Datasheet
Serial EEPROM Series Standard EEPROM
WLCSP EEPROM
BRCB008GWZ-3
General Description
BRCB008GWZ-3 is a serial EEPROM of I2C BUS Interface Method
Package W (Typ) x D(Typ) x H(Max)
Features
Completely conforming to the world standard I2C BUS.
All controls available by 2 ports of serial clock (SCL)
and serial data (SDA)
1.7V to 3.6V Single Power Source Operation most
suitable for battery use
1.7V to 3.6V wide limit of operating voltage, possible
FAST MODE 400KHz operation
16byte Page Write Mode useful for initial value write
at factory shipment
Self-timed Programming Cycle
Low Current Consumption
Prevention of Write Mistake at Low Voltage
More than 1 million write cycles
More than 40 years data retention
Noise Filter Built in SCL / SDA terminal
Initial delivery state FFh
UCSP30L1
0.94mm x 0.94mm x 0.33mm
BRCB008GUZ-3
Capacity
Bit Format
Type
Power Source Voltage
Package
8Kbit
1K×8
BRCB008GWZ-3
1.7V to 3.6V
UCSP30L1
○Product structure：Silicon monolithic integrated circuit
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Datasheet
BRCB008GWZ-3
Absolute Maximum Ratings (Ta=25°C)
Parameter
Symbol
Rating
Unit
Supply Voltage
VCC
-0.3 to +6.5
V
Power Dissipation
Pd
220 (UCSP30L1)
mW
Storage Temperature
Tstg
-65 to +125
°C
Operating Temperature
Topr
-40 to +85
°C
‐
-0.3 to Vcc+1.0
V
Tjmax
150
°C
Input Voltage/
Output Voltage
Junction Temperature
Remark
Derate by 2.2mW/°C when operating above Ta=25°C
The Max value of Input Voltage / Output Voltage is not over 6.5V.
When the pulse width is 50ns or less, the Min value of Input Voltage
/ Output Voltage is not lower than 1.0V.
Junction temperature at the storage condition
Memory Cell Characteristics (Ta=25℃, Vcc=1.7V to 3.6V)
Limit
Parameter
Unit
Write Cycles (1)
Min
Typ
Max
1,000,000
-
-
Times
40
-
-
Years
Data Retention (1)
(1)Not 100% TESTED
Recommended Operating Ratings
Parameter
Symbol
Rating
Power Source Voltage
Vcc
1.7 to 3.6
Input Voltage
VIN
0 to Vcc
Unit
V
DC Characteristics (Unless otherwise specified, Ta=-40℃ to +85℃, Vcc=1.7V to 3.6V)
Limit
Parameter
Symbol
Unit
Min
Typ
Max
Conditions
Input High Voltage
VIH
0.7Vcc
-
Vcc+1.0
V
1.7V≦Vcc≦3.6V
Input Low Voltage
VIL
-0.3(2)
-
+0.3Vcc
V
1.7V≦Vcc≦3.6V
Output Low Voltage1
VOL1
-
-
0.4
V
IOL=3.0mA, 2.5V≦Vcc≦3.6V (SDA)
Output Low Voltage2
VOL2
-
-
0.2
V
IOL=0.7mA, 1.7V≦Vcc＜2.5V (SDA)
Input Leakage Current
ILI
-1
-
+1
µA
VIN=0 to Vcc
Output Leakage Current
ILO
-1
-
+1
µA
VOUT=0 to Vcc (SDA)
Supply Current (Write)
ICC1
-
-
2.0
mA
Supply Current (Read)
ICC2
-
-
0.5
mA
Standby Current
ISB
-
-
2.0
µA
Vcc=3.6V, fSCL=400kHz, tWR=5ms,
Byte Write, Page Write
Vcc=3.6V, fSCL=400kHz
Random Read, Current Read, Sequential
Read
Vcc=3.6V, SDA・SCL=Vcc
(2) When the pulse width is 50ns or less, it is -1.0V.
