ST62T85BQ6 View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

ST62T85BQ6

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

STMicroelectronics 

ST62T85B/E85B

MEMORY MAP (Cont’d)

1.3.3 Data Space

Table 4. ST62T85B/E85B Data Memory 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.

DATA RAM/EEPROM, LCD RAM

DATA ROM WINDOW AREA

X REGISTER

Y REGISTER

V REGISTER

000h

03Fh

040h

07Fh

080h

081h

082h

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.

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

083h

084h

0BFh

0C0h

0C1h

0C2h

0C3h

0C4h

0C5h

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

t(s window through which it is possible to access the

read-only data stored in Program memory.

c 1.3.3.2 Data RAM/EEPROM

du In ST62T85B and ST62E85B devices, the data

ro space includes 60 bytes of RAM, the accumulator

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

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

te ripheral data and control registers, the interrupt

option register and the Data ROM Window register

le (DRW register).

so Additional RAM and EEPROM pages can also be

b addressed using banks of 64 bytes located be-

tween addresses 00h and 3Fh.

- O 1.3.4 Stack Space

t(s) Stack space consists of six 12-bit registers which

are used to stack subroutine and interrupt return

c addresses, as well as the current program counter

u contents.

rod Table 3. Additional RAM/EEPROM Banks.

P Device

RAM EEPROM LCD RAM

Obsolete ST62T85B/E85B 2 x 64 bytes 2 x 64 bytes 2 x 64 bytes

PORT C DIRECTION REGISTER

0C6h

RESERVED

0C7h

INTERRUPT OPTION REGISTER

0C8h*

DATA ROM WINDOW REGISTER

0C9h*

ROM BANK SELECT REGISTER

0CAh*

DATA RAM/EEPROM, LCD BANK SELECT REGISTER 0CBh*

PORT A OPTION REGISTER

RESERVED

0CCh

0CDh

PORT B OPTION REGISTER

0CEh

PORT C OPTION REGISTER

0CFh

A/D DATA REGISTER

0D0h

A/D CONTROL REGISTER

TIMER 1 PRESCALER REGISTER

0D1h

0D2h

TIMER 1 COUNTER REGISTER

0D3h

TIMER 1 STATUS/CONTROL REGISTER

0D4h

RESERVED

0D5h

UART DATA REGISTER

0D6h

UART CONTROL REGISTER

0D7h

WATCHDOG REGISTER

0D8h

0D9h

RESERVED

0DAh

0DBh

LCD MODE CONTROL REGISTER

0DCh

SPI DATA REGISTER

0DDh

RESERVED

0DEh

EEPROM CONTROL REGISTER

0DFh

0E0h

RESERVED

0E4h

ARTIMER MODE/CONTROL REGISTER

0E5h

ARTIMER STATUS/CONTROL REGISTER 0

0E6h

ARTIMER STATUS/CONTROL REGISTER 1

0E7h

RESERVED

ARTIMER RELOAD/CAPTURE REGISTER

0E9h

ARTIMER COMPARE REGISTER

0EAh

ARTIMER LOAD REGISTER

0EBh

0ECh

RESERVED

0FEh

ACCUMULATOR

OFFh

* WRITE ONLY REGISTER

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