Fujitsu FR81S Manual Do Utilizador
CHAPTER 40: MULTI-FUNCTION SERIAL INTERFACE
7. Operation of LIN Interface (v2.1)
FUJITSU SEMICONDUCTOR LIMITED
CHAPTER : MULTI-FUNCTION SERIAL INTERFACE
FUJITSU SEMICONDUCTOR CONFIDENTIAL
274
7.4.2. Assist Mode
Serial test mode
It is similar to the serial test mode in the manual mode.
However, only master node (SCR:MS=0) can execute the serial test in LIN assist mode
(LAMCR:LAMEN=1). The result of the serial test can be confirmed with the transmission/reception flag
and the status flag. Please refer to Table 7-2 for the transmission/reception flag and the status flag.
Pseudo error test mode
In assist mode (LAMCR:LAMEN=1), the LIN bus error, the LIN ID parity error, the LIN checksum error,
and the framing error can be artificially caused. These errors simultaneous plurals it can be caused.
Moreover, the following self-diagnoses become possible by using the serial test mode together.
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Pseudo LIN bus error test mode
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Pseudo LIN ID parity error test mode
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Pseudo LIN checksum error test mode
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Pseudo framing error test mode
Method of starting pseudo error test mode
It is necessary to write in key code control bit (LAMERT:KEY1,KEY0) according to the following
procedure to start the pseudo error test mode, and to do the pseudo trouble setting effectively.
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KEY1-0="00"+ The pseudo trouble setting value is written.
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KEY1-0="01"+ The pseudo trouble setting value (the same value last time) is written.
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KEY1-0="10"+ The pseudo trouble setting value (the same value last time) is written.
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KEY1-0="11"+ The pseudo trouble setting value (the same value last time) is written.
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The pseudo trouble setting value becomes effective because of writing the fourth times.
When it doesn't follow setup steps (When other registers are written/read during the writing procedure, the
writing value is not correct, or this register is read during the writing procedure), writing becomes invalid.
The pseudo trouble setting can be released as well as setup procedure.
Notes:
The assist mode stops when the following errors occur in the assist mode, and note the setting, please.
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LIN bus error
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LIN ID parity error
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Framing error
MB91520 Series
MN705-00010-1v0-E
1587