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Datasheet
BRCB008GWZ-3
AC Characteristics (Unless otherwise specified, Ta=-40℃ to +85℃, Vcc=1.7V to 3.6V)
Parameter
Limit
Symbol
Min
Typ
Max
Unit
Clock Frequency
fSCL
-
-
400
kHz
Data Clock High Period
tHIGH
0.6
-
-
µs
tLOW
1.2
-
-
µs
Data Clock Low Period
SDA and SCL Rise Time
(1)
tR
-
-
0.3
µs
SDA and SCL Fall Time (1)
tF
-
-
0.3
µs
Start Condition Hold Time
tHD:STA
0.6
-
-
µs
Start Condition Setup Time
tSU:STA
0.6
-
-
µs
Input Data Hold Time
tHD:DAT
0
-
-
ns
Input Data Setup Time
tSU:DAT
100
-
-
ns
tPD
0.1
-
0.9
µs
Output Data Delay Time
Output Data Hold Time
tDH
0.1
-
-
µs
tSU:STO
0.6
-
-
µs
Bus Free Time
tBUF
1.2
-
-
µs
Write Cycle Time
tWR
-
-
5
ms
tI
-
-
0.1
µs
Stop Condition Setup Time
Noise Spike Width (SDA and SCL)
(1) Not 100% TESTED.
Condition Input Data Level: VIL=0.2×Vcc VIH=0.8×Vcc
Input Data Timing Reference Level: 0.3×Vcc/0.7×Vcc
Output Data Timing Reference Level: 0.3×Vcc/0.7×Vcc
Rise/Fall Time: ≦20ns
Serial Input / Output Timing
tR
tF
SCL
tHIGH
70%
70% 70%
30%
70%
30%
30%
30%
tLOW
tHD:DAT
tSU:DAT
70%
SDA
(input)
70%
70%
70%
30%
tPD
tBUF
SDA
(output)
tDH
70%
70%
30%
30%
○Input Read at the rise edge of SCL
○Data Output in sync with the fall of SCL
Figure 1-(a). Serial Input / Output Timing
70%
70%
70%
SCL
tSU:STA
SDA
(input)
tHD:STA
tSU:STO
70%
30%
30%
STOP CONDITION
START CONDITION
Figure 1-(b). Start-Stop Bit Timing
SCL
SDA
(input)
D0
write data
(n-th address)
ACK
70%
70%
tWR
STOP CONDITION
START CONDITION
Figure 1-(c). Write Cycle Timing
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Datasheet
BRCB008GWZ-3
Block Diagram
8Kbit
EE P ROM
GN D
A RRA Y
Vc c
VCC
8bit
10bit
A DDRES S
10bit
DE CO DER
SLA VE W ORD
DAT A
ADDRE S S RE G IS TE R
REG IST ER
ST ART
C ONTRO L
ST O P
SCL
LO G IC
AC K
HIG H VO LTA GE GE N .
SDA
VCC LE V EL DE TE CT
Figure 2. Block Diagram
Pin Configuration
B
○
○
SCL
SDA
A
○
○
VCC GND
B1
B2
A1
A2
1
2
BOTTOM VIEW
Pin Descriptions
Land No. Terminal Name
Input / Output
Descriptions
Slave and word address
Serial data input and serial data output
B2
SDA
Input / Output
B1
SCL
Input
A2
GND
-
Reference voltage of all input / output
A1
VCC
-
Power supply
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Serial clock input
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Datasheet
BRCB008GWZ-3
Typical Performance Curves
6
6
Ta=-40 ℃
Ta= 25℃
Ta= 85℃
Ta=-40 ℃
Ta= 25℃
Ta= 85℃
5
Input Low Voltage: VIL(V)
Input High Voltage: VIH(V)
5
4
3
SPEC
2
1
4
3
2
1
SPEC
0
0
0
1
2
3
4
5
6
0
1
2
Supply Voltage: Vcc(v)
4
5
6
Supply Voltage: Vcc(v)
Figure 4. Input Low Voltage vs Supply Voltage
(SCL,SDA)
Figure 3. Input High Voltage vs Supply Voltage
(SCL,SDA)
1
0.6
Output Low Voltage2 : VOL2(V)
Ta=-40 ℃
Ta= 25℃
Ta= 85℃
0.5
Output Low Voltage1 : VOL1(V)
3
0.4
SPEC
0.3
0.2
0.1
Ta=-40℃
Ta= 25℃
Ta= 85℃
0.8
0.6
0.4
SPEC
0.2
0
0
0
1
2
3
4
5
6
7
0
8
2
3
4
5
6
Output Low Current : IOL(mA)
Output Low Current : IOL(mA)
