RX610 Group
27. Data Flash (Flash Memory for Data Storage)
R01UH0032EJ0120 Rev.1.20
Page 917 of 1006
Feb 20, 2013
27.2.6
Flash P/E Mode Entry Register (FENTRYR)
b7
b6
b5
b4
b3
b2
b1
b0
Value after reset:
0
0
0
0
0
0
0
0
FENTRYD
—
—
—
—
—
FENTRY1 FENTRY0
Address: 007F FFB2h
b15
b14
b13
b12
b11
b10
b9
b8
Value after reset:
0
0
0
0
0
0
0
0
FEKEY[7:0]
Bit
Symbol
Bit Name
Description
R/W
b0
FENTRY0
ROM P/E Mode Entry 0
See section 26, ROM (Flash Memory for Code Storage).
R/W
b1
FENTRY1
ROM P/E Mode Entry 1
See section 26, ROM (Flash Memory for Code Storage).
R/W
b6 to b2
Reserved
These bits are always read as 0. The write value should always
be 0.
R/W
b7
FENTRYD
Data Flash P/E Mode Entry
0: Data flash is in read mode
1: Data flash is in P/E mode
R/W
b15 to b8
FEKEY[7:0]
Key Code
Enable or disable rewriting of the FENTRYD, FENTRY1 and
FENTRY0 bits.
R/(W)
*
Note:
*
Write data is not retained.
FENTRYR is a register to place the ROM/data flash in P/E mode.
To place ROM/data flash in P/E mode and accept commands from the FCU, one of the FENTRYD, FENTRY1 and
FENTRY0 bits must be set to 1. If more than one bit is set to 1, the ILGLERR bit is set in FSTATR0 and the FCU enters
the command-locked state.
Only specific values written to the upper byte in word access are valid. Any other writing causes the register to be
initialized. Data written to the upper byte is not retained.
When on-chip ROM is disabled, the data read from FENTRYR is 0000h and writing is disabled.
FENTRYR is initialized by a reset, or when the FRESET bit in FRESETR is set to 1.
For FSTATR0, see section 26.2.5, Flash Status Register 0 (FSTATR0).
For FRESETR, see section 26.2.10, Flash Reset Register (FRESETR).
Summary of Contents for RX600 Series
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