R01UH0822EJ0100 Rev.1.00
Page 922 of 1041
Jul 31, 2019
RX13T Group
31. Flash Memory (FLASH)
31.4.15
Flash Read Buffer Register H (FRBH)
This register is used to store the upper 2 bytes of the 4-byte data (part of the unique ID) that is read from the extra area
when unique ID read is executed.
31.4.16
Flash Read Buffer Register L (FRBL)
This register is used to store the lower 2 bytes of the 4-byte data (part of the unique ID) that is read from the extra area
when unique ID read is executed.
31.4.17
Flash Write Buffer Register H (FWBH)
This register is used to set the upper 16 bits of the data for programming the ROM.
Data can be written to this register in ROM P/E mode or E2 DataFlash P/E mode.
This register is initialized by a reset or setting the FRESETR.FRESET bit to 1. Data cannot be written to this register
while the FRESETR.FRESET bit is 1.
The value read from this register is undefined while a software command is being executed.
If this register is read while executing a software command set by the FEXCR register, an undefined value is read.
Address(es): FLASH.FRBH 007F C0C4h
b15
b14
b13
b12
b11
b10
b9
b8
b7
b6
b5
b4
b3
b2
b1
b0
Value after reset:
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Address(es): FLASH.FRBL 007F C0C2h
b15
b14
b13
b12
b11
b10
b9
b8
b7
b6
b5
b4
b3
b2
b1
b0
Value after reset:
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Address(es): FLASH.FWBH 007F FF8Eh
b15
b14
b13
b12
b11
b10
b9
b8
b7
b6
b5
b4
b3
b2
b1
b0
Value after reset:
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
The data for programming the E2 DataFlash should be specified in the lower 8 bits in the FWBL register.