Figure 6. Output Low Voltage2 vs Output Low Current
(Vcc=1.7V)
Figure 5. Output Low Voltage1 vs Output Low Current
(Vcc=2.5V)
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BRCB008GWZ-3
Typical Performance Curves‐continued
1.2
1.2
SPEC
Output Leakage Current : ILO(uA)
Input Leakage Current : ILI(uA)
1
0.8
Ta=-40℃
Ta= 25℃
Ta= 85℃
0.6
0.4
0.2
SPEC
1
0.8
Ta=-40℃
Ta= 25℃
Ta= 85℃
0.6
0.4
0.2
0
0
0
1
2
3
4
5
0
6
1
2
4
5
6
Figure 8. Output Leakage Current vs Supply Voltage
(SDA)
Figure 7. Input Leakage Current vs Supply Voltage
(SCL)
2.5
0.6
Supply Current (Read) : Icc2(mA)
SPEC
Supply Current (Write) : Icc1(mA)
3
Supply Voltage : Vcc(V)
Supply Voltage : Vcc(V)
2
Ta=-40℃
Ta= 25℃
Ta= 85℃
1.5
1
0.5
0
SPEC
0.5
0.4
Ta=-40℃
Ta= 25℃
Ta= 85℃
0.3
0.2
0.1
0
0
1
2
3
4
5
6
0
Supply Voltage : Vcc(V)
2
3
4
Supply Voltage : Vcc(V)
5
Figure 10. Supply Current (Read) vs Supply Voltage
(fSCL=400kHz)
Figure 9. Supply Current (Write) vs Supply Voltage
(fSCL=400kHz)
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6
Datasheet
BRCB008GWZ-3
Typical Performance Curves‐continued
10000
2.5
SPEC
1000
Clock Frequency : fscl（kHZ）
Standby Current : ISB(uA)
2
1.5
1
Ta=-40℃
Ta= 25℃
Ta= 85℃
0.5
SPEC
100
10
Ta=-40℃
Ta= 25 ℃
Ta= 85 ℃
1
0.1
0
0
1
2
3
4
5
0
6
1
3
4
5
6
Supply Voltage : Vcc(V)
Supply Voltage : Vcc(V)
Figure 12. Clock Frequency vs Supply Voltage
Figure.11 Standby Current vs Supply Voltage
5
6
5
Ta=-40℃
Ta= 25℃
Ta= 85℃
4
Data Clock Low Period : tLOW(us)
Data Clock High Period : tHIGH(uA)
2
3
2
1
4
Ta=-40℃
Ta= 25℃
Ta= 85℃
3
2
SPEC
1
SPEC
0
0
0
1
2
3
4
5
0
6
2
3
4
5
6
Supply Voltage: Vcc(V)
Supply Voltage: Vcc(V)
Figure 14. Data Clock Low Period vs Supply Voltage
Figure 13. Data Clock High Period vs Supply Voltage
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Datasheet
BRCB008GWZ-3
Typical Performance Curves‐continued
0.7
Start Condition Setup Time : t SU:STA(us)
Start Condition Hold Time : t HD : STA(us)
6
5
Ta=-40℃
Ta= 25℃
Ta= 85℃
4
3
2
1
SPEC
0.6
SPEC
0.5
0.4
0.3
Ta=-40℃
Ta= 25℃
Ta= 85℃
0.2
0.1
0
-0.1
0
0
1
2
3
4
5
0
6
1
3
4
5
6
Supply Voltage : Vcc(V)
Supply Voltage: Vcc(V)
Figure 15. Start Condition Hold Time vs Supply Voltage
Figure 16. Start Condition Setup Time vs Supply Voltage
300
50
SPEC
0
Input Data Setup Time : t SU: DAT(ns)
Input Data Hold Time : t HD: DAT(ns)
2
-50
-100
Ta=-40℃
Ta= 25℃
Ta= 85℃
-150
200
SPEC
100
0
Ta=-40℃
Ta= 25℃
Ta= 85℃
-100
-200
-200
0
1
2
3
4
5
0
6
2
3
4
5
6
Supply Voltage: Vcc(V)
Supply Voltage: Vcc(V)
Figure 17. Input Data Hold Time vs Supply Voltage
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Figure 18. Input Data Setup Time vs Supply Voltage
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Datasheet
BRCB008GWZ-3
Typical Performance Curves‐continued
4
Ta=-40℃
Ta= 25℃
Ta= 85℃
3
Output Data Delay Time : tPD(us)
Output Data Delay Time : tPD(us)
4
2
SPEC
1
0
Ta=-40℃
Ta= 25℃
Ta= 85℃
3
2
SPEC
1
0
0
1
2
3
4
5
6
0
1
Supply Voltage: Vcc(V)
3
4
5
6
