Fujitsu FR81S User Manual
CHAPTER 50: RAM DIAGNOSIS FUNCTION
4. Registers
FUJITSU SEMICONDUCTOR LIMITED
CHAPTER : RAM DIAGNOSIS FUNCTION
FUJITSU SEMICONDUCTOR CONFIDENTIAL
32
[bit7] TEIE: Interrupt enable bit resulting from a diagnosis error
TEIE
Function
0
Prohibition of an interrupt resulting from a diagnosis error
1
Enabling of an interrupt resulting from a diagnosis error
This bit is used to enable an interrupt resulting from a RAM diagnosis error for Backup RAM.
"0": Prohibits an interrupt resulting from a RAM diagnosis error.
"1": Enables an interrupt resulting from a RAM diagnosis error. If TTCRA.TEI=1 is set and the RAM
diagnosis ends, the interrupt signal (RAM diagnosis error interrupt) is output.
[bit6] TEI: Diagnosis error generation bit
TEI
Function
0
Read: No error occurrence during the RAM diagnosis.
Write: Flag clearing.
1
Read: Error occurred during the RAM diagnosis.
Write: No influence on the operation.
If TTCRA.TSTAT=1 is set when RAM diagnosis end for Backup RAM is detected, this bit is set to "1".
When "0" is written in this bit, it is cleared to "0". However, writing "1" to this bit is invalid and this bit
holds the previous value.
"1": Set TTCRA.TEI=1 when RAM diagnosis for Backup RAM is ended.
"0": Set when "0" is written.
Note:
At read access of the read-modify-write instruction, "1" is always read.
[bit5] TCIE: Interrupt enable bit for a diagnosis end factor
TCIE
Function
0
Prohibition of an interrupt for the diagnosis end factor
1
Enabling of an interrupt for the diagnosis end factor
This bit is used to enable an interrupt for the RAM diagnosis end factor for Backup RAM.
"0": Prohibits an interrupt resulting from a RAM diagnosis end.
"1": Enables an interrupt resulting from a RAM diagnosis end. The interrupt signal (RAM diagnosis end
interrupt) is output with TTCRA.TCI= 1.
MB91520 Series
MN705-00010-1v0-E
2153