Datasheet

Memory Subsystem
Intel
®
Quark™ microcontroller D2000
Datasheet January 2016
126 Document Number: 333577-002EN
12.4.2.7 CTRL (CTRL)
Control Register
ROM below refers to 8KB OTP region only.
MEM Offset (B0100000) 18h
Security_PolicyGroup
IntelRsvd False
Size 32 bits
Default 0000_0000h
Bits Access
Type
Default Description PowerWell
31:9 RO 23'h0 RSV (RSV)
Reserved
18:16 RW 3'h0 PRF_CNT
Number of 8B entries to be prefetched
15:9 RO 7'h0 RSV (RSV) Reserved
8 RW/V 1'h0 ERC (ERC)
Erase reference
7 RW/V 1'h0 MASS_ERASE (MASS_ERASE)
Mass Erase - set to '1' to trigger an erase of
Flash. This has no effect after FL_WR_DIS
has been written to '1'.
6 RW 1'h0 MASS_ERASE_INFO
(MASS_ERASE_INFO)
Mass Erase Info - Valid when MASS_ERAES is
'1'. When MASS_ERASE_INFO = '1' then the
ROM portion of Flash is erased during a Mass
Erase. When MASS_ERASE_INFO = '0' then
the ROM portion of Flash is not erased during
a Mass Erase. If the ROM portion of Flash is
detected as programmed by the Flash
Controller then hardware will block a ROM
erase. This has no effect after FL_WR_DIS
has been written to '1'.
5 RW 1'h0 LVE_MODE (LVE_MODE)
Low Voltage mode
4 RW/1S 1'h0 FL_WR_DIS (FL_WR_DIS)
Flash Write Disable
3 RW/1S 1'h0 ROM_RD_DIS_U (ROM_RD_DIS_U)
Rom read disable for upper 4k region of ROM
2 RW/1S 1'h0 ROM_RD_DIS_L (ROM_RD_DIS_L)
Rom read disable for lower 4k region of ROM