Supply Voltage: Vcc(V)
Figure 20. Output Data Delay Time vs Supply Voltage
(HIGH)
Figure 19. Output Data Delay Time vs Supply Voltage
(LOW)
2
5
Ta=-40℃
Ta= 25℃
Ta= 85℃
1.5
Ta=-40℃
Ta= 25℃
Ta= 85℃
4
Bus Free Time : t BUF(us)
Stop Condition Setup Time : tsu: STO(us)
2
1
SPEC
0.5
0
3
2
SPEC
1
-0.5
0
0
1
2
3
4
5
6
0
Supply Voltage: Vcc(V)
2
3
4
5
6
Supply Voltage: Vcc(V)
Figure 21. Stop Condition Setup Time vs Supply Voltage
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Figure 22. Bus Free Time vs Supply Voltage
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Datasheet
BRCB008GWZ-3
Typical Performance Curves‐continued
1
SPEC
5
Write Cycle Time : tWR(ms)
Noise Spike Width (SCL HIGH ） : t l (us)
6
4
3
Ta=-40℃
Ta= 25℃
Ta= 85℃
2
1
0.8
Ta=-40℃
Ta= 25℃
Ta= 85℃
0.6
0.4
0.2
SPEC
0
0
0
1
2
3
4
5
0
6
1
2
3
4
5
6
Supply Voltage : Vcc(V)
Supply Voltage: Vcc(V)
Figure 24. Noise Spike Width vs Supply Voltage
(SCL HIGH）
Figure 23. Write Cycle Time vs Supply Voltage
Noise Spike Width(SDA HIGH) : t l(us)
0.6
0.5
Ta=-40 ℃
Ta= 25℃
Ta= 85℃
0.4
0.3
0.2
SPEC
0.1
0
0
2
4
6
Supply Voltage: Vcc(V)
Figure 25. Noise Spike Width vs Supply Voltage
(SDA HIGH）
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Datasheet
BRCB008GWZ-3
Timing Chart
1. I2C BUS Data Communication
I2C BUS data communication starts by start condition input, and ends by stop condition input. Data is always 8bit long,
2
and acknowledge is always required after each byte. I C BUS data communication with several devices is possible by
connecting with 2 communication lines; serial data (SDA) and serial clock (SCL).
Among the devices, there should be a “master” that generates clock and control communication start and end. The rest
become “slave” which is controlled by an address peculiar to each device like this EEPROM. The device that outputs
data to the bus during data communication is called “transmitter”, and the device that receives data is called “receiver”.
SDA
1-7
SCL
S
START ADDRESS
condition
1-7
8
9
R/W
ACK
8
DATA
9
1-7
ACK
8
9
DATA
ACK
P
STOP
condition
Figure 26. Data Transfer Timing
2. Start Condition (Start Bit Recognition)
(1) Before executing each command, start condition (start bit) where SDA goes from 'HIGH' down to 'LOW' when SCL
is 'HIGH' is necessary.
(2) This IC always detects whether SDA and SCL are in start condition (start bit) or not, therefore, unless this condition
is satisfied, any command cannot be executed.
3. Stop Condition (Stop Bit Recognition)
(1) Each command can be ended by a stop condition (stop bit) where SDA goes from 'LOW' to 'HIGH' while SCL is
'HIGH'.
4. Acknowledge (ACK) Signal
(1) This acknowledge (ACK) signal is a software rule to show whether data transfer has been made normally or not. In
a master and slave communication, the device (Ex. µ-COM sends slave address input for write or read command
to this IC) at the transmitter (sending) side releases the bus after output of 8bit data.
