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TMS370C002AFNA Datasheet(PDF) 8 Page - Texas Instruments |
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TMS370C002AFNA Datasheet(HTML) 8 Page - Texas Instruments |
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8 / 50 page  TMS370Cx0x 8-BIT MICROCONTROLLER SPNS029C – SEPTEMBER 1995 – REVISED FEBRUARY 1997 8 POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443 central processing unit (CPU) (continued) 7000h 256-Byte RAM (Register File / Stack) Peripheral File Reserved† 256-Byte Data EEPROM Reserved† System Control Digital Port Control Timer 1 Peripheral Control Vectors Not Available‡ Reserved† 0000h 0100h 00FFh 1010h 105Fh 1060h 1EFFh 1F00h 1FFFh 2000h 5FFFh 6000h 6FFFh 77FFh 7800h FFFFh 100Fh 8K-Byte ROM / EPROM (6000h – 7FFFh) Interrupts and Reset Vectors; Trap Vectors 7FBFh 7FC0h 7FFFh 8000h Peripheral File Control Registers Not Available‡ 1010h – 101Fh 1020h – 102Fh 1040h – 104Fh 1030h – 103Fh SCI1 Peripheral Control 1050h – 105Fh Trap 15 – 0 7FC0h – 7FDFh Reserved† 7FE0h – 7FEFh Serial Communications Interface TX 7FF0h – 7FF1h Serial Communications Interface RX 7FF2h – 7FF3h Timer 1 7FF4h – 7FF5h Reserved† 7FF6h – 7FF7h Interrupt 3 7FF8h – 7FF9h Interrupt 2 7FFAh – 7FFBh Interrupt 1 7FFCh – 7FFDh Reset 7FFEh – 7FFFh † Reserved means the address space is reserved for future expansion. ‡ Not available means the address space is not accessible. Figure 3. TMS370Cx0x Memory Map RAM / register file (RF) Locations within the RAM address space can serve as the RF, general-purpose read / write memory, program memory, or the stack instructions. The TMS370Cx0x devices contain 256 bytes of internal memory-mapped RAM beginning at location 0000h (R0) and continuing through location 00FFh (R255) which is shown in Figure 1. The first two registers, R0 and R1, are also called register A and B, respectively. Some instructions implicitly use register A or B; for example, the instruction LDSP (load SP) assumes that the value to be loaded into the stack pointer is contained in register B. Registers A and B are the only registers cleared on reset. peripheral file (PF) The TMS370Cx0x control registers contain all the registers necessary to operate the system and peripheral modules on the device. The instruction set includes some instructions that access the PF directly. These instructions designate the register by the number of the PF relative to 1000h, preceded by P0 for a hexadecimal designator or P for a decimal designator. For example, the system control register 0 (SCCR0) is located at address 1010h; its peripheral file hexadecimal designator is P010, and its decimal designator is P16. Table 4 shows the TMS370Cx0x PF address map. |
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