field of any frame on the CAN
bus. The captured value is written into the “time stamp” entry in a message buffer after a
successful reception or transmission of a message.
MSB
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Field MID
28
MID
27
MID
26
MID
25
MID
24
MID
23
MID
22
MID
21
MID
20
MID
19
MID
18
0
1
MID
17
MID
16
MID
15
SRESET
1
1
1
1
1
1
1
1
1
1
1
0
1
1
1
1
Addr
0x30 7090 (RxGMSKHI_A); 0x30 7490 (RxGMSKHI_B); 0x30 7890 (RxGMSKHI_C);
0x30 7092 (RxGMSKLO_A); 0x30 7492 (RxGMSKLO_B); 0x30 7892 (RxGMSKLO_C)
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
LSB
31
Field MID
14
MID
13
MID
12
MID
11
MID
10
MID
9
MID
8
MID
7
MID
6
MID
5
MID
4
MID
3
MID
2
MID
1
MID
0
0
SRESET
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
Figure 16-16. Receive Global Mask Register: High (RXGMSKHI), Low (RXGMSKLO)
Summary of Contents for MPC561
Page 84: ...MPC561 MPC563 Reference Manual Rev 1 2 lxxxiv Freescale Semiconductor...
Page 144: ...Signal Descriptions MPC561 MPC563 Reference Manual Rev 1 2 2 46 Freescale Semiconductor...
Page 206: ...Central Processing Unit MPC561 MPC563 Reference Manual Rev 1 2 3 62 Freescale Semiconductor...
Page 302: ...Reset MPC561 MPC563 Reference Manual Rev 1 2 7 14 Freescale Semiconductor...
Page 854: ...Time Processor Unit 3 MPC561 MPC563 Reference Manual Rev 1 2 19 24 Freescale Semiconductor...
Page 968: ...Development Support MPC561 MPC563 Reference Manual Rev 1 2 23 54 Freescale Semiconductor...
Page 1144: ...Internal Memory Map MPC561 MPC563 Reference Manual Rev 1 2 B 34 Freescale Semiconductor...
Page 1212: ...TPU3 ROM Functions MPC561 MPC563 Reference Manual Rev 1 2 D 60 Freescale Semiconductor...
Page 1216: ...Memory Access Timing MPC561 MPC563 Reference Manual Rev 1 2 E 4 Freescale Semiconductor...