(2) The device (Ex. This IC receives the slave address input for write or read command from the µ-COM) at the
receiver (receiving) side sets SDA 'LOW' during the 9th clock cycle, and outputs acknowledge signal (ACK signal)
showing that it has received the 8bit data.
(3) This IC, after recognizing start condition and slave address (8bit), outputs acknowledge signal (ACK signal) 'LOW'.
(4) After receiving 8bit data (word address and write data) during each write operation, this IC outputs acknowledge
signal (ACK signal) 'LOW'.
(5) During read operation, this IC outputs 8bit data (read data), and detects acknowledge signal (ACK signal) 'LOW'.
When acknowledge signal (ACK signal) is detected, and stop condition is not sent from the master (µ-COM) side,
this IC continues to output data. When acknowledge signal (ACK signal) is not detected, this IC stops data transfer,
recognizes stop condition (stop bit), and ends read operation. Then this IC becomes ready for another
transmission.
5. Device Addressing
(1) Slave address comes after start condition from master.
(2) The significant 4 bits of slave address are used for recognizing a device type.
The device code of this IC is fixed to '1010'.
(3) Next slave addresses (P1, P0 --- page select) are for selecting page addresses.
(4) The most insignificant bit ( R / W --- READ / WRITE ) of slave address is used for designating write or read
operation, and is as shown below.
Setting R / W to 0 ------- write (setting 0 to word address setting of random read)
Setting R / W to 1 ------- read
Type
BRCB008GWZ-3
Slave Address
1 0 1
0
＊
P1 P0
――
R/W
＊ don’t care
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Datasheet
BRCB008GWZ-3
Write Command
1. Write Cycle
(1) Arbitrary data can be written to this EEPROM. When writing only 1 byte, Byte Write is normally used, and when
writing continuous data of 2 bytes or more, simultaneous write is possible by Page Write Cycle. Up to 16 arbitrary
bytes can be written.
S
T
A
R
T
SDA
LINE
W
R
I
T
E
SLAVE
ADDRESS
WORD
ADDRESS
WA
7
1 0 1 0 *1 P1 P0
S
T
O
P
DATA
WA
0
D7
Don't care.
*1
Don't care.
D0
A
C
K
R A
/ C
W K
*1
A
C
K
Figure 27. Byte Write Cycle
S
T
A
R
T
SDA
LINE
W
R
I
T
E
SLAVE
ADDRESS
1 0 1
0
WORD
ADDRESS(n)
WA
0
WA
7
*1 P1 P0
DATA(n)
R A
/ C
W K
D7
DATA(n+15)
D0
D0
A
C
K
A
C
K
S
T
O
P
A
C
K
Figure 28. Page Write Cycle
(2)
(3)
(4)
(5)
(6)
During internal write execution, all input commands are ignored, therefore ACK is not returned.
Data is written to the address designated by word address (n-th address)
By issuing stop bit after 8bit data input, internal write to memory cell starts.
When internal write is started, command is not accepted for tWR (5ms at maximum).
Using page write cycle, writing in bulk is done as follows: When data of more than 16 bytes is sent, the byte in
excess overwrites the data already sent first.
(Refer to "Internal address increment".)
(7) As for Page Write Command, where 2 or more bytes of data is intended to be written, after page select bit ‘P0,P1’
of slave address are designated arbitrarily, only the value of 4 least significant bits in the address is incremented
internally, so that data up to 32 addresses of memory only can be written.
2. Notes on Page Write Cycle
1 page=16bytes, but the page
Write Cycle Time is 5ms at maximum for 16byte bulk write.
It does not stand 5ms at maximum × 16byte=80ms(Max)
3. Internal Address Increment
Page Write Mode
0Eh
WA7
WA4
WA3
WA2
WA1
WA0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
1
0
0
0
0
0
0
0
1
1
0
1
1
0
1
1
0
0
1
0
Significant bit is fixed.
No digit up
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Increment
For example, when it is started from address 0Eh,
then, increment is made as below,
0Eh→0Fh→00h→01h･･･ please take note.
※0Eh･･･0E in hexadecimal, therefore,
00001110 becomes a binary number.
