FLASH Interface configuration functions. More...

Functions
void	FLASH_SetLatency (uint32_t FLASH_Latency)
	Sets the code latency value. More...

void	FLASH_PrefetchBufferCmd (FunctionalState NewState)
	Enables or disables the Prefetch Buffer. More...

void	FLASH_InstructionCacheCmd (FunctionalState NewState)
	Enables or disables the Instruction Cache feature. More...

void	FLASH_DataCacheCmd (FunctionalState NewState)
	Enables or disables the Data Cache feature. More...

void	FLASH_InstructionCacheReset (void)
	Resets the Instruction Cache. More...

void	FLASH_DataCacheReset (void)
	Resets the Data Cache. More...

Detailed Description

FLASH Interface configuration functions.

 ===============================================================================
                       FLASH Interface configuration functions
 ===============================================================================

   This group includes the following functions:
    - void FLASH_SetLatency(uint32_t FLASH_Latency)
       To correctly read data from FLASH memory, the number of wait states (LATENCY) 
       must be correctly programmed according to the frequency of the CPU clock 
      (HCLK) and the supply voltage of the device.
 +-------------------------------------------------------------------------------------+     
 | Latency       |                HCLK clock frequency (MHz)                           |
 |               |---------------------------------------------------------------------|     
 |               | voltage range  | voltage range  | voltage range   | voltage range   |
 |               | 2.7 V - 3.6 V  | 2.4 V - 2.7 V  | 2.1 V - 2.4 V   | 1.8 V - 2.1 V   |
 |---------------|----------------|----------------|-----------------|-----------------|              
 |0WS(1CPU cycle)|0 < HCLK <= 30  |0 < HCLK <= 24  |0 < HCLK <= 18   |0 < HCLK <= 16   |
 |---------------|----------------|----------------|-----------------|-----------------|   
 |1WS(2CPU cycle)|30 < HCLK <= 60 |24 < HCLK <= 48 |18 < HCLK <= 36  |16 < HCLK <= 32  | 
 |---------------|----------------|----------------|-----------------|-----------------|   
 |2WS(3CPU cycle)|60 < HCLK <= 90 |48 < HCLK <= 72 |36 < HCLK <= 54  |32 < HCLK <= 48  |
 |---------------|----------------|----------------|-----------------|-----------------| 
 |3WS(4CPU cycle)|90 < HCLK <= 120|72 < HCLK <= 96 |54 < HCLK <= 72  |48 < HCLK <= 64  |
 |---------------|----------------|----------------|-----------------|-----------------| 
 |4WS(5CPU cycle)|120< HCLK <= 150|96 < HCLK <= 120|72 < HCLK <= 90  |64 < HCLK <= 80  |
 |---------------|----------------|----------------|-----------------|-----------------| 
 |5WS(6CPU cycle)|120< HCLK <= 168|120< HCLK <= 144|90 < HCLK <= 108 |80 < HCLK <= 96  | 
 |---------------|----------------|----------------|-----------------|-----------------| 
 |6WS(7CPU cycle)|      NA        |144< HCLK <= 168|108 < HCLK <= 120|96 < HCLK <= 112 | 
 |---------------|----------------|----------------|-----------------|-----------------| 
 |7WS(8CPU cycle)|      NA        |      NA        |120 < HCLK <= 138|112 < HCLK <= 120| 
 |***************|****************|****************|*****************|*****************|*****************************+
 |               | voltage range  | voltage range  | voltage range   | voltage range   | voltage range 2.7 V - 3.6 V |
 |               | 2.7 V - 3.6 V  | 2.4 V - 2.7 V  | 2.1 V - 2.4 V   | 1.8 V - 2.1 V   | with External Vpp = 9V      |
 |---------------|----------------|----------------|-----------------|-----------------|-----------------------------| 
 |Max Parallelism|      x32       |               x16                |       x8        |          x64                |              
 |---------------|----------------|----------------|-----------------|-----------------|-----------------------------|   
 |PSIZE[1:0]     |      10        |               01                 |       00        |           11                |
 +-------------------------------------------------------------------------------------------------------------------+  
   @note When VOS bit (in PWR_CR register) is reset to '0�, the maximum value of HCLK is 144 MHz.
         You can use PWR_MainRegulatorModeConfig() function to set or reset this bit.
             
    - void FLASH_PrefetchBufferCmd(FunctionalState NewState)
    - void FLASH_InstructionCacheCmd(FunctionalState NewState)
    - void FLASH_DataCacheCmd(FunctionalState NewState)
    - void FLASH_InstructionCacheReset(void)
    - void FLASH_DataCacheReset(void)
   
   The unlock sequence is not needed for these functions.

Function Documentation

void FLASH_DataCacheCmd ( FunctionalState NewState )

Enables or disables the Data Cache feature.

Parameters

NewState,: new state of the Data Cache. This parameter can be: ENABLE or DISABLE.

Return values

None

void FLASH_DataCacheReset ( void )

Resets the Data Cache.

Note: This function must be used only when the Data Cache is disabled.

Parameters

None

Return values

None

void FLASH_InstructionCacheCmd ( FunctionalState NewState )

Enables or disables the Instruction Cache feature.

Parameters

NewState,: new state of the Instruction Cache. This parameter can be: ENABLE or DISABLE.

Return values

None

void FLASH_InstructionCacheReset ( void )

Resets the Instruction Cache.

Note: This function must be used only when the Instruction Cache is disabled.

Parameters

None

Return values

None

void FLASH_PrefetchBufferCmd ( FunctionalState NewState )

Enables or disables the Prefetch Buffer.

Parameters

NewState,: new state of the Prefetch Buffer. This parameter can be: ENABLE or DISABLE.

Return values

None

void FLASH_SetLatency ( uint32_t FLASH_Latency )

Sets the code latency value.

Parameters

FLASH_Latency,:

specifies the FLASH Latency value. This parameter can be one of the following values:

FLASH_Latency_0: FLASH Zero Latency cycle
FLASH_Latency_1: FLASH One Latency cycle
FLASH_Latency_2: FLASH Two Latency cycles
FLASH_Latency_3: FLASH Three Latency cycles
FLASH_Latency_4: FLASH Four Latency cycles
FLASH_Latency_5: FLASH Five Latency cycles
FLASH_Latency_6: FLASH Six Latency cycles
FLASH_Latency_7: FLASH Seven Latency cycles

Return values

None

Functions

Detailed Description

Function Documentation