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ST72141K2M1 Datasheet(PDF) 10 Page - STMicroelectronics |
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ST72141K2M1 Datasheet(HTML) 10 Page - STMicroelectronics |
10 / 132 page ST72141K 10/132 1.4 REGISTER & MEMORY MAP As shown in Figure 6, the MCU is capable of ad- dressing 64K bytes of memories and I/O registers. The available memory locations consist of 128 bytes of register locations, 256 bytes of RAM and 8Kbytes of user program memory. The RAM space includes up to 64 bytes for the stack from 0140h to 017Fh. The highest address bytes contain the user reset and interrupt vectors. Figure 6. Memory Map Table 2. Interrupt Vector Map 0000h Program Memory (8K Bytes) Interrupt & Reset Vectors HW Registers DFFFh 0080h 007Fh (see Table 3) E000h FFDFh FFE0h FFFFh (see Table 2) 0180h Reserved 017Fh Short Addressing RAM 16-bit Addressing 0100h 013Fh 0080h 00FFh 256 Bytes RAM RAM Stack or 16-bit Addressing 0140h 017Fh RAM (64 Bytes) “Zero page” (64 Bytes) (128 Bytes) Vector Address Description Remarks FFE0-FFE1h FFE2-FFE3h FFE4-FFE5h FFE6-FFE7h FFE8-FFE9h FFEA-FFEBh FFEC-FFEDh FFEE-FFEFh FFF0-FFF1h FFF2-FFF3h FFF4-FFF5h FFF6-FFF7h FFF8-FFF9h FFFA-FFFBh FFFC-FFFDh FFFE-FFFFh Not used Not used Not used Not used Not used TIMER B interrupt vector TIMER A interrupt vector SPI interrupt vector Motor control interrupt vector (events: E, O) Motor control interrupt vector (events: C, D) Motor control interrupt vector (events: R, Z) External interrupt vector EI1: port B7..0 External interrupt vector EI0: port A7..0 Not used TRAP (software) interrupt vector RESET vector Internal Interrupt External Interrupt External Interrupt CPU Interrupt |
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