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Datasheet
BRCB008GWZ-3
Read Command
1. Read Cycle
Read cycle is when data of EEPROM is read. Read cycle could be random read cycle or current read cycle. Random
read cycle is a command to read data by designating a specific address, and is used generally. Current read cycle is a
command to read data of internal address register without designating an address, and is used when to verify just after
write cycle. In both the read cycles, sequential read cycle is available where and the next address data can be read in
succession.
S
T
A
R
T
SDA
LINE
SLAVE
ADDRESS
W
R
I
T
E
S
T
A
R
T
WORD
ADDRESS(n)
WA
7
1 0 1 0 *1 P1P0
S
T
O
P
DATA(n)
*1
WA
0
RA
/ C
WK
R
E
A
D
SLAVE
ADDRESS
1 0 1 0 A2A1A0
A
C
K
R A
/ C
WK
A
C
K
Don’t care.
D0
D7
Figure 29. Random Read Cycle
S
T
A
R
T
SDA
LINE
SLAVE
ADDRESS
R
E
A
D
1 0 1 0 *1P1P0
S
T
O
P
DATA(n)
D7
D0
A
C
K
R A
/ C
WK
Figure 30. Current Read Cycle
S
T
A
R
T
SDA
LINE
SLAVE
ADDRESS
R
E
A
D
1 0 1 0 *1 P1P0
DATA(n)
D7
R A
/ C
W K
S
T
O
P
DATA(n+x)
D7
D0
A
C
K
A
C
K
D0
A
C
K
Figure 31. Sequential Read Cycle (in the case of Current Read Cycle)
(1) In Random Read Cycle, data of designated word address can be read.
(2) When the command just before Current Read Cycle is Random Read Cycle, Current Read Cycle (each including
Sequential Read Cycle), data of incremented last read address (n)-th, i.e., data of the (n+1)-th address is output.
(3) When ACK signal 'LOW' after D0 is detected, and stop condition is not sent from master (µ-COM) side, the next
address data can be read in succession.
(4) Read cycle is ended by stop condition where 'H' is input to ACK signal after D0 and SDA signal goes from ‘L’ to ‘H’
while SCL signal is 'H' .
(5) When 'H' is not input to ACK signal after D0, sequential read gets in, and the next data is output.
Therefore, read command cycle cannot be ended. To end the read command cycle, be sure to input 'H' to ACK signal
after D0, and the stop condition where SDA goes from ‘L’ to ‘H’ while SCL signal is 'H'.
(6) Sequential Read is ended by stop condition where 'H' is input to ACK signal after arbitrary D0 and SDA is asserted
from ‘L’ to ‘H’ while SCL signal is 'H'.
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Prohibition Command
This command is Test Mode Command. (Figure 32.)
If this device receives this command by error, it becomes Test Mode and may cause erroneous operation in system.
To assure the operation, never send the following command.
The release condition of Test Mode is only power down.
SCL
SDA
1
0
1
1
Start Condition
Figure 32. Prohibition Command
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Software Reset
Software reset is executed to avoid malfunction after power on and during command input. Software reset has several
kinds and 3 kinds of them are shown in the figure below. (Refer to Figure 33-(a), Figure 33-(b), and Figure 33-(c).) Within
the dummy clock input area, the SDA bus is released ('H' by pull up) and ACK output and read data '0' (both 'L' level) may
be output from EEPROM. Therefore, if 'H' is input forcibly, output may conflict and over current may flow, leading to
instantaneous power failure of system power source or influence upon devices.
Dummy clock×14
SCL
1
2
Start×2
13
Normal command
14
SDA
Normal command
Figure 33-(a). The case of dummy clock×14 + START+START+ command input
SCL
Start
Dummy clock×9
Start
1
2
8
Normal command
9
SDA
Normal command
Figure 33-(b). The case of START + dummy clock×9 + START + command input
Start×9
SCL
1
2
3
7
8
Normal command
9
SDA
Normal command
Figure 33-(c). START×9 + command input
※Start command from START input.
Acknowledge Polling
During internal write execution, all input commands are ignored, therefore ACK is not returned. During internal automatic
write execution after write cycle input, next command (slave address) is sent. If the first ACK signal sends back 'L', then it
means end of write operation, else 'H' is returned, which means writing is still in progress. By the use of acknowledge
polling, next command can be executed without waiting for tWR = 5ms.
To write continuously, R / W = 0, then to carry out current read cycle after write, slave address with R / W = 1 is sent, and if
ACK signal sends back 'L', then execute word address input and data output and so forth.
