R0K572011S000BE Renesas Electronics America, R0K572011S000BE Datasheet - Page 1032

• Manufacturer Part Number: R0K572011S000BE
• Description: KIT STARTER FOR SH7201
• Manufacturer: Renesas Electronics America
• Series: Renesas Starter Kits (RSK)r
• Type: MCUr

Specifications of R0K572011S000BE

• Contents: CPU Board, LCD Display Module, E8 Emulator, Cable, QuickStart Guide and CD-ROM
• For Use With/related Products: SH7201
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Section 25 Power-Down Modes
25.2.8
RAMKP is an 8-bit readable/writable register that specifies whether or not to retain data in the
corresponding on-chip RAM area in deep standby mode. RAMKP is initialized to H'00 by a
power-on reset or in deep standby mode but retains its previous value by a manual reset or in
software standby mode. Only byte access is valid.
When an RAMKP bit is set to 1, data in the corresponding on-chip RAM area is retained in deep
standby mode. When an RAMWE bit is cleared to 0, data in the corresponding on-chip RAM is
not retained in deep standby mode.
Deep standby mode is canceled by an interrupt (NMI or IRQ) or a reset (manual reset or power-on
reset). However, when deep standby mode is canceled by a power-on reset, the contents in the
corresponding on-chip RAM area are not retained even with the RAMKP bit set to 1.
Page 1004 of 1190
Bit
7 to 4
3
2
1
0
RAM Retaining Area Specifying Register (RAMKP)
Bit Name
⎯
RAMKP3
RAMKP2
RAMKP1
RAMKP0
Initial value:
Initial
Value
All 0
0
0
0
0
R/W:
Bit:
R
7
0
R/W
R
R/W
R/W
R/W
R/W
R
6
0
Description
Reserved
These bits are always read as 0. The write value
should always be 0.
RAM Retaining Area 3 (corresponding RAM
addresses: H'FFF86000 to H'FFF87FFF)
0: Data in RAM is not retained in deep standby mode
1: Data in RAM is retained in deep standby mode
RAM Retaining Area 2 (corresponding RAM
addresses: H'FFF84000 to H'FFF85FFF)
0: Data in RAM is not retained in deep standby mode
1: Data in RAM is retained in deep standby mode
RAM Retaining Area 1 (corresponding RAM
addresses: H'FFF82000 to H'FFF83FFF)
0: Data in RAM is not retained in deep standby mode
1: Data in RAM is retained in deep standby mode
RAM Retaining Area 0 (corresponding RAM
addresses: H'FFF80000 to H'FFF81FFF)
0: Data in RAM is not retained in deep standby mode
1: Data in RAM is retained in deep standby mode
R
5
0
R
4
0
RAM
R/W
KP3
3
0
RAM
KP2
R/W
2
0
RAM
KP1
R/W
1
0
RAM
KP0
R/W
0
0
R01UH0026EJ0300 Rev. 3.00
SH7201 Group
Sep 24, 2010