NOTE
The SIM registers can be written only in supervisor mode. In
user mode, write accesses are blocked and will result in a bus
error.
NOTE
The SIM_SOPT1 and SIM_SOPT1CFG registers are located at
a different base address than the other SIM registers.
SIM memory map
Absolute
address
(hex)
Register name
Width
(in bits)
Access Reset value
Section/
page
4004_7000 System Options Register 1 (SIM_SOPT1) 32 R/W See section 12.2.1/193
4004_7004 SOPT1 Configuration Register (SIM_SOPT1CFG) 32 R/W 0000_0000h 12.2.2/194
4004_8004 System Options Register 2 (SIM_SOPT2) 32 R/W 0000_0000h 12.2.3/195
4004_800C System Options Register 4 (SIM_SOPT4) 32 R/W 0000_0000h 12.2.4/197
4004_8010 System Options Register 5 (SIM_SOPT5) 32 R/W 0000_0000h 12.2.5/199
4004_8018 System Options Register 7 (SIM_SOPT7) 32 R/W 0000_0000h 12.2.6/200
4004_8024 System Device Identification Register (SIM_SDID) 32 R See section 12.2.7/202
4004_8034 System Clock Gating Control Register 4 (SIM_SCGC4) 32 R/W F000_0030h 12.2.8/204
4004_8038 System Clock Gating Control Register 5 (SIM_SCGC5) 32 R/W 0000_0180h 12.2.9/206
4004_803C System Clock Gating Control Register 6 (SIM_SCGC6) 32 R/W 0000_0001h 12.2.10/207
4004_8040 System Clock Gating Control Register 7 (SIM_SCGC7) 32 R/W 0000_0100h 12.2.11/209
4004_8044 System Clock Divider Register 1 (SIM_CLKDIV1) 32 R/W See section 12.2.12/210
4004_804C Flash Configuration Register 1 (SIM_FCFG1) 32 R/W See section 12.2.13/211
4004_8050 Flash Configuration Register 2 (SIM_FCFG2) 32 R See section 12.2.14/213
4004_8058 Unique Identification Register Mid-High (SIM_UIDMH) 32 R See section 12.2.15/213
4004_805C Unique Identification Register Mid Low (SIM_UIDML) 32 R See section 12.2.16/214
4004_8060 Unique Identification Register Low (SIM_UIDL) 32 R See section 12.2.17/214
4004_8100 COP Control Register (SIM_COPC) 32 R/W 0000_000Ch 12.2.18/215
4004_8104 Service COP Register (SIM_SRVCOP) 32 W 0000_0000h 12.2.19/216
Memory map and register definition
KL25 Sub-Family Reference Manual, Rev. 3, September 2012
192 Freescale Semiconductor, Inc.