HD64F2638F20J Datasheet, PDF (860/1512 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2600 Series

Section 21B ROM
(H8S/2638 Group, H8S/2639 Group, H8S/2630 Group)
H8S/2639, H8S/2638, H8S/2636,
H8S/2630, H8S/2635 Group
Bit 6—Software Write Enable Bit (SWE): This bit selects write and erase valid/invalid of the
flash memory. Set it when setting bits 5 to 0, bits 7 to 0 of EBR1, and bits 5 to 0* of EBR2.
Bit 6
SWE
Description
0
Writes disabled
1
Writes enabled
[Setting condition]
• When FWE = 1
Note: * Bits 3 to 0 of EBR2 for the H8S/2638 and H8S/2639.
(Initial value)
Bit 5—Erase Setup Bit (ESU): Prepares for a transition to erase mode. Set this bit to 1 before
setting the E bit in FLMCR1 to 1. Do not set the SWE, PSU, EV, PV, E, or P bit at the same time.
Bit 5
ESU
0
1
Description
Erase setup cleared
Erase setup
[Setting condition]
• When FWE = 1 and SWE = 1
(Initial value)
Bit 4—Program Setup Bit (PSU): Prepares for a transition to program mode. Set this bit to 1
before setting the P bit in FLMCR1 to 1. Do not set the SWE, ESU, EV, PV, E, or P bit at the
same time.
Bit 4
PSU
0
1
Description
Program setup cleared
Program setup
[Setting condition]
• When FWE = 1 and SWE = 1
(Initial value)
Page 810 of 1458
REJ09B0103-0800 Rev. 8.00
May 28, 2010