Moteur de recherche de fiches techniques de composants électroniques
  French  ▼
ALLDATASHEET.FR

X  

FM3808DK Fiches technique(PDF) 5 Page - Ramtron International Corporation

No de pièce FM3808DK
Description  256Kb Bytewide FRAM w/ Real-Time Clock
Download  28 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Fabricant  RAMTRON [Ramtron International Corporation]
Site Internet  http://www.ramtron.com
Logo RAMTRON - Ramtron International Corporation

FM3808DK Fiches technique(HTML) 5 Page - Ramtron International Corporation

  FM3808DK Datasheet HTML 1Page - Ramtron International Corporation FM3808DK Datasheet HTML 2Page - Ramtron International Corporation FM3808DK Datasheet HTML 3Page - Ramtron International Corporation FM3808DK Datasheet HTML 4Page - Ramtron International Corporation FM3808DK Datasheet HTML 5Page - Ramtron International Corporation FM3808DK Datasheet HTML 6Page - Ramtron International Corporation FM3808DK Datasheet HTML 7Page - Ramtron International Corporation FM3808DK Datasheet HTML 8Page - Ramtron International Corporation FM3808DK Datasheet HTML 9Page - Ramtron International Corporation Next Button
Zoom Inzoom in Zoom Outzoom out
 5 / 28 page
background image
FM3808
Rev 1.1
May 2003
Page 5 of 28
Address
Description
7FF8h
Control-Nonvolatile
D7
D6
D5
D4
D3
D2
D1
D0
OSCEN
Reserved
Reserved
CALS
CAL.3
CAL.2
CAL.1
CAL.0
/OSCEN
/Oscillator Enable. When set to 1, the oscillator is halted. When set to 0, the oscillator runs. Disabling
the oscillator saves battery power during storage. On a no-battery power up, this bit is set to 1. The
RTC will not run until the oscillator is enabled. Set this bit to 0 to activate the RTC.
Reserved
Do not use. Should remain set to 0.
CALS
Calibration sign. Determines if the calibration adjustment is applied as an addition to or as a subtraction
from the time-base. This bit is implemented in FRAM. Calibration is explained below
CAL.3-0
These four bits control the calibration of the clock. These bits are implemented in FRAM.
7FF7h
Watchdog Timer
D7
D6
D5
D4
D3
D2
D1
D0
WDS
WDW
WDT.5
WDT.4
WDT.3
WDT.2
WDT.1
WDT.0
WDS
Watchdog Strobe. Setting this bit to 1 reloads and restarts the watchdog timer. Setting the bit to 0 has no
affect. The bit is cleared automatically once the watchdog timer is reset. The WDS bit is write only.
Reading it always will return a 0.
/WDW
Watchdog Write Enable. Setting this bit to 1 masks the watchdog timeout value (WDT.5-0) so it cannot
be written. This allows the user to strobe the watchdog without disturbing the timeout value. Setting this
bit to 0 allows bits 5-0 to be written on the next write to the Watchdog register. The new value will be
loaded on the next internal watchdog clock after the write cycle is complete. This function is explained
in more detail in the watchdog Timer section below.
WDT.5-0
Watchdog Timeout selection. The watchdog timer interval is selected by the 6-bit value in this register.
It represents a multiplier of the 32 Hz count (31.25 ms). The minimum range or timeout value is 31.25
ms (a setting of 1) and the maximum timeout is 2 seconds (setting of 3Fh). Setting the watchdog timer
register to 0 disables the timer. These bits can be written only if the /WDW bit was cleared to 0 on a
previous cycle.
7FF6h
Interrupts
D7
D6
D5
D4
D3
D2
D1
D0
WIE
AIE
PFE
ABE
H/L
P/L
Reserved
Reserved
WIE
Watchdog Interrupt Enable. When set to 1 and a watchdog timeout occurs, the watchdog timer drives
the INT pin as well as the WDF flag. When set to 0, the watchdog timeout affects only the WDF flag.
AIE
Alarm Interrupt Enable. When set to 1, the alarm match drives the INT pin as well as the AF flag. When
set to 0, the alarm match only affects the AF flag.
PFE
Power-Fail Enable. When set to 1, the power-fail monitor drives the pin as well as the PF flag. When set
to 0, the power-fail monitor affects only the PF flag.
ABE
Alarm Battery-backup Enable. When set to 1, the alarm interrupt (as controlled by AIE) will function
even in battery backup mode. When set to 0, the alarm will occur only when VDD>VLO.
H/L
High/Low. When set to a 1, the INT pin is push/pull active high. When set to a 0, the INT pin is open
drain, active low.
P/L
Pulse/Level. When set to a 1, the INT pin is driven active (determined by H/L) by an interrupt source
for approximately 200 ms. When set to a 0, the INT pin is driven to an active level (as set by H/L) until
the Flags/Control register is read.
7FF5h
Alarm – Date of the month
D7
D6
D5
D4
D3
D2
D1
D0
M
0
10 date.1
10 date.0
Date.3
Date.2
Date.1
Date.0
Contains the alarm value for the date of the month and the mask bit to select or deselect the date value.
/M
Match. Setting this bit to 0 causes the date value to be used in the alarm match. Setting this bit to 1
causes the match circuit to ignore the date value.


Numéro de pièce similaire - FM3808DK

FabricantNo de pièceFiches techniqueDescription
logo
Ramtron International C...
FM3808DK RAMTRON-FM3808DK Datasheet
230Kb / 27P
   256Kb Bytewide FRAM w/ Real-Time Clock
More results

Description similaire - FM3808DK

FabricantNo de pièceFiches techniqueDescription
logo
Ramtron International C...
FM3808 RAMTRON-FM3808_06 Datasheet
230Kb / 27P
   256Kb Bytewide FRAM w/ Real-Time Clock
logo
List of Unclassifed Man...
FM1808 ETC-FM1808 Datasheet
89Kb / 12P
   256Kb Bytewide FRAM Memory
logo
Ramtron International C...
FM18L08 RAMTRON-FM18L08_07 Datasheet
126Kb / 13P
   256Kb Bytewide FRAM Memory
logo
List of Unclassifed Man...
FM18L08 ETC-FM18L08 Datasheet
80Kb / 11P
   256Kb 2.7-3.6V Bytewide FRAM Memory
logo
Ramtron International C...
FM1608 RAMTRON-FM1608 Datasheet
104Kb / 12P
   64Kb Bytewide FRAM Memory
logo
Dallas Semiconductor
DS1285 DALLAS-DS1285 Datasheet
21Kb / 1P
   Real Time Clock
logo
Toshiba Semiconductor
TC8521AP TOSHIBA-TC8521AP Datasheet
863Kb / 25P
   REAL TIME CLOCK ?
logo
RICOH electronics devic...
RP5C15 RICOH-RP5C15 Datasheet
137Kb / 12P
   REAL-TIME CLOCK
logo
Epson ToYoCom
RTC-63421 EPSONTOYOCOM-RTC-63421 Datasheet
413Kb / 2P
   Real time clock
logo
Golledge Electronics Lt...
RV8564C3 GOLLEDGE-RV8564C3 Datasheet
128Kb / 1P
   Real Time Clock
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


Fiches technique Télécharger

Go To PDF Page


Lien URL




Politique de confidentialité
ALLDATASHEET.FR
ALLDATASHEET vous a-t-il été utile ?  [ DONATE ] 

À propos de Alldatasheet   |   Publicité   |   Contactez-nous   |   Politique de confidentialité   |   Echange de liens   |   Fabricants
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