TMP86FS28DFG datasheet(21/272 Pages) TOSHIBA

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Page 9

TMP86FS28DFG

2. Operational Description

2.1 CPU Core Functions

The CPU core consists of a CPU, a system clock controller, and an interrupt controller.

This section provides a description of the CPU core, the program memory, the data memory, and the reset circuit.

2.1.1 Memory Address Map

The TMP86FS28DFG memory is composed Flash, RAM, DBR(Data buffer register) and SFR(Special func-

tion register). They are all mapped in 64-Kbyte address space. Figure 2-1 shows the TMP86FS28DFG memory

address map.

Figure 2-1 Memory Address Map

2.1.2 Program Memory (Flash)

The TMP86FS28DFG has a 61440 bytes (Address 1000H to FFFFH) of program memory (Flash ).

2.1.3 Data Memory (RAM)

The TMP86FS28DFG has 2048 bytes (Address 0040H to 083FH) of internal RAM. The first 192 bytes

(0040H to 00FFH) of the internal RAM are located in the direct area; instructions with shorten operations are

available against such an area.

SFR

0000H

64 bytes

SFR:

RAM:

Special function register includes:

I/O ports

Peripheral control registers

Peripheral status registers

System control registers

Program status word

Random access memory includes:

Data memory

Stack

003FH

RAM

0040H

2048

bytes

083FH

DBR

0F00H

256

bytes

DBR:

Data buffer register includes:

Peripheral control registers

Peripheral status registers

LCD display memory

0FFFH

1000H

Flash:

Program memory

Flash

61440

bytes

FFA0H

Vector table for interrupts

(32 bytes)

FFBFH

FFC0H

Vector table for vector call instructions

(32 bytes)

FFDFH

FFE0H

Vector table for interrupts

(32 bytes)

FFFFH

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