/**
  ******************************************************************************
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
  * Copyright (C) Shanghai Eastsoft Microelectronics Co., Ltd. ALL rights reserved.
  *******************************************************************************
  */

<--------------------------------------------------------------------------------
Version history:
--------------------------------------------------------------------------------->
2020-07-17	V1.0.0	AE TEAM

<--------------------------------------------------------------------------------
Demo introduction:
--------------------------------------------------------------------------------->
Press K2 to write SRAM and press K3 to read SRAM.

<--------------------------------------------------------------------------------
System clock:
--------------------------------------------------------------------------------->
Internal HRC[24MHz] divided by 6, then PLL to 72MHz.

<--------------------------------------------------------------------------------
Pin connection: 
--------------------------------------------------------------------------------->
SRAM_A0	 ---- (PC0 , GPIO_FUNC_7)
SRAM_A1	 ---- (PC1 , GPIO_FUNC_7)
SRAM_A2	 ---- (PC2 , GPIO_FUNC_7)
SRAM_A3	 ---- (PC3 , GPIO_FUNC_7)
SRAM_A4	 ---- (PA4 , GPIO_FUNC_7)
SRAM_A5	 ---- (PA5 , GPIO_FUNC_7)
SRAM_A6	 ---- (PA6 , GPIO_FUNC_7)
SRAM_A7	 ---- (PA7 , GPIO_FUNC_7)
SRAM_A8	 ---- (PC4 , GPIO_FUNC_7)
SRAM_A9	 ---- (PC5 , GPIO_FUNC_7)
SRAM_A10 ---- (PB10, GPIO_FUNC_7)
SRAM_A11 ---- (PB11, GPIO_FUNC_7)
SRAM_A12 ---- (PB12, GPIO_FUNC_7)
SRAM_A13 ---- (PB13, GPIO_FUNC_7)
SRAM_A14 ---- (PB14, GPIO_FUNC_7)
SRAM_A15 ---- (PB15, GPIO_FUNC_7)
SRAM_A16 ---- (PD11, GPIO_FUNC_7)
SRAM_A17 ---- (PD12, GPIO_FUNC_7)
SRAM_A18 ---- (PD13, GPIO_FUNC_7)
SRAM_D0	 ---- (PD14, GPIO_FUNC_7)
SRAM_D1	 ---- (PD15, GPIO_FUNC_7)
SRAM_D2	 ---- (PD0 , GPIO_FUNC_7)
SRAM_D3	 ---- (PD1 , GPIO_FUNC_7)
SRAM_D4	 ---- (PE7 , GPIO_FUNC_7)
SRAM_D5	 ---- (PE8 , GPIO_FUNC_7)
SRAM_D6	 ---- (PE9 , GPIO_FUNC_7)
SRAM_D7	 ---- (PE10, GPIO_FUNC_7)
SRAM_D8	 ---- (PE11, GPIO_FUNC_7)
SRAM_D9	 ---- (PE12, GPIO_FUNC_7)
SRAM_D10 ---- (PE13, GPIO_FUNC_7)
SRAM_D11 ---- (PE14, GPIO_FUNC_7)
SRAM_D12 ---- (PE15, GPIO_FUNC_7)
SRAM_D13 ---- (PD8 , GPIO_FUNC_7)
SRAM_D14 ---- (PD9 , GPIO_FUNC_7)
SRAM_D15 ---- (PD10, GPIO_FUNC_7)
SRAM_NWE ---- (PD5,  GPIO_FUNC_7)
SRAM_NE3 ---- (PC11, GPIO_FUNC_7)
SRAM_NBL1---- (PE1,  GPIO_FUNC_7)
SRAM_NBL0---- (PE0,  GPIO_FUNC_7)
SRAM_NOE ---- (PD4,  GPIO_FUNC_7)


