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| 型号： | ST6200CM6/XXX |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDSO16 |
| 封装： | 0.300 INCH, ROHS COMPLIANT, PLASTIC, SOP-16 |
| 文件页数： | 5/100页 |
| 文件大小： | 3849K |
| 代理商： | ST6200CM6/XXX |
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ST6200C ST6201C ST6203C
12/100
Doc ID 4563 Rev 5
MEMORY MAP (Cont’d)
3.1.6 Data ROM Window
The Data read-only memory window is located
from address 0040h to address 007Fh in Data
space. It allows direct reading of 64 consecutive
bytes located anywhere in program memory, be-
tween address 0000h and 0FFFh.
There are 64 blocks of 64 bytes in a 4K device:
– Block 0 is related to the address range 0000h to
003Fh.
– Block 1 is related to the address range 0040h to
007Fh.
and so on...
All the program memory can therefore be used to
store either instructions or read-only data. The
Data ROM window can be moved in steps of 64
bytes along the program memory by writing the
appropriate code in the Data ROM Window Regis-
ter (DRWR).
Figure 5. Data ROM Window
3.1.6.1 Data ROM Window Register (DRWR)
The DRWR can be addressed like any RAM loca-
tion in the Data Space.
This register is used to select the 64-byte block of
program memory to be read in the Data ROM win-
dow (from address 40h to address 7Fh in Data
space). The DRWR register is not cleared on re-
set, therefore it must be written to before access-
ing the Data read-only memory window area for
the first time.
Address: 0C9h
—
Write Only
Reset Value = xxh (undefined)
Bits 7:6 = Reserved, must be cleared.
Bit 5:0 = DRWR[5:0] Data read-only memory Win-
dow Register Bits. These are the Data read-only
memory Window bits that correspond to the upper
bits of the data read-only memory space.
Caution: This register is undefined on reset, it is
write-only, therefore do not read it nor access it us-
ing Read-Modify-Write instructions (SET, RES,
INC and DEC).
0000h
0FFFh
000h
040h
07Fh
0FFh
DATA ROM
WINDOW
DATA SPACE
64-BYTE
ROM
PROGRAM
SPACE
7
0
-
DRWR5 DRWR4 DRWR3 DRWR2 DRWR1 DRWR0
1
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ST6200CM-AUTO | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:8-BIT MCUs WITH A/D CONVERTER, TWO TIMERS, OSCILLATOR SAFEGUARD & SAFE RESET |
| ST6200FNL | 制造商:Pulse Electronics Corporation 功能描述:TRANSFORMER - Bulk 制造商:Pulse Electronics Corporation 功能描述:XFRMR 1:1 SONET/SDH E4/STM-1 SMD |
| ST6200FNLT | 制造商:Pulse Electronics Corporation 功能描述:TRANSFORMER - Tape and Reel 制造商:Pulse Electronics Corporation 功能描述:XFRMR 1:1 SONET/SDH E4/STM-1 SMD |
| ST6200L | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:LOW VOLTAGE 8-BIT ROM MCUs WITH A/D CONVERTER,AND 16 PINS |
| ST6200LB1 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:LOW VOLTAGE 8-BIT ROM MCUs WITH A/D CONVERTER,AND 16 PINS |
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