Panasonic FP7 Series Command Reference Manual page 432

8.20 LIFR (Data Read (Last-In-First-Out))
Name
8-44
Description
To be set when [S] +3 (LIFO pointer) is greater than or equal to [S] (buffer size).
To be set when the buffer area exceeds the upper limit of a specified device.
WUME-FP7CPUPGR-12