ST72T251G1 View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

ST72T251G1

8-BIT MCU WITH 4 TO 8K ROM/OTP/EPROM, 256 BYTES RAM, ADC, WDG, SPI, I2C AND 2 TIMERS

STMicroelectronics 

ST72251

1.4 MEMORY MAP

Figure 5. Memory Map

0000h

007Fh

0080h

HW Registers

(see Table 3)

256 Bytes RAM

017Fh

0180h

Reserved

DFFFh

E000h

8K Bytes

Program Memory

F000h

FFDFh

FFE 0h

FFF Fh

4K Bytes

Program

Memory

Interrupt & Reset Vectors

(see Table 2)

0080h

Short Addressing

00FFh

0100h

RAM (zero page)

16-bit Addressing

013Fh

RAM

0140h

64 Bytes Stack/

16-bit Addressing RAM

017Fh

Table 2. Interrupt Vector Map

Vector Address

FF E0-FFE1h

FF E2-FFE3h

FF E4-FFE5h

FF E6-FFE7h

FF E8-FFE9h

FF EA-FF EBh

FF EC-FFE Dh

FF EE-FFE Fh

FF F0-FF F1h

FF F2-FF F3h

FF F4-FF F5h

FF F6-FF F7h

FF F8-FF F9h

FFFA-FF FBh

FF FC-FF FDh

FF FE-FF FFh

Description

Not Used

Not Used

I2C Interrupt Vector

Not Used

Not Used

Not Used

Not Used

TIMER B Interrupt Vector

Not Used

TIMER A Interrupt Vector

SPI Interrupt Vector

Not Used

External Interrupt Vector EI1

External Interrupt Vector EI0

TRAP (software) Interrupt Vector

RESET Vector

Remarks

Internal Interrupt

Internal Interrupt

Internal Interrupt

Internal Interrupt

External Interrupt

External Interrupt

CPU Interrupt

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