Procedures For Rewriting; Interrupts During Programming - Panasonic MN101L Series User Manual

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18.2.1

Procedures for Rewriting

Figure:18.2.2 shows the ReRAM programming flow.
To access a command library, FBEWER needs to be set to "0x4B".
If not, NMI as execution of the undefined instruction is generated.
..
..
When programming ReRAM, the voltage of VDD18 must be set to 1.8 V with the PWCTR0.
..
..
18.2.2

Interrupts during Programming

When an interrupt occurs during the execution of a command library, the processing of the command library is
suspended and the interrupt process is executed. After the interrupt process is finished, the command library is
resumed.
Start Rewriting
1.Set the FBEWER to "0x4B"
2.Set the necessary parameters
in the control registers(*1).
Call
3.Subroutine-call Software
Library. (*2)
Return
4.Set the FBEWER to any value
other than "0x4B"
End Rewriting
*1 Rerer to Table 18.3.1.
*2 The reteruned value of the command library is stored in D0.
Figure:18.2.2 ReRAM programming flow
Command Library
Start
ReRAM
Programming
Command Library
End
Self-programming Rewriting Method
Chapter 18
ReRAM
XVIII - 5

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