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參數(shù)資料
| 型號(hào)： | ST6245BQ1 |
| 廠商： | 意法半導(dǎo)體 |
| 元件分類： | DRAM |
| 英文描述： | The CAT24FC02 is a 2-kb Serial CMOS EEPROM internally organized as 256 words of 8 bits each |
| 中文描述： | 該CAT24FC02是一個(gè)2 KB的EEPROM的國(guó)內(nèi)256個(gè)8位每字舉辦的串行CMOS |
| 文件頁(yè)數(shù)： | 10/72頁(yè) |
| 文件大?。?/td> | 514K |
| 代理商： | ST6245BQ1 |
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10/72
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.
Table 3. ST62T45B/E45B Data Memory Space
Device
RAM
EEPROM
2 x 64 bytes
ST62T45B/E45B
1 x 64 bytes
DATAand EEPROM
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
DATA ROM WINDOW AREA
X REGISTER
Y REGISTER
V REGISTER
W REGISTER
DATARAM
PORT A DATAREGISTER
PORT B DATAREGISTER
SPI INTERRUPT DISABLE REGISTER
PORT C DATAREGISTER
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 DATAREGISTER
A/D CONTROL REGISTER
TIMER 1 PRESCALER REGISTER
TIMER 1 COUNTER REGISTER
TIMER 1 STATUS/CONTROLREGISTER
TIMER 2 PRESCALER REGISTER
TIMER 2 COUNTER REGISTER
TIMER 2 STATUS/CONTROLREGISTER
WATCHDOG REGISTER
RESERVED
RESERVED
32kHz OSCILLATOR CONTROL REGISTER
LCD MODE CONTROL REGISTER
SPI DATAREGISTER
RESERVED
EEPROM CONTROL REGISTER
LCD RAM
DATA RAM
ACCUMULATOR
* WRITE ONLYREGISTER
9
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相關(guān)代理商/技術(shù)參數(shù) |
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