During Internal Write,
ACK = HIGH is returned.
First Write Command
S
T
A
R
T
Write Command
S
T
O
P
S
T Slave
A
R Address
T
S
T
A
R
T
A
C
K
H
Slave
Address
A
C
K
H
…
tWR
Second write command
…
S
T Slave
A
R Address
T
A
C
K
H
S
T Slave
A
R Address
T
A
C
K
L
Word
Address
A
C
K
L
Data
A
C
K
L
S
T
O
P
tWR
After completion of internal write,
ACK=LOW is sent back, so input
next word address and data in
succession.
Figure 34. Case of continuous write by Acknowledge Polling
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Command Cancel by Start Condition and Stop Condition
During command input, by continuously inputting start condition and stop condition, command can be cancelled. (Figure 35)
However, within ACK output area and during data read, SDA bus may output 'L'. In this case, start condition and stop
condition cannot be input, so reset is not available. Therefore, execute software reset. When command is cancelled by start,
stop condition, during random read cycle, sequential read cycle, or current read cycle, internal setting address is not
determined. Therefore, it is not possible to carry out current read cycle in succession. To carry out read cycle in succession,
carry out random read cycle.
SCL
SDA
1
0
1
0
Start condition
Stop condition
Figure 35. Case of Cancel by Start, Stop Condition during Slave Address Input
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I/O Peripheral Circuit
1. Pull-up Resistance of SDA terminal
SDA is NMOS open drain, so it requires a pull up resistor. As for this resistance value (RPU), select an appropriate value
from microcontroller VIL, IL, and VOL-IOL characteristics of this IC. If RPU is large, operating frequency is limited. The smaller
the RPU, the larger is the supply current (Read).
2. Maximum Value of RPU
The maximum value of RPU is determined by the following factors.
(1) SDA rise time to be determined by the capacitance (CBUS) of bus line and RPU of SDA should be tR or lower.
Furthermore, AC timing should be satisfied even when SDA rise time is slow.
A to be determined by the input current leak total (IL) of the device connected to the bus
(2)The bus electric potential ○
with output of 'H' to the SDA line and RPU should sufficiently secure the input 'H' level (VIH) of microcontroller and
EEPROM including recommended noise margin of 0.2Vcc.
VCC-ILRPU-0.2 VCC ≧ VIH
∴
RPU≦
0.8Vcc-VIH
IL
Microcontroller
BRCB008GWZ-3
RPU
Ex.) Vcc =3V IL=10µA VIH=0.7 Vcc
From(2)
0.8×3-0.7×3
RPU≦
-6
10×10
SDA terminal
A
IL
IL
≦ 30 [kΩ]
Bus line
Capacity
CBUS
Figure 36. I/O Circuit Diagram
3.
Minimum Value of RPU
The minimum value of RPU is determined by the following factors:
(1)When IC outputs LOW, it should be satisfied that VOLMAX=0.4V and IOLMAX=3mA.
Vcc-VOL
RPU ≦IOL
Vcc-VOL
∴ RPU≧
IOL
(2)VOLMAX=0.4V should secure the input 'L' level (VIL) of microcontroller and EEPROM
including the recommended noise margin of 0.1Vcc.
VOLMAX ≦ VIL-0.1 VCC
Ex.) VCC =3V, VOL=0.4V, IOL=3mA, microcontroller, EEPROM VIL=0.3Vcc
from(1)
3-0.4
RPU≧ 3×10-3
≧
And
867[Ω]
VOL=0.4［V］
VIL=0.3×3
=0.9［V］
Therefore, the condition (2) is satisfied.
4. Pull-up Resistance of SCL Terminal
When SCL control is made at the CMOS output port, there is no need for a pull up resistor. But when there is a time
where SCL becomes 'Hi-Z', add a pull up resistor. As for the pull up resistor value, one of several kΩ to several ten kΩ
is recommended in consideration of drive performance of output port of microcontroller.
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Cautions on Microcontroller Connection
1.
RS
In I2C BUS, it is recommended that SDA port is of open drain input/output. However, when using CMOS input / output of
tri state to SDA port, insert a series resistance Rs between the pull up resistor Rpu and the SDA terminal of EEPROM.
