Datenblatt-Suchmaschine für elektronische Bauteile
  German  ▼
ALLDATASHEETDE.COM

X  

ST62T45B Datenblatt(PDF) 11 Page - STMicroelectronics

Teilenummer ST62T45B
Bauteilbeschribung  8-BIT OTP/EPROM MCU WITH LCD DRIVER, EEPROM AND A/D CONVERTER
Download  72 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Hersteller  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST62T45B Datenblatt(HTML) 11 Page - STMicroelectronics

Back Button ST62T45B Datasheet HTML 7Page - STMicroelectronics ST62T45B Datasheet HTML 8Page - STMicroelectronics ST62T45B Datasheet HTML 9Page - STMicroelectronics ST62T45B Datasheet HTML 10Page - STMicroelectronics ST62T45B Datasheet HTML 11Page - STMicroelectronics ST62T45B Datasheet HTML 12Page - STMicroelectronics ST62T45B Datasheet HTML 13Page - STMicroelectronics ST62T45B Datasheet HTML 14Page - STMicroelectronics ST62T45B Datasheet HTML 15Page - STMicroelectronics Next Button
Zoom Inzoom in Zoom Outzoom out
 11 / 72 page
background image
11/72
ST62T45B/E45B
MEMORY MAP (Cont’d)
1.3.5 Data Window Register (DWR)
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 1FFFh (top memory ad-
dress depends on the specific device). All the pro-
gram memory can therefore be used to store either
instructions or read-only data. Indeed, the window
can be moved in steps of 64 bytes along the pro-
gram memory by writing the appropriate code in the
Data Window Register (DWR).
The DWR can be addressed like any RAM loca-
tion in the Data Space, it is however a write-only
register and therefore cannot be accessed using
single-bit operations. This register is used to posi-
tion the 64-byte read-only data window (from ad-
dress 40h to address 7Fh of the Data space) in
program memory in 64-byte steps. The effective
address of the byte to be read as data in program
memory is obtained by concatenating the 6 least
significant bits of the register address given in the
instruction (as least significant bits) and the con-
tent of the DWR register (as most significant bits),
as illustrated in Figure 5 below. For instance,
when addressing location 0040h of the Data
Space, with 0 loaded in the DWR register, the
physical location addressed in program memory is
00h. The DWR register is not cleared on reset,
therefore it must be written to prior to the first ac-
cess to the Data read-only memory window area.
Data Window Register (DWR)
Address: 0C9h
Write Only
Bits 7, 6 = Not used.
Bit 5-0 = DWR5-DWR0:
Data read-only memory
Window 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. Nei-
ther read nor single bit instructions may be used to
address this register.
Note: Care is required when handling the DWR
register as it is write only. For this reason, the
DWR contents should not be changed while exe-
cuting an interrupt service routine, as the service
routine cannot save and then restore the register’s
previous contents. If it is impossible to avoid writ-
ing to the DWR during the interrupt service rou-
tine, an image of the register must be saved in a
RAM location, and each time the program writes
to the DWR, it must also write to the image regis-
ter. The image register must be written first so
that, if an interrupt occurs between the two instruc-
tions, the DWR is not affected.
Figure 5. Data read-only memory Window Memory Addressing
70
-
-
DWR5 DWR4 DWR3 DWR2 DWR1 DWR0
DATA ROM
WINDOW REGISTER
CONTENTS
DATA SPACE ADDRESS
40h-7Fh
IN INSTRUCTION
PROGRAM SPACE ADDRESS
7654
32
0
543
210
543
210
READ
1
6
7
8
9
10
11
0
1
VR01573C
12
1
0
DATA SPACE ADDRESS
:
:
59h
0
0
0
0
1
00
1
1
1
Example:
(DWR)
DWR=28h
11
000
00
00
1
ROM
ADDRESS:A19h
11
13
0
1
10


