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Chapter 13
FCAN Interface Function
Preliminary User’s Manual U14913EE1V0UM00
(d) ELISA status register (ELSR)
The ELSR register indicates the ELISA status. The bits 7 to 0 can be set and cleared by writing to
the register according to the special bit-set/clear method. (Refer to chapter 13.3.1)
This register can be read in 8-bit and 16-bit units. It can be written in 16-bit units only.
Figure 13-57: ELISA Event Processing Status Register (ELSR) (1/2)
Note: The address of an interrupt pending register is calculated according to the following formula:
effective address = P address offset
Read 15
14
13 12 11 10
9
8
7
6
5
4
3
2
1
0
Address
Offset
Note
Initial
value
ELSR 0
0
0
0
1
1
0
1
CFLG TBS EER PSE PTE3 PTE2 PTE1 PTE0
918H
0920H
Write 15
14
13 12 11 10
9
8
7
6
5
4
3
2
1
0
ELSR 0 ST_TBS 0
0
0
0
0
0
0
CL_TBS CL_EER CL_PSE CL_PTE3 CL_PTE2 CL_PTE1 CL_PTE0
918H
Read
Bit Position
Bit Name
Function
7
CFLG
Determines the execution of commands with COND bit set (1). CFLG bit is modified by
ELISA in dependence of the result when executing the commands DECR_CNT,
TST_BIT.
0: Executing the DECR_CNT or TST_BIT command does not meet the criterion to
set conditional execution.
1: Executing the DECR_CNT or TST_BIT command does meet the criterion to set
conditional execution.
Remarks:
1. The execution of commands other than DECR_CNT or TST_BIT does
always clear the CFLG bit.
2. The value of CFLG bit does only influence the execution of the com-
mand which is executed directly after the DECR_CNT command or
TST_BIT command and for which conditional execution is set by the
COND bit.
6
TBS
Selects the temporary buffer bank.
0: Temporary buffer bits 0-31 are accessible by CPU
1: Temporary buffer bits 63-32 are accessible by CPU
Remarks:
1. As the local register address area is limited, the temporary buffer (64-
bits) is split into 2 banks. The TBS bit indicates which of the buffer
banks can be accessed by CPU.
2. For operation of ELISA and handling of the temporary buffers by
ELISA the TBS has no influence, that means the TBS is only relevant
for the CPU, not for ELISA
5
EER
Indicates an ELISA error.
Indicates a pending script.
0: ELISA operates without any error
1: An error occurred and ELISA stopped its operation
Remark:
Whenever an error occurs the EER flag is set and ELISA stops its opera-
tion. The CPU has to clear the EER flag to continue operation of ELISA.
The error code can be read by EERC.
4
PSE
Indicates a pending script.
0: Script event is not pending.
1: Script event is pending.
3
PTE3
Indicates a pending timer event 3.
0: Timer event 3 is not pending.
1: Timer event 3 is pending.
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