NEC V850E/RS1 User Manual page 591

(3) CAN global automatic block transmission control register (CnGMABT)
The CnGMABT register is used to control the automatic block transmission (ABT) operation.
Figure 16-25: CAN Global Automatic Block Transmission Control Register (CnGMABT) Format (1/2)
(a) Read
CnGMABT
(b) Write
CnGMABT
Caution:
(a) Read
ABTCLR
Remarks: 1. Set the ABTCLR bit to 1 while the ABTTRG bit is cleared to 0.
ABTTRG
Cautions: 1. Do not set the ABTTRG bit to 1 in the initialization mode. If the ABTTRG bit is set
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Chapter 16 FCAN Controller
15 14 13
0 0 0
7 6 5
0 0 0
15 14 13
0 0 0
7 6 5
0 0 0
Before changing the normal operation mode with ABT to the initialization mode, be
sure to set the CnGMABT register to the default value (0000H). After setting, confirm
that the CnGMABT register is initialized to 0000H.
Automatic block transmission engine clear status bit
0 Clearing the automatic transmission engine is completed.
1 The automatic transmission engine is being cleared.
The operation is not guaranteed if the ABTCLR bit is set to 1 while the ABTTRG bit is
set to 1.
2. When the automatic block transmission engine is cleared by setting the ABTCLR bit to
1, the ABTCLR bit is automatically cleared to 0 as soon as the requested clearing pro-
cessing is complete.
0 Automatic block transmission is stopped.
1 Automatic block transmission is under execution.
to 1 in the initialization mode, the operation is not guaranteed after the CAN mod-
ule has entered the normal operation mode with ABT.
2. Do not set the ABTTRG bit to 1 while the CnCTRL.TSTATbit is set to 1. Confirm
that the TSTAT bit = 0 before setting the ABTTRG bit to 1.
User's Manual U16702EE3V2UD00
12 11 10 9
0 0 0 0
4 3 2 1
0 0 0 ABTCLR ABTTRG
12 11 10 9
Set
0 0 0
ABTCLR
4 3 2 1
0 0 0 0
Automatic block transmission status bit
8 Address R/W After reset
0 R/W 0000H
see Table
0
16-4
8 Address R/W After reset
Set
ABTTRG
0
Clear
ABTTRG
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