Ähnliche Teilenummer - ST62T45B

HerstellerTeilenummerDatenblattBauteilbeschribung
logo
STMicroelectronics
ST62T40 STMICROELECTRONICS-ST62T40 Datasheet
256Kb / 3P
   EPROM PROGRAMMING BOARDS FOR ST62 MCU FAMILY
ST62T40B STMICROELECTRONICS-ST62T40B Datasheet
445Kb / 72P
   8-BIT OTP/EPROM MCU WITH LCD DRIVER, EEPROM AND A/D CONVERTER
August 1999 Rev. 2.6
ST62T40B STMICROELECTRONICS-ST62T40B Datasheet
1Mb / 76P
   8-BIT OTP/EPROM MCU WITH LCD DRIVER, EEPROM AND A/D CONVERTER
ST62T42 STMICROELECTRONICS-ST62T42 Datasheet
256Kb / 3P
   EPROM PROGRAMMING BOARDS FOR ST62 MCU FAMILY
ST62T42B STMICROELECTRONICS-ST62T42B Datasheet
410Kb / 68P
   8-BIT OTP/EPROM MCU WITH LCD DRIVER, EEPROM AND A/D CONVERTER
August 1999 Rev. 2.6
More results

Ähnliche Beschreibung - ST62T45B

HerstellerTeilenummerDatenblattBauteilbeschribung
logo
STMicroelectronics
ST62T40B STMICROELECTRONICS-ST62T40B Datasheet
445Kb / 72P
   8-BIT OTP/EPROM MCU WITH LCD DRIVER, EEPROM AND A/D CONVERTER
August 1999 Rev. 2.6
ST62T80B STMICROELECTRONICS-ST62T80B_07 Datasheet
1Mb / 80P
   8-BIT OTP/EPROM MCU WITH LCD DRIVER EEPROM AND A/D CONVERTER
ST6240B STMICROELECTRONICS-ST6240B Datasheet
1Mb / 76P
   8-BIT OTP/EPROM MCU WITH LCD DRIVER, EEPROM AND A/D CONVERTER
ST6280B STMICROELECTRONICS-ST6280B Datasheet
1Mb / 78P
   8-BIT OTP/EPROM MCU WITH LCD DRIVER EEPROM AND A/D CONVERTER
September 1998 Rev. 2.4
ST62T42B STMICROELECTRONICS-ST62T42B Datasheet
410Kb / 68P
   8-BIT OTP/EPROM MCU WITH LCD DRIVER, EEPROM AND A/D CONVERTER
August 1999 Rev. 2.6
ST62T46B STMICROELECTRONICS-ST62T46B Datasheet
455Kb / 72P
   8-BIT OTP/EPROM MCU WITH LCD DRIVER, EEPROM AND A/D CONVERTER
September 1998 Rev. 2.5
ST62T80B STMICROELECTRONICS-ST62T80B Datasheet
488Kb / 78P
   8-BIT OTP/EPROM MCU WITH LCD DRIVER, EEPROM AND A/D CONVERTER
ST62T85B STMICROELECTRONICS-ST62T85B Datasheet
461Kb / 76P
   8-BIT OTP/EPROM MCU WITH LCD DRIVER, EEPROM AND A/D CONVERTER
ST62T85B STMICROELECTRONICS-ST62T85B_01 Datasheet
874Kb / 78P
   8-BIT OTP/EPROM MCU WITH LCD DRIVER, EEPROM AND A/D CONVERTER
ST62T52B STMICROELECTRONICS-ST62T52B Datasheet
745Kb / 68P
   8-BIT OTP/EPROM MCUs WITH A/D CONVERTER, AUTO-RELOAD TIMER AND EEPROM
April 1998 Rev. 2.4
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72


Datenblatt Download

Go To PDF Page


Link URL




Privatsphäre und Datenschutz
ALLDATASHEETDE.COM
War ALLDATASHEET hilfreich?  [ DONATE ] 

Über Alldatasheet   |   Werbung   |   Kontakt   |   Privatsphäre und Datenschutz   |   Linktausch   |   Hersteller
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com