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37 <div id="projectbrief">CMSIS-CORE support for Cortex-M processor-based devices</div>
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111 <div class="title">Register Mapping </div> </div>
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114 <div class="textblock"><p>The table below associates some common register names used in CMSIS to the register names used in Technical Reference Manuals.</p>
115 <table class="cmtable" summary="Register Mapping">
117 <th>CMSIS Register Name </th><th>Cortex-M3, Cortex-M4, and Cortex-M7 </th><th>Cortex-M0 and Cortex-M0+ </th><th>Register Name </th></tr>
119 <th colspan="4">Nested Vectored Interrupt Controller (NVIC) Register Access </th></tr>
121 <td>NVIC->ISER[] </td><td>NVIC_ISER0..7 </td><td>ISER </td><td>Interrupt Set-Enable Registers </td></tr>
123 <td>NVIC->ICER[] </td><td>NVIC_ICER0..7 </td><td>ICER </td><td>Interrupt Clear-Enable Registers </td></tr>
125 <td>NVIC->ISPR[] </td><td>NVIC_ISPR0..7 </td><td>ISPR </td><td>Interrupt Set-Pending Registers </td></tr>
127 <td>NVIC->ICPR[] </td><td>NVIC_ICPR0..7 </td><td>ICPR </td><td>Interrupt Clear-Pending Registers </td></tr>
129 <td>NVIC->IABR[] </td><td>NVIC_IABR0..7 </td><td>- </td><td>Interrupt Active Bit Register </td></tr>
131 <td>NVIC->IP[] </td><td>NVIC_IPR0..59 </td><td>IPR0..7 </td><td>Interrupt Priority Register </td></tr>
133 <td>NVIC->STIR </td><td>STIR </td><td>- </td><td>Software Triggered Interrupt Register </td></tr>
135 <th colspan="4">System Control Block (SCB) Register Access </th></tr>
137 <td>SCB->CPUID </td><td>CPUID </td><td>CPUID </td><td>CPUID Base Register </td></tr>
139 <td>SCB->ICSR </td><td>ICSR </td><td>ICSR </td><td>Interrupt Control and State Register </td></tr>
141 <td>SCB->VTOR </td><td>VTOR </td><td>- </td><td>Vector Table Offset Register </td></tr>
143 <td>SCB->AIRCR </td><td>AIRCR </td><td>AIRCR </td><td>Application Interrupt and Reset Control Register </td></tr>
145 <td>SCB->SCR </td><td>SCR </td><td>SCR </td><td>System Control Register </td></tr>
147 <td>SCB->CCR </td><td>CCR </td><td>CCR </td><td>Configuration and Control Register </td></tr>
149 <td>SCB->SHP[] </td><td>SHPR1..3 </td><td>SHPR2..3 </td><td>System Handler Priority Registers </td></tr>
151 <td>SCB->SHCSR </td><td>SHCSR </td><td>SHCSR </td><td>System Handler Control and State Register </td></tr>
153 <td>SCB->CFSR </td><td>CFSR </td><td>- </td><td>Configurable Fault Status Registers </td></tr>
155 <td>SCB->HFSR </td><td>HFSR </td><td>- </td><td>HardFault Status Register </td></tr>
157 <td>SCB->DFSR </td><td>DFSR </td><td>- </td><td>Debug Fault Status Register </td></tr>
159 <td>SCB->MMFAR </td><td>MMFAR </td><td>- </td><td>MemManage Fault Address Register </td></tr>
161 <td>SCB->BFAR </td><td>BFAR </td><td>- </td><td>BusFault Address Register </td></tr>
163 <td>SCB->AFSR </td><td>AFSR </td><td>- </td><td>Auxiliary Fault Status Register </td></tr>
