481
CHAPTER 23 CAN CONTROLLER
23.6.8
Transmission Request Register (TREQR)
Transmission request register (TREQR) stores transmission requests to the message
buffers (x) or displays their state.
■
Transmission Request Register (TREQR)
Figure 23.6-11 Configuration of the Transmission Request Register (TREQR)
[bit15 to bit0] TREQ15 to TREQ0:
When "1" is written to TREQx, transmission to the message buffer (x) starts. If RFWTx of the remote
frame receiving wait register (RFWTR)
*1
is "0", transmission starts immediately. However, if RFWTx = 1,
transmission starts after waiting until a remote frame is received (RRTRx of the remote request receiving
register (RRTRR)
*1
becomes "1"). Transmission starts
*2
immediately even when RFWTx = 1, if RRTRx
is already "1" when "1" is written to TREQx.
*1: For RFWTR and TRTRR, see Sections "23.6.9 Transmission RTR Register (TRTRR)" and "23.6.10
Remote Frame Receiving Wait Register (RFWTR)".
*2: For cancellation of transmission, see Sections "23.6.11 Transmission Cancel Register (TCANR)" and
"23.6.12 Transmission Complete Register (TCR)".
Writing "0" to TREQx is ignored.
"0" is read when a Read Modify Write (RMW) instruction is performed.
If clearing (to "0") at completion of the transmit operation and setting by writing "1" are concurrent,
clearing is preferred.
If "1" is written to more than one bit, transmission is performed, starting with the lower-numbered message
buffer (x).
TREQx is "1" while transmission is pending, and becomes "0" when transmission is completed or canceled.
15
bit
bit
14
13
12
11
10
9
8
Initial value
0 0 0 0 0 0 0 0
B
R/W R/W R/W R/W
R/W
R/W
R/W
R/W
Address:
H
CAN0: 000073
CAN1: 000083
CAN2: 003573
CAN3: 003583
CAN4: 003593
H
H
H
H
TREQRn (upper)
Initial value
0 0 0 0 0 0 0 0
B
Address:
H
CAN0: 000072
CAN1: 000082
CAN2: 003572
CAN3: 003582
CAN4: 003592
H
H
H
H
TREQRn (lo
w
er)
TREQ15 TREQ14 TREQ13 TREQ12 TREQ11 TREQ10 TREQ9 TREQ8
TREQ7 TREQ6 TREQ5 TREQ4 TREQ3 TREQ2 TREQ1 TREQ0
R/W R/W R/W R/W
R/W
R/W
R/W
R/W
n = 0, 1, 2, 3, 4
7
6
5
4
3
2
1
0
Содержание MB90390 Series
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Страница 17: ...xiii APPENDIX D List of Interrupt Vectors 690 INDEX 695 ...
Страница 18: ...xiv ...
Страница 132: ...104 CHAPTER 5 CLOCKS ...
Страница 152: ...124 CHAPTER 6 CLOCK MODULATOR ...
Страница 210: ...182 CHAPTER 11 TIME BASE TIMER ...
Страница 218: ...190 CHAPTER 12 WATCHDOG TIMER ...
Страница 264: ...236 CHAPTER 14 16 BIT RELOAD TIMER WITH EVENT COUNT FUNCTION ...
Страница 274: ...246 CHAPTER 15 WATCH TIMER ...
Страница 306: ...278 CHAPTER 17 DTP EXTERNAL INTERRUPTS ...
Страница 338: ...310 CHAPTER 18 8 10 BIT A D CONVERTER ...
Страница 364: ...336 CHAPTER 19 UART0 UART1 ...
Страница 398: ...370 CHAPTER 20 UART2 UART3 Figure 20 5 2 ORE Set Timing Receive data RDRF ORE ...
Страница 432: ...404 CHAPTER 20 UART2 UART3 ...
Страница 482: ...454 CHAPTER 22 SERIAL I O ...
Страница 560: ...532 CHAPTER 24 STEPPING MOTOR CONTROLLER ...
Страница 582: ...554 CHAPTER 27 ROM MIRRORING MODULE ...
Страница 632: ...604 CHAPTER 29 EXAMPLES OF SERIAL PROGRAMMING CONNECTION ...
Страница 722: ...694 APPENDIX ...
Страница 723: ...695 INDEX The index follows on the next page This is listed in alphabetic order ...
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