Memory configuration of KEA128

[billchang]

When I use the MCU of KEA128 and i have some questions as follow.

1.The space of 0xC0~0x3FF looks like useless, can i use it?    

==> For example : m_data1 (rx) : ORIGIN = 0x00000200, LENGTH = 0x200

2.The space of 0x410~0x7FFF looks like useless ,can i use it?

==> For example : m_data2 (rx) : ORIGIN = 0x00000600, LENGTH = 0x200

/* Specify the memory areas */
MEMORY
{
m_interrupts (rx) : ORIGIN = 0x00000000, LENGTH = 0xC0
m_cfmprotrom (rx) : ORIGIN = 0x00000400, LENGTH = 0x10
m_boot (rx) : ORIGIN = 0x00000800, LENGTH = 0x200
m_text (rx) : ORIGIN = 0x00000A00, LENGTH = 128K - 0xA00
m_data (rwx) : ORIGIN = 0x1FFFF000, LENGTH = 16K /* SRAM */
}

[kerryzhou]

Hi Bill Chang,

   You can use it, but you also need to make sure, it won't influence the vector table area and the flash configuration area.

Wish it helps you!

If you still have question about it, please kindly let me know.

Have a great day,
Kerry

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[billchang]

Hi kerryzhou,

Thank for your kind answer.

It means the vector table area and the flash configuration area of KEA128 is default only use the 0xC0 bytes and 0x10 bytes?

If it won't influence the vector table area and the flash configuration area,those unused spaces are available?

For example : m_data3 (rx) : ORIGIN = 0x000000C0, LENGTH = 0x140

[kerryzhou · Accepted solution]

Hi Bill,

   Vector table is from address 0X00000000, length is 0XC0:

__Vectors       DCD     __initial_sp  ; Top of Stack
                DCD     Reset_Handler  ; Reset Handler
                DCD     NMI_Handler  ; NMI Handler
                DCD     HardFault_Handler  ; Hard Fault Handler
                DCD     0  ; Reserved
                DCD     0  ; Reserved
                DCD     0  ; Reserved
                DCD     0  ; Reserved
                DCD     0  ; Reserved
                DCD     0  ; Reserved
                DCD     0  ; Reserved
                DCD     SVC_Handler  ; SVCall Handler
                DCD     0  ; Reserved
                DCD     0  ; Reserved
                DCD     PendSV_Handler  ; PendSV Handler
                DCD     SysTick_Handler  ; SysTick Handler

                ; External Interrupts
                DCD     Reserved16_IRQHandler  ; Reserved interrupt 16
                DCD     Reserved17_IRQHandler  ; Reserved interrupt 17
                DCD     Reserved18_IRQHandler  ; Reserved interrupt 18
                DCD     Reserved19_IRQHandler  ; Reserved interrupt 19
                DCD     Reserved20_IRQHandler  ; Reserved interrupt 20
                DCD     FTMRE_IRQHandler  ; FTMRE command complete/read collision interrupt
                DCD     LVD_LVW_IRQHandler  ; Low Voltage Detect, Low Voltage Warning
                DCD     IRQ_IRQHandler  ; External interrupt
                DCD     I2C0_IRQHandler  ; I2C0 interrupt
                DCD     I2C1_IRQHandler  ; I2C1 interrupt
                DCD     SPI0_IRQHandler  ; SPI0 interrupt
                DCD     SPI1_IRQHandler  ; SPI1 interrupt
                DCD     UART0_IRQHandler  ; UART0 status/error interrupt
                DCD     UART1_IRQHandler  ; UART1 status/error interrupt
                DCD     UART2_IRQHandler  ; UART2 status/error interrupt
                DCD     ADC0_IRQHandler  ; ADC0 interrupt
                DCD     ACMP0_IRQHandler  ; ACMP0 interrupt
                DCD     FTM0_IRQHandler  ; FTM0 Single interrupt vector for all sources
                DCD     FTM1_IRQHandler  ; FTM1 Single interrupt vector for all sources
                DCD     FTM2_IRQHandler  ; FTM2 Single interrupt vector for all sources
                DCD     RTC_IRQHandler  ; RTC overflow
                DCD     ACMP1_IRQHandler  ; ACMP1 interrupt
                DCD     PIT_CH0_IRQHandler  ; PIT CH0 overflow
                DCD     PIT_CH1_IRQHandler  ; PIT CH1 overflow
                DCD     KBI0_IRQHandler  ; Keyboard interrupt 0
                DCD     KBI1_IRQHandler  ; Keyboard interrupt 1
                DCD     Reserved42_IRQHandler  ; Reserved interrupt 42
                DCD     ICS_IRQHandler  ; ICS interrupt
                DCD     Watchdog_IRQHandler  ; WDOG Interrupt
                DCD     PWT_IRQHandler  ; Pulse Width Timer Interrupt
                DCD     MSCAN_RX_IRQHandler  ; MSCAN Rx Interrupt
                DCD     MSCAN_TX_IRQHandler  ; MSCAN Tx, Err and Wake-up interrupt
__Vectors_End‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

From address 0x400, length X10, it is the flash configuration field.

                AREA    |.ARM.__at_0x400|, CODE, READONLY
                DCB     BackDoorK0, BackDoorK1, BackDoorK2, BackDoorK3
                DCB     BackDoorK4, BackDoorK5, BackDoorK6, BackDoorK7
                DCB     0xFF,       0xFF,       0xFF,       0xFF
                DCB     0xFF,       FPROT,      FSEC,       FOPT
                ENDIF‍‍‍‍‍‍

Other flash address you can used by yourself.

Wish it helps you!

If you still have question about it, please kindly let me know.

Have a great day,
Kerry

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Note: If this post answers your question, please click the Correct Answer button. Thank you!
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