HD64F2638F20J Datasheet, PDF (808/1512 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2600 Series

Section 21A ROM
(H8S/2636 Group)
H8S/2639, H8S/2638, H8S/2636,
H8S/2630, H8S/2635 Group
Bit 6—Software Write Enable Bit (SWE): Enables or disables flash memory programming and
erasing. Set this bit when setting bits 5 to 0, bits 7 to 0 of EBR1, and bits 1 and 0 of EBR2.
Bit 6: SWE
0
1
Description
Writes disabled
Writes enabled
[Setting condition]
• When FWE = 1
(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)
Bit 3—Erase-Verify (EV): Selects erase-verify mode transition or clearing. Do not set the SWE,
ESU, PSU, PV, E, or P bit at the same time.
Bit 3: EV
0
1
Description
Erase-verify mode cleared
Transition to erase-verify mode
[Setting condition]
• When FWE = 1 and SWE = 1
(Initial value)
Page 758 of 1458
REJ09B0103-0800 Rev. 8.00
May 28, 2010