Electronic Components Datasheet Search
  English  ▼

Delete All
ON OFF
ALLDATASHEET.NET

X  

Preview PDF Download HTML

BR93H46RF-2LB Datasheet(HTML) 18 Page - Rohm

Part No. BR93H46RF-2LB
Description  Serial EEPROM Series Industrial EEPROM 125℃ Operation Microwire BUS EEPROM (3-wire)
Download  28 Pages
Scroll/Zoom Zoom In 100% Zoom Out
Maker  ROHM [Rohm]
Homepage  http://www.rohm.com
Logo 

BR93H46RF-2LB Datasheet(HTML) 18 Page - Rohm

Zoom Inzoom in Zoom Outzoom out
Go To Page :
/ 28 page
background image
Datasheet
Datasheet
18/25
www.rohm.com
TSZ22111・15・001
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ02201-0R1R0G100250-1-2
BR93H46RF-2LB
27.Feb.2014 Rev.002
○Pull up Resistance Rpu and Pull-down Resistance Rpd of DO pin
As for pull up and pull down resistance value, select an appropriate value to this resistance value from microcontroller VIH,
VIL, and VOH, IOH, VOL, IOL characteristics of this IC.
○READY / BUSY Status Display (DO terminal)
This display outputs the internal status signal. When CS is started after tCS (Min.200ns)
from CS fall after write command input, “H” or “L” output.
R/B display=“L” (BUSY) = write under execution
After the timer circuit in the IC works and creates the period of tE/W, this time circuit completes automatically.
And write to the memory cell is made in the period of tE/W, and during this period, other command is not
accepted.
R/B display = “H” (READY) = command wait status
Even after tE/W (max.4ms) from write of the memory cell, the following command is accepted.
Therefore, CS=“H” in the period of tE/W, and when input is in SK, DI, malfunction may occur.
Therefore, set
DI=“L” in the area CS=“H”. (Especially, in the case of shared input port, attention is required.)
*Do not input any command while status signal is output. Command input in BUSY area is canceled, but command input in READY area is accepted.
Therefore, status READY output is canceled, and malfunction and mistake write may be made.
Figure 44. R/B Status Output Timing Chart
Figure 42. DO Pull Up Resistance
Figure 43. DO Pull Down Resistance
Microcontroller
VILM
“L” input
IOLE
VOLE
“L” output
EEPROM
Rpu
Rpu
・・・③
VOLE
VILM
・・・④
5-0.4
2.1×10-3
Rpu
2.2 [kΩ]
Rpu
Example) When VCC =5V, VOLE=0.4V, IOLE=2.1mA, VILM=0.8V,
from the equation ③,
VCC-VOLE
IOLE
With the value of Rpu to satisfy the above equation, VOLE becomes 0.4V or below,
and with VILM(=0.8V), the equation ④ is also satisfied.
Microcontroller
VIHM
“H” input
IOHE
VOHE
“H” output
EEPROM
Rpd
Rpd
48 [kΩ]
VOHE
VIHM
・・・⑥
5-0.2
0.1×10-3
Rpd
Example) When VCC =5V, VOHE=4.8V, IOHE=0.1mA,
VIHM=3.5V from the equation ⑤
Rpd
・・・⑤
VOHE
IOHE
With the value of Rpd to satisfy the above equation, VOHE becomes
4.8V or below, and with VIHM (=3.5V), the equation ⑥ is also satisfied.
・V
OLE
・I
OLE
・V
ILM
: EEPROM VOL specifications
: EEPROM IOL specifications
: Microcontroller VIL specifications
・V
OLE
・I
OLE
・V
ILM
: EEPROM VOH specifications
: EEPROM IOH specifications
: Microcontroller VIH specifications
・V
OHE
・I
OHE
・V
IHM
(DO status)
(DO status)
CS
High-Z
SK
DI
DO
CLOCK
WRITE
INSTRUCTION
READY
BUSY
STATUS
tSV


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 


Datasheet Download




Link URL



Privacy Policy
ALLDATASHEET.NET
Does ALLDATASHEET help your business so far?  [ DONATE ]  

About Alldatasheet   |   Advertisement   |   Contact us   |   Privacy Policy   |   Bookmark   |   Link Exchange   |   Manufacturer List
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