h8s-2169 Renesas Electronics Corporation., h8s-2169 Datasheet - Page 726

• Manufacturer Part Number: h8s-2169
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

Section 22 ROM
Writes to the EV and PV bits in FLMCR1 are enabled only when SWE=1; writes to the E bit only
when SWE = 1, and ESU = 1; and writes to the P bit only when SWE = 1, and PSU = 1.
Bit 7—Flash Write Enable (FWE): Sets hardware protection against flash memory
programming/erasing. This bit cannot be modified and is always read as 1.
Bit 6—Software Write Enable (SWE): Enables or disables flash memory programming. SWE
should be set before setting bits ESU, PSU, EV, PV, E, P, and EB7 to EB0, and should not be
cleared at the same time as these bits.
Bit 6
SWE
0
1
Bit 5 and 4—Reserved: These bits cannot be modified and are always read as 0.
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
Bit 2—Program-Verify (PV): Selects program-verify mode transition or clearing. Do not set the
SWE, ESU, PSU, EV, E, or P bit at the same time.
Bit 2
PV
0
1
Rev. 3.00 Jan 18, 2006 page 698 of 1044
REJ09B0280-0300
Description
Writes disabled
Writes enabled
Description
Erase-verify mode cleared
Transition to erase-verify mode
[Setting condition]
When SWE = 1
Description
Program-verify mode cleared
Transition to program-verify mode
[Setting condition]
When SWE = 1
(Initial value)
(Initial value)
(Initial value)