ST52T430 datasheet(23/88 Pages) STMICROELECTRONICS

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ST52T430/E430

23/88

3 EPROM

EPROM memory provides an on-chip user-

programmable non-volatile memory, which allows

fast and reliable storage of user data.

EPROM memory can be locked by the user. In

fact, a memory location called Lock Cell is devoted

to lock EPROM and avoid external operations. A

software identification code, called ID CODE,

distinguishes which software version is stored in

the memory.

64 kbits of memory space with an 8-bit internal

parallelism (up to 8 kbytes) addressed by an 13-bit

bus are available. The data bus is 8 bits.

Memory has a double supply: VPP is equal to

12V

±5% in Programming Phase or to V

SS during

Working Phase. VDD is equal to 5V±10%.

ST52x430 EPROM memory is divided into three

main blocks (see Figure ):

Interrupt Vectors memory block (3 through 20)

contains the addresses for the interrupt routines.

Each address is composed of three bytes.

Mbfs Setting memory block (21 through

MemAdd) contains the coordinates of the

vertexes of every Mbf defined in the program.

Figure 3.1 Program Memory Organization

The maximum value of MemAdd is 1023. This

area is dynamically assigned according to the

size of the fuzzy routines. The unused memory

area, if any, is assigned to the Program

Instruction Set memory block.

The Program Instructions Set memory block

(MemAdd through MemAddx) contains the

instruction set of the user program. The

following table summarizes the values of Mem

Addx for the different devices

Table 3.1 Mem Addx

Locations 0, 1 and 2 contain the address of the first

microcode instruction.The operations that can be

performed on EPROM during the Programming

Phase are: Stand By, Memory Writing, Reading

and Verify/Margin Mode, Memory Lock, IDCode

Writing and Verify.

ST52T430K1

ST52T430

2047

4095

8191

Program Instruction

First Address

INT_EXT

INT_SCI

INT_TIMER/PWM2

INT_TIMER/PWM1

INT_TIMER/PWM0

INT_ADC

8191

MemAdd

Mbfs Parameters

Fuzzy and Boolean

Algorithms

Program

Instruction

Set

Mbfs Setting

and Program

Instruction Set

Interrupt

Vectors

2047

4095

ST52430K2

ST52430K1

ST52430K3

MemAdd+1

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