Datasheet

Section 22 ROM
Page 958 of 1434 R01UH0166EJ0600 Rev. 6.00
Mar 02, 2011
H8S/2633 Group, H8S/2633 F-ZTAT
TM
,
H8S/2633R F-ZTAT
TM
, H8S/2695
22.5.5 RAM Emulation Register (RAMER)
Bit: 7 6 5 4 3 2 1 0
— — — — RAMS RAM2 RAM1 RAM0
Initial value: 0 0 0 0 0 0 0 0
R/W: R R R/W R/W R/W R/W R/W R/W
RAMER specifies the area of flash memory to be overlapped with part of RAM when emulating
real-time flash memory programming. RAMER initialized to H'00 by a power-on reset and in
hardware standby mode. It is not initialized by a manual reset and in software standby mode.
RAMER settings should be made in user mode or user program mode.
Flash memory area divisions are shown in table 22.8. To ensure correct operation of the emulation
function, the ROM for which RAM emulation is performed should not be accessed immediately
after this register has been modified. Normal execution of an access immediately after register
modification is not guaranteed.
Bits 7 and 6—Reserved: These bits always read 0.
Bits 5 and 4—Reserved: Only 0 may be written to these bits.
Bit 3—RAM Select (RAMS): Specifies selection or non-selection of flash memory emulation in
RAM. When RAMS = 1, all flash memory block are program/erase-protected.
Bit 3
RAMS Description
0 Emulation not selected (Initial value)
Program/erase-protection of all flash memory blocks is disabled
1 Emulation selected
Program/erase-protection of all flash memory blocks is enabled