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ST7260 Datasheet(PDF) 11 Page - STMicroelectronics |
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ST7260 Datasheet(HTML) 11 Page - STMicroelectronics |
11 / 117 page ST7260 11/117 3 REGISTER & MEMORY MAP As shown in Figure 4, the MCU is capable of ad- dressing 8 Kbytes of memories and I/O registers. The available memory locations consist of up to 384 bytes of RAM including 64 bytes of register lo- cations, and up to 8K bytes of user program mem- ory in which the upper 32 bytes are reserved for in- terrupt 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. IMPORTANT: Memory locations noted “Re- served” must never be accessed. Accessing a re- served area can have unpredictable effects on the device. Figure 4. Memory Map Table 4. Interrupt Vector Map Vector Address Description Masked by Remarks Exit from Halt Mode 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 Reserved Area 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 None None Internal Interrupt Internal Interrupt Internal Interrupt External Interrupt External Interrupts Internal Interrupt CPU Interrupt No No No Yes Yes Yes No Yes 0000h RAM Program Memory (4 / 8 KBytes) Interrupt & Reset Vectors HW Registers 0040h 003Fh FFDFh FFE0h FFFFh Reserved Stack (128 Bytes) 0100h 017Fh 01C0h 00FFh 0040h 0180h 01BFh Short Addressing RAM (192 bytes) 16-bit Addressing RAM 8000h 7FFFh (See Table 5) (See Table 4) (384 Bytes) FFDFh F000h E000h 8 KBytes 4 KBytes 01BFh |
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