165 <td>SCB->PFR[] </td><td>ID_PFR0..1 </td><td>- </td><td>Processor Feature Registers </td></tr>
167 <td>SCB->DFR </td><td>ID_DFR0 </td><td>- </td><td>Debug Feature Register </td></tr>
169 <td>SCB->ADR </td><td>ID_AFR0 </td><td>- </td><td>Auxiliary Feature Register </td></tr>
171 <td>SCB->MMFR[] </td><td>ID_MMFR0..3 </td><td>- </td><td>Memory Model Feature Registers </td></tr>
173 <td>SCB->ISAR[] </td><td>ID_ISAR0..4 </td><td>- </td><td>Instruction Set Attributes Registers </td></tr>
175 <td>SCB->CPACR </td><td>CPACR </td><td>- </td><td>Coprocessor Access Control Register </td></tr>
177 <th colspan="4">System Control and ID Registers not in the SCB (SCnSCB) Register Access </th></tr>
179 <td>SCnSCB->ICTR </td><td>ICTR </td><td>- </td><td>Interrupt Controller Type Register </td></tr>
181 <td>SCnSCB->ACTLR </td><td>ACTLR </td><td>- </td><td>Auxiliary Control Register </td></tr>
183 <th colspan="4">System Timer (SysTick) Control and Status Register Access </th></tr>
185 <td>SysTick->CTRL </td><td>STCSR </td><td>SYST_CSR </td><td>SysTick Control and Status Register </td></tr>
187 <td>SysTick->LOAD </td><td>STRVR </td><td>SYST_RVR </td><td>SysTick Reload Value Register </td></tr>
189 <td>SysTick->VAL </td><td>STCVR </td><td>SYST_CVR </td><td>SysTick Current Value Register </td></tr>
191 <td>SysTick->CALIB </td><td>STCR </td><td>SYST_CALIB </td><td>SysTick Calibaration Value Register </td></tr>
193 <th colspan="4">Data Watchpoint and Trace (DWT) Register Access </th></tr>
195 <td>DWT->CTRL </td><td>DWT_CTRL </td><td>- </td><td>Control Register </td></tr>
197 <td>DWT->CYCCNT </td><td>DWT_CYCCNT </td><td>- </td><td>Cycle Count Register </td></tr>
199 <td>DWT->CPICNT </td><td>DWT_CPICNT </td><td>- </td><td>CPI Count Register </td></tr>
201 <td>DWT->EXCCNT </td><td>DWT_EXCCNT </td><td>- </td><td>Exception Overhead Count Register </td></tr>
203 <td>DWT->SLEEPCNT </td><td>DWT_SLEEPCNT </td><td>- </td><td>Sleep Count Register </td></tr>
205 <td>DWT->LSUCNT </td><td>DWT_LSUCNT </td><td>- </td><td>LSU Count Register </td></tr>
207 <td>DWT->FOLDCNT </td><td>DWT_FOLDCNT </td><td>- </td><td>Folded-instruction Count Register </td></tr>
209 <td>DWT->PCSR </td><td>DWT_PCSR </td><td>- </td><td>Program Counter Sample Register </td></tr>
211 <td>DWT->COMP0..3 </td><td>DWT_COMP0..3 </td><td>- </td><td>Comparator Register 0..3 </td></tr>
213 <td>DWT->MASK0..3 </td><td>DWT_MASK0..3 </td><td>- </td><td>Mask Register 0..3 </td></tr>
215 <td>DWT->FUNCTION0..3 </td><td>DWT_FUNCTION0..3 </td><td>- </td><td>Function Register 0..3 </td></tr>
217 <th colspan="4">Instrumentation Trace Macrocell (ITM) Register Access </th></tr>
219 <td>ITM->PORT[] </td><td>ITM_STIM0..31 </td><td>- </td><td>Stimulus Port Registers </td></tr>
221 <td>ITM->TER </td><td>ITM_TER </td><td>- </td><td>Trace Enable Register </td></tr>
223 <td>ITM->TPR </td><td>ITM_TPR </td><td>- </td><td>ITM Trace Privilege Register </td></tr>
225 <td>ITM->TCR </td><td>ITM_TCR </td><td>- </td><td>Trace Control Register </td></tr>
