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ST7263BHx Datasheet(PDF) 21 Page - STMicroelectronics |
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ST7263BHx Datasheet(HTML) 21 Page - STMicroelectronics |
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21 / 186 page  ST7263Bxx Register and memory map Doc ID 7516 Rev 8 21/186 3 Register and memory map As shown in Figure 7, the MCU is capable of addressing 32 Kbytes of memories and I/O registers. The available memory locations consist of up to 1024 bytes of RAM including 64 bytes of register locations, and up to 32K bytes of user program memory in which the upper 32 bytes are reserved for interrupt vectors. The RAM space includes up to 128 bytes for the stack from 0100h to 017Fh. The highest address bytes contain the user reset and interrupt vectors. Caution: Memory locations noted “Reserved” must never be accessed. Accessing a reserved area can have unpredictable effects on the device. Figure 7. Memory map 0000h RAM Program memory (4 / 8 / 16 / 32 KBytes) Interrupt & Reset Vectors HW registers 0040h 003Fh FFDFh FFE0h FFFFh Reserved Stack (128 Bytes) 0100h 017Fh 01C0 / 0240 / 0440h 00FFh 0040h 0180h 01BF / 023F / 043Fh Short Addressing RAM (192 bytes) 16-bit Addressing RAM 8000h 7FFFh (See Table 5) (See Table 4) (384 / 512 / 1024 Bytes) 8000h FFDFh F000h E000h C000h 32 KBytes 16 KBytes 8 KBytes 4 KBytes 01BF / 023F / 043Fh Table 5. Interrupt vector map Vector address Description Masked Remarks Exit from Halt FFE0h-FFEDh FFEEh-FFEFh FFF0h-FFF1h FFF2h-FFF3h FFF4h-FFF5h FFF6h-FFF7h FFF8h-FFF9h FFFAh-FFFBh FFFCh-FFFDh FFFEh-FFFFh Reserved area USB interrupt vector SCI interrupt vector I²C interrupt vector TIMER interrupt vector IT1 to IT8 interrupt vector USB End Suspend mode interrupt vector Flash start programming interrupt vector TRAP (software) interrupt vector RESET vector I- bit I- bit I- bit I- bit I- bit I- bit I- bit None None Internal interrupt Internal interrupt Internal interrupt Internal interrupt External interrupt External interrupts Internal interrupt CPU interrupt No No No No Yes Yes Yes No Yes |
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