ST62P45BQ1 데이터 시트보기 (PDF) - STMicroelectronics

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ST62P45BQ1

8-BIT OTP/EPROM MCU WITH LCD DRIVER, EEPROM AND A/D CONVERTER

STMicroelectronics 

ST62T45B/E45B

MEMORY MAP (Cont’d)

1.3.3 Data Space

Data Space accommodates all the data necessary

for processing the user program. This space com-

prises the RAM resource, the processor core and

peripheral registers, as well as read-only data

such as constants and look-up tables in Program

memory.

1.3.3.1 Data ROM

All read-only data is physically stored in program

memory, which also accommodates the Program

Space. The program memory consequently con-

tains the program code to be executed, as well as

the constants and look-up tables required by the

application.

The Data Space locations in which the different

constants and look-up tables are addressed by

the processor core may be thought of as a 64-byte

window through which it is possible to access the

read-only data stored in Program memory.

1.3.3.2 Data RAM/EEPROM

In ST62T45B and ST62E45B devices, the data

space includes 60 bytes of RAM, the accumulator

(A), the indirect registers (X), (Y), the short direct

registers (V), (W), the I/O port registers, the pe-

ripheral data and control registers, the interrupt

option register and the Data ROM Window regis-

ter (DRW register).

Additional RAM and EEPROM pages can also be

addressed using banks of 64 bytes located be-

tween addresses 00h and 3Fh.

1.3.4 Stack Space

Stack space consists of six 12-bit registers which

are used to stack subroutine and interrupt return

addresses, as well as the current program counter

contents.

Table 2. Additional RAM/EEPROM Banks.

Device

ST62T45B/E45B

RAM

1 x 64 bytes

EEPROM

2 x 64 bytes

Table 3. ST62T45B/E45B Data Memory Space

DATA and EEPROM

DATA ROM WINDOW AREA

X REGISTER

Y REGISTER

V REGISTER

W REGISTER

DATA RAM

PORT A DATA REGISTER

PORT B DATA REGISTER

SPI INTERRUPT DISABLE REGISTER

PORT C DATA REGISTER

PORT A DIRECTION REGISTER

PORT B DIRECTION REGISTER

PORT C DIRECTION REGISTER

RESERVED

INTERRUPT OPTION REGISTER

DATA ROM WINDOW REGISTER

RESERVED

RAM/EEPROM BANK SELECT REGISTER

PORT A OPTION REGISTER

RESERVED

PORT B OPTION REGISTER

PORT C OPTION REGISTER

A/D DATA REGISTER

A/D CONTROL REGISTER

TIMER 1 PRESC ALER REGISTER

TIMER 1 COUNTER REGISTER

TIMER 1 STATUS/CONTROL REGISTER

TIMER 2 PRESC ALER REGISTER

TIMER 2 COUNTER REGISTER

TIMER 2 STATUS/CONTROL REGISTER

WATCHDOG REGISTER

RESERVED

RESERVED

32kHz OSCILLATOR CONTROL REGISTE R

LCD MODE CONTROL REGISTER

SPI DATA REGISTER

RESERVED

EEPROM CONTROL REGISTER

LCD RAM

DATA RAM

ACCU MULATOR

* WRITE ONLY REGISTER

000h

03Fh

040h

07Fh

080h

081h

082h

083h

084h

0BFh

0C0h

0C1h

0C2h

0C3h

0C4h

0C5h

0C6h

0C7h

0C8h*

0C9h*

0CAh*

0CBh*

0CCh

0CDh

0CEh

0CFh

0D0h

0D1h

0D2h

0D3h

0D4h

0D5h

0D6h

0D7h

0D8h

0D9h

0DAh

0DBh

0DCh

0DDh

0DEh

0DFh

0E0h

0F7h

0F8h

0FEh

OFFh

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