RX610 Group
27. Data Flash (Flash Memory for Data Storage)
R01UH0032EJ0120 Rev.1.20
Page 910 of 1006
Feb 20, 2013
27.2.1
Flash Mode Register (FMODR)
—
Address: 007F C402h
b7
b6
b5
b4
b3
b2
b1
b0
Value after reset:
0
0
0
0
0
0
0
0
—
—
—
FRDMD
—
—
—
Bit
Symbol
Bit Name
Description
R/W
b3 to b0
Reserved
These bits are always read as 0. The write value should always be 0.
R/W
b4
FRDMD
FCU Read Mode Select
0: Memory Area Reading Method
The method of lock bit reading is set. Since there are no lock bits for
the data flash, undefined data are read from the data flash area after
the FCU has been placed in lock bit read mode.
1: Register Reading Method
This is the setting when the blank checking command is to be used.
R/W
b7 to b5
Reserved
These bits are always read as 0.The write value should always be 0.
R/W
FMODR is used to specify the method for the reading of lock bits. Set the FRDMD bit to 1 if blank checking is to be
used.
In modes in which the on-chip ROM is disabled, the value read from FMODR is 00h and writing is disabled.
FMODR is initialized by a reset.
FRDMD Bit (FCU Read Mode Select)
Processing for a transition of the lock bit reading mode is used in processing for blank checking of the data flash.
The FRDMD bit is used to select the method of reading when lock bit values for the ROM are read out (see section 26,
ROM (Flash Memory for Code Storage)).