227 <th colspan="4">Trace Port Interface (TPIU) Register Access </th></tr>
229 <td>TPI->SSPSR </td><td>TPIU_SSPR </td><td>- </td><td>Supported Parallel Port Size Register </td></tr>
231 <td>TPI->CSPSR </td><td>TPIU_CSPSR </td><td>- </td><td>Current Parallel Port Size Register </td></tr>
233 <td>TPI->ACPR </td><td>TPIU_ACPR </td><td>- </td><td>Asynchronous Clock Prescaler Register </td></tr>
235 <td>TPI->SPPR </td><td>TPIU_SPPR </td><td>- </td><td>Selected Pin Protocol Register </td></tr>
237 <td>TPI->FFSR </td><td>TPIU_FFSR </td><td>- </td><td>Formatter and Flush Status Register </td></tr>
239 <td>TPI->FFCR </td><td>TPIU_FFCR </td><td>- </td><td>Formatter and Flush Control Register </td></tr>
241 <td>TPI->FSCR </td><td>TPIU_FSCR </td><td>- </td><td>Formatter Synchronization Counter Register </td></tr>
243 <td>TPI->TRIGGER </td><td>TRIGGER </td><td>- </td><td>TRIGGER </td></tr>
245 <td>TPI->FIFO0 </td><td>FIFO data 0 </td><td>- </td><td>Integration ETM Data </td></tr>
247 <td>TPI->ITATBCTR2 </td><td>ITATBCTR2 </td><td>- </td><td>ITATBCTR2 </td></tr>
249 <td>TPI->ITATBCTR0 </td><td>ITATBCTR0 </td><td>- </td><td>ITATBCTR0 </td></tr>
251 <td>TPI->FIFO1 </td><td>FIFO data 1 </td><td>- </td><td>Integration ITM Data </td></tr>
253 <td>TPI->ITCTRL </td><td>TPIU_ITCTRL </td><td>- </td><td>Integration Mode Control </td></tr>
255 <td>TPI->CLAIMSET </td><td>CLAIMSET </td><td>- </td><td>Claim tag set </td></tr>
257 <td>TPI->CLAIMCLR </td><td>CLAIMCLR </td><td>- </td><td>Claim tag clear </td></tr>
259 <td>TPI->DEVID </td><td>TPIU_DEVID </td><td>- </td><td>TPIU_DEVID </td></tr>
261 <td>TPI->DEVTYPE </td><td>TPIU_DEVTYPE </td><td>- </td><td>TPIU_DEVTYPE </td></tr>
263 <th colspan="4">Memory Protection Unit (MPU) Register Access </th></tr>
265 <td>MPU->TYPE </td><td>MPU_TYPE </td><td>- </td><td>MPU Type Register </td></tr>
267 <td>MPU->CTRL </td><td>MPU_CTRL </td><td>- </td><td>MPU Control Register </td></tr>
269 <td>MPU->RNR </td><td>MPU_RNR </td><td>- </td><td>MPU Region Number Register </td></tr>
271 <td>MPU->RBAR </td><td>MPU_RBAR </td><td>- </td><td>MPU Region Base Address Register </td></tr>
273 <td>MPU->RASR </td><td>MPU_RASR </td><td>- </td><td>MPU Region Attribute and Size Register </td></tr>
275 <td>MPU->RBAR_A1..3 </td><td>MPU_RBAR_A1..3 </td><td>- </td><td>MPU alias Register </td></tr>
277 <td>MPU->RSAR_A1..3 </td><td>MPU_RSAR_A1..3 </td><td>- </td><td>MPU alias Register </td></tr>
279 <th colspan="4">Floating Point Unit (FPU) Register Access [only Cortex-M4 and Cortex-M7 both with FPU] </th></tr>
281 <td>FPU->FPCCR </td><td>FPCCR </td><td>- </td><td>FP Context Control Register </td></tr>
283 <td>FPU->FPCAR </td><td>FPCAR </td><td>- </td><td>FP Context Address Register </td></tr>
285 <td>FPU->FPDSCR </td><td>FPDSCR </td><td>- </td><td>FP Default Status Control Register </td></tr>
287 <td>FPU->MVFR0..1 </td><td>MVFR0..1 </td><td>- </td><td>Media and VFP Feature Registers </td></tr>
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