NVRAM_ADDR
data = (char *)(NVRAM_ADDR + 0x80);
{ NVRAM_ADDR, NVRAM_SPACE, RW },
(volatile uint32_t *)(NVRAM_ADDR + MK_NVRAM_SPACE);
volatile uint8_t *chiptime = (volatile uint8_t *)NVRAM_ADDR;
data = (char *)(NVRAM_ADDR + 0x80);