SIM_SCGC5 field descriptions (continued)Field Description19ReservedThis field is reserved.This read-only field is reserved and always has the value 0.18–14ReservedThis field is reserved.This read-only field is reserved and always has the value 0.13–11ReservedThis field is reserved.This read-only field is reserved and always has the value 0.10PORTBPort B Clock Gate ControlThis bit controls the clock gate to the Port B module.0 Clock disabled1 Clock enabled9PORTAPort A Clock Gate ControlThis bit controls the clock gate to the Port A module.0 Clock disabled1 Clock enabled8–7ReservedThis field is reserved.This read-only field is reserved and always has the value 1.6ReservedThis field is reserved.This read-only field is reserved and always has the value 0.5ReservedThis field is reserved.This read-only field is reserved and always has the value 0.4–2ReservedThis field is reserved.This read-only field is reserved and always has the value 0.1ReservedThis field is reserved.This read-only field is reserved and always has the value 0.0LPTMRLow Power Timer Access ControlThis bit controls software access to the Low Power Timer module.0 Access disabled1 Access enabledMemory map and register definitionKL04 Sub-Family Reference Manual, Rev. 3.1, November 2012178 Freescale Semiconductor, Inc.