ST62T80B_07 Datasheet, PDF (10/80 Pages) STMicroelectronics – 8-BIT OTP/EPROM MCU WITH LCD DRIVER EEPROM AND A/D CONVERTER

ST62T80B/E80B
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 ST62T80B and ST62E80B 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 register
(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 3. Additional RAM/EEPROM Banks.
Device
RAM EEPROM LCD RAM
ST62T80B/E80B 2 x 64 bytes 2 x 64 bytes 2 x 64 bytes
Table 4. ST62T80B/E80B Data Memory Space
DATA RAM/EEPROM, LCD RAM
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
ROM BANK SELECT REGISTER
DATA RAM/EEPROM, LCD 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 PRESCALER REGISTER
TIMER 1 COUNTER REGISTER
TIMER 1 STATUS/CONTROL REGISTER
RESERVED
UART DATA REGISTER
UART CONTROL REGISTER
WATCHDOG REGISTER
RESERVED
32kHz OSCILLATOR CONTROL REGISTER
LCD MODE CONTROL REGISTER
SPI DATA REGISTER
RESERVED
EEPROM CONTROL 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
RESERVED
ARTIMER MODE/CONTROL REGISTER
ARTIMER STATUS/CONTROL REGISTER 0
ARTIMER STATUS/CONTROL REGISTER 1
RESERVED
ARTIMER RELOAD/CAPTURE REGISTER
ARTIMER COMPARE REGISTER
ARTIMER LOAD REGISTER
RESERVED
ACCUMULATOR
* WRITE ONLY REGISTER
0E4h
0E5h
0E6h
0E7h
0E9h
0EAh
0EBh
0ECh
0FEh
OFFh
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