This is to control over current that may occur when PMOS of the microcontroller and NMOS of EEPROM are turned ON
simultaneously. RS also plays the role of protecting the SDA terminal against surge. Therefore, even when SDA port is
open drain input/output, RS can be used.
ACK
SCL
RPU
RS
SDA
'H' output of microcontroller
'L' output of EEPROM
Microcontroller
EEPROM
Over current flows to SDA line by 'H'
output of microcontroller and 'L'
output of EEPROM.
Figure 37. I/O Circuit Diagram
Figure 38. Input / Output Collision Timing
2. Maximum Value of RS
The maximum value of Rs is determined by the following relations.
(1) SDA rise time to be determined by the capacitance (CBUS) of bus line and RPU of SDA should be tR or lower.
Furthermore, AC timing should be satisfied even when SDA rise time is slow.
(2) The bus electric potential ○
A to be determined by RPU and RS the moment when EEPROM outputs 'L' to SDA bus
should sufficiently secure the input 'L' level (VIL) of microcontroller including recommended noise margin of 0.1Vcc.
(Vcc-VOL)×RS
+VOL+0.1Vcc≦VIL
RPU+RS
VCC
RPU A
RS
∴
RS≦
VOL
Ex)VCC=3V
IOL
Bus line
capacity
CBUS
VIL Micro controller
RS≦
×RPU
VIL=0.3VCC VOL=0.4V RPU=20kΩ
0.3×3-0.4-0.1×3
3
×20×10
1.1×3-0.3×3
EEPROM
≦1.67[kΩ]
Figure 39. I/O Circuit Diagram
3.
VIL-VOL-0.1Vcc
1.1Vcc-VIL
Minimum Value of RS
The minimum value of RS is determined by over current at bus collision. When over current flows, noises in power source
line and instantaneous power failure of power source may occur. When allowable over current is defined as I, the
following relation must be satisfied. Determine the allowable current in consideration of the impedance of power source
line in set and so forth. Set the over current to EEPROM at 10mA or lower.
Vcc
RS ≦I
RPU
'L'output
∴
RS≧
RS
Vcc
I
EX) VCC=3V I=10mA
Over current I
RS≧
'H' output
3
10×10-3
≧300[Ω]
Microcontroller
EEPROM
Figure 40. I/O Circuit Diagram
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I/O Equivalence Circuit
1.
Input (SCL)
Figure 41. Input Pin Circuit Diagram
2.
Input / Output (SDA)
Figure 42. Input / Output Pin Circuit Diagram
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Power-Up/Down Conditions
At power on, the IC’s internal circuit may go through unstable low voltage area as the Vcc rises, making the IC’s internal
logic circuit not completely reset, hence, malfunction may occur. To prevent this, the IC is equipped with POR circuit and
LVCC circuit. To assure the operation, observe the following conditions at power on.
1. Set SDA = 'H' and SCL ='L' or 'H’
2. Start power source so as to satisfy the recommended conditions of tR, tOFF, and Vbot for operating POR circuit.
tR
Recommended conditions of tR, tOFF,Vbot
VCC
tOFF
tR
tOFF
Vbot
0
Vbot
10ms or below
10ms or larger
0.3V or below
100ms or below
10ms or larger
0.2V or below
Figure 43. Rise Waveform Diagram
3. Set SDA and SCL so as not to become 'Hi-Z'.
When the above conditions 1 and 2 cannot be observed, take the following countermeasures.
(1) In the case when the above condition 1 cannot be observed such that SDA becomes 'L' at power on.
→Control SCL and SDA as shown below, to make SCL and SDA, 'H' and 'H'.
VCC
tLOW
SCL
SDA
After Vcc becomes stable
After Vcc becomes stable
tDH
tSU:DAT
Figure 44. When SCL= 'H' and SDA= 'L'
tSU:DAT
Figure 45. When SCL='L' and SDA='L'
(2) In the case when the above condition 2 cannot be observed.
→After power source becomes stable, execute software reset(Page 15).
(3) In the case when the above conditions 1 and 2 cannot be observed.
→Carry out (1), and then carry out (2).
Low Voltage Malfunction Prevention Function
LVCC circuit prevents data rewrite operation at low power and prevents write error. At LVCC voltage (Typ =1.2V) or below,
