h8s-2635 Renesas Electronics Corporation., h8s-2635 Datasheet - Page 872

• Manufacturer Part Number: h8s-2635
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

Section 21B ROM (H8S/2638 Group, H8S/2639 Group, H8S/2630 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.
Note: * Bits 3 to 0 of EBR2 for the H8S/2638 and H8S/2639.
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 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.
Rev. 6.00 Feb 22, 2005 page 812 of 1484
REJ09B0103-0600
Bit 6
SWE
0
1
Bit 5
ESU
0
1
Bit 4
PSU
0
1
Description
Writes disabled
Writes enabled
[Setting condition]
Description
Erase setup cleared
Erase setup
[Setting condition]
Description
Program setup cleared
Program setup
[Setting condition]
When FWE = 1
When FWE = 1 and SWE = 1
When FWE = 1 and SWE = 1
(Initial value)
(Initial value)
(Initial value)