參數(shù)資料
型號(hào)： ST6218CB6/XXX
廠商： STMICROELECTRONICS
元件分類： 微控制器/微處理器
英文描述： 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDIP20
封裝： 0.300 INCH, PLASTIC, DIP-20
文件頁(yè)數(shù)： 2/82頁(yè)
文件大?。?/td> 937K
代理商： ST6218CB6/XXX
Obsolete
Product(s)
- Obsolete
Product(s)
10/82
ST62T18C/E18C
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
In ST62T18C and ST62E18C devices, the data
space includes 60 bytes of RAM, the accumulator
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 pages can also be addressed us-
ing banks of 64 bytes located between 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 Banks
Table 4. ST62T18C/E18C Data Memory Space
Device
RAM
ST62T18C/E18C
2 x 64 bytes
DATA RAM BANKS
000h
03Fh
DATA ROM WINDOW AREA
040h
07Fh
X REGISTER
080h
Y REGISTER
081h
V REGISTER
082h
W REGISTER
083h
DATA RAM
084h
0BFh
PORT A DATA REGISTER
0C0h
PORT B DATA REGISTER
0C1h
RESERVED
0C2h
PORT D DATA REGISTER
0C3h
PORT A DIRECTION REGISTER
0C4h
PORT B DIRECTION REGISTER
0C5h
RESERVED
0C6h
PORT D DIRECTION REGISTER
0C7h
INTERRUPT OPTION REGISTER
0C8h*
DATA ROM WINDOW REGISTER
0C9h*
ROM BANK SELECT REGISTER
0CAh*
RAM BANK SELECT REGISTER
0CBh*
PORT A OPTION REGISTER
0CCh
PORT B OPTION REGISTER
0CDh
RESERVED
0CEh
PORT D OPTION REGISTER
0CFh
A/D DATA REGISTER
0D0h
A/D CONTROL REGISTER
0D1h
TIMER 1 PRESCALER REGISTER
0D2h
TIMER 1 COUNTER REGISTER
0D3h
TIMER 1 STATUS/CONTROL REGISTER
0D4h
RESERVED
0D5h
UART DATA SHIFT REGISTER
0D6h
UART STATUS CONTROL REGISTER
0D7h
WATCHDOG REGISTER
0D8h
RESERVED
0D9h
I/O INTERRUPT POLARITY REGISTER
0DAh
RESERVED
0DCh*
RESERVED
0DDh
RESERVED
0DEh
0E4h
ARTIMER MODE/CONTROL REGISTER
0E5h
ARTIMER STATUS/CONTROL REGISTER ARSC0
0E6h
ARTIMER STATUS/CONTROL REGISTER ARSC1
0E7h
RESERVED
0E8h
ARTIMER RELOAD/CAPTURE REGISTER
0E9h
ARTIMER COMPARE REGISTER
0EAh
. ARTIMER LOAD REGISTER
0EBh
RESERVED
0ECh
ACCUMULATOR
OFFh
* WRITE ONLY REGISTER
10
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