TMS370C742AFNT Datasheet, PDF (9/69 Pages) Texas Instruments – 8-BIT MICROCONTROLLER

memory map (continued)
TMS370Cx4x
8-BIT MICROCONTROLLER
SPNS016C -- NOVEMBER 1992 -- REVISED FEBRUARY 1997
0000h
00FFh
0100h
0FFFh
1000h
10FFh
1100h
1EFFh
1F00h
1FFFh
2000h
5FFFh
6000h
6FFFh
7000h
7FBFh
7FC0h
7FFFh
8000h
FFFFh
256-Byte RAM (Register File/Stack)
Reserved
Peripheral File
Reserved
256-Byte Data EEPROM
Not Available
8K-Byte ROM or EPROM
(0000h -- 7FFFh)
4K-Byte ROM
(7000h -- 7FFFh)
Interrupts and Reset
Vectors; Trap Vectors
Not Available
Reserved
System Control
Digital Port Control
Reserved
Timer 1 Peripheral Control
SCI1 Peripheral Control
Timer 2A Peripheral Control
ADC1 Peripheral Control
Reserved
1000h -- 100Fh
1010h -- 101Fh
1020h -- 102Fh
1030h -- 103Fh
1040h -- 104Fh
1050h -- 105Fh
1060h -- 106Fh
1070h -- 107Fh
1080h -- 10FFh
Vectors
Trap 15-0
Reserved
A-D Converter 1
Timer 2A
Serial Comm I/F TX
Serial Comm I/F RX
Timer 1
Reserved
Interrupt 3
Interrupt 2
Interrupt 1
Reset
7FC0h -- 7FDFh
7FE0h -- 7FEBh
7FECh -- 7FEDh
7FEEh -- 7FEFh
7FF0h -- 7FF1h
7FF2h -- 7FF3h
7FF4h -- 7FF5h
7FF6h -- 7FF7h
7FF8h -- 7FF9h
7FFAh -- 7FFBh
7FFCh -- 7FFDh
7FFEh -- 7FFFh
Figure 3. TMS370Cx4x 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 TMS370Cx4x devices contain 256 bytes of internal RAM memory
mapped beginning at location 0000h (R0) and continuing through location 00FFh (R255).
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 TMS370Cx4x 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 TMS370Cx4x PF address map.
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