m_data is started from 0x20000000.
K70FN1M0_ram.lcf:
Default linker command file
MEMORY {
m_interrupts (RX) : ORIGIN = 0x1FFF0000, LENGTH = 0x000001E8
m_text (RX) : ORIGIN = 0x1FFF01E8, LENGTH = 0x00010000-0x000001E8
m_data (RW) : ORIGIN = 0x20000000, LENGTH = 0x00010000
}