Rcaflga_j Lmrc High Reliability Serial EEPROMs SPI BUS Serial EEPROMs BR25□□□□family BR25L010-W series, BR25L020-W series, BR25L040-W series, BR25L080-W series, BR25L160-W series, BR25L320-W series, BR25L640-W series Lm, /.../C@R.3 Description BR25LŜŜŜ-W series is a serial EEPROM of SPI BUS interface method.
BR25L010-W, BR25L020-W, BR25L040-W, BR25L080-W, BR25L160-W, BR25L320-W, BR25L640-W Recommended action conditions Absolute maximum ratings (Ta = 25˚C) Parameter Impressed voltage Symbol VCC Permissible dissipation Pd Parameter Power source voltage Input voltage Unit V Limits -0.3 ~ +6.5 450(SOP8) *1 450(SOP-J8) *2 300(SSOP-B8) *3 Terminal voltage 310(MSOP8) *5 310(TSSOP-B8J) *6 Parameter Number of data rewrite times Data hold years – Limits 1.8 ~ 5.5 0 ~ VCC Unit V *1 *1 Min.
Technical Note BR25L010-W, BR25L020-W, BR25L040-W, BR25L080-W, BR25L160-W, BR25L320-W, BR25L640-W Pin assignment and description VCC HOLD SCK Terminal name Input/output BR25L010-W BR25L020-W BR25L040-W BR25L080-W BR25L160-W BR25L320-W BR25L640-W CS SO WP – – VCC SI GND Function Power source to be connected GND CS SCK SI SO Input Input Input Output HOLD Input WP Input All input / output reference voltage, 0V Chip select input Serial clock input Start bit, ope code, address, and serial data
Technical Note BR25L010-W, BR25L020-W, BR25L040-W, BR25L080-W, BR25L160-W, BR25L320-W, BR25L640-W 6 6 5 5 4 4 SPEC 3 1 0.8 0.6 Ta=85˚C 3 VOL[V] VIL[V] VIH[V] Characteristic data (The following characteristic data are Typ. values.) Ta=25˚C Ta=-40˚C Ta=85˚C Ta=25˚C 0.4 2 2 SPEC Ta=85˚C Ta=25˚C 1 0.2 1 Ta=-40˚C 0 0 SPEC Ta=-40˚C 0 0 1 2 3 VCC[V] 4 5 0 6 Fig.6 "H" input voltage VIH(CS,SCK,SI,HOLD,WP) 1 2 3 VCC[V] 4 5 0 6 2 3 4 5 IOL[mA] Fig.
Technical Note BR25L010-W, BR25L020-W, BR25L040-W, BR25L080-W, BR25L160-W, BR25L320-W, BR25L640-W 250 60 250 SPEC SPEC 200 SPEC 200 40 150 20 SPEC 100 50 tDIS[ns] tCSH[ns] tCSS[ns] 150 100 SPEC 50 Ta=85˚C Ta=25˚C SPEC 0 Ta=85˚C Ta=25˚C Ta= -40˚C 0 Ta=85˚C -20 Ta= -40˚C Ta= -40˚C Ta=25˚C -50 -40 0 0 1 2 3 VCC[V] 4 5 0 6 1 Fig.21 CS setup time tCSS 2 3 VCC[V] 4 5 0 6 1 Fig.22 CS hold time tCSH 3 VCC[V] 4 5 6 5 6 Fig.
BR25L010-W, BR25L020-W, BR25L040-W, BR25L080-W, BR25L160-W, BR25L320-W, BR25L640-W Technical Note Features Status registers This IC has status registers. The status registers are of 8 bits and express the following parameters. BP0 and BP1 can be set by write status register command. These 2 bits are memorized into the EEPROM, therefore are valid even when power source is turned off. Rewrite characteristics and data hold time are same as characteristics of the EEPROM.
BR25L010-W, BR25L020-W, BR25L040-W, BR25L080-W, BR25L160-W, BR25L320-W, BR25L640-W Technical Note Command mode Ope code Contents Command BR25L010-W BR25L020-W BR25L040-W BR25L080-W BR25L160-W BR25L320-W BR25L640-W * 110 0000 0110 WREN Write enable Write enable command 0000 * 110 0000 WRDI Write disable Write disable command 0000 * 100 0000 * 100 0000 0100 READ Read Read command 0000 * 011 0000 A8011 0000 0011 WRITE Write Write command 0000 * 010 0000 A8010 0000 0010
BR25L010-W, BR25L020-W, BR25L040-W, BR25L080-W, BR25L160-W, BR25L320-W, BR25L640-W Technical Note 2. Read command (READ) CS SCK 0 0 SI SO 1 0 2 3 0 4 5 *1 0 6 0 7 1 8 A7 1 9 10 A5 A6 11 14 A4 A1 15 16 17 22 A0 High-Z D7 D2 D6 D1 D0 Product number Address length BR25L010-W A6-A0 BR25L020-W A7-A0 BR25L040-W A8-A0 Product number Address length BR25L080-W A9-A0 Fig.
BR25L010-W, BR25L020-W, BR25L040-W, BR25L080-W, BR25L160-W, BR25L320-W, BR25L640-W Technical Note 4. Status register write / read command CS 0 SCK 0 SI SO 1 2 0 3 0 4 5 * 0 6 7 0 0 1 8 9 10 11 bit7 bit6 bit5 bit4 * * * * 12 bit3 13 bit2 BP1 BP0 14 15 bit1 bit0 * * High-Z * =Don't care Fig.
BR25L010-W, BR25L020-W, BR25L040-W, BR25L080-W, BR25L160-W, BR25L320-W, BR25L640-W Technical Note At standby Current at standby Set CS "H", and be sure to set SCK, SI, WP, HOLD input "L" or "H". Do not input intermediate electric potential. Timing As shown in Fig. 45, at standby, when SCK is "H", even if CS is fallen, SI status is not read at fall edge. SI status is read at SCK rise edge after fall of CS. At standby and at power ON/OFF, set CS "H" status.
Technical Note BR25L010-W, BR25L020-W, BR25L040-W, BR25L080-W, BR25L160-W, BR25L320-W, BR25L640-W Method to cancel each command READ ¢ Method to cancel : cancel by CS = "H" Ope code Address Data 8 bits 8 bits /16bits 8 bits Cancel available in all areas of read mode Fig.48 READ cancel valid timing RDSR ¢ Method to cancel : cancel by CS = "H" Ope code Data 8 bits 8 bits Cancel available in all areas of read mode Fig.
BR25L010-W, BR25L020-W, BR25L040-W, BR25L080-W, BR25L160-W, BR25L320-W, BR25L640-W Technical Note High speed operation In order to realize stable high speed operations, pay attention to the following input / output pin conditions. Input pin pull up, pull down resistance When to attach pull up, pull down resistance to EEPROM input pin, select an appropriate value for the microcontroller VOL, IOL from VIL characteristics of this IC.
BR25L010-W, BR25L020-W, BR25L040-W, BR25L080-W, BR25L160-W, BR25L320-W, BR25L640-W Technical Note In order to realize more stable high speed operation, it is recommended to make the values of RPU, RPD as large as possible, and make the amplitude of signal input to EEPROM close to the amplitude of VCC / GND level. (*1 At this moment, operating timing guaranteed value is guaranteed.) tPD-VIL characteristics 80 tPD [ns] 75 70 65 VCC=1.8V Ta =25°C VIH=VCC CL=100pF 60 55 0 0.2 0.4 0.6 0.
BR25L010-W, BR25L020-W, BR25L040-W, BR25L080-W, BR25L160-W, BR25L320-W, BR25L640-W Technical Note Equivalent circuit Output circuit SO OEint. Fig.57 SO output equivalent circuit Input circuit RESETint. CS Fig.58 CS input equivalent circuit SCK SI Fig.59 SCK input equivalent circuit Fig.60 SI input equivalent circuit WP HOLD Fig.61 HOLD input equivalent circuit www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. Fig.62 WP input equivalent circuit 14/16 2010.07 - Rev.
BR25L010-W, BR25L020-W, BR25L040-W, BR25L080-W, BR25L160-W, BR25L320-W, BR25L640-W Technical Note Notes on power ON/OFF At power ON/OFF, set CS "H" (= V CC). When CS is "L", this IC gets in input accept status (active). If power is turned on in this status, noises and the likes may cause malfunction, mistake write or so. To prevent these, at power ON, set CS "H". (When CS is in "H" status, all inputs are canceled.) Vcc Vcc GND Vcc CS GND Good example Bad example Fig.
Technical Note BR25L010-W, BR25L020-W, BR25L040-W, BR25L080-W, BR25L160-W, BR25L320-W, BR25L640-W Selection of order type B R 2 5 L 0 1 0 F E 2 - W Package type Double cell Rohm type name BUS type Operating temperature Capacity 25: SPI 010=1 K 020=2 K 040=4 K 080=8 K 160=16K 320=32K 640=64K Package specifications Package specifications E2 : reel shape emboss taping TR : reel shape emboss taping (MSOP8 package only) F : SOP8 FJ : SOP-J8 FV : SSOP-B8 FV :TSSOP-B8 FVM : MSOP8 FVJ :TSSOP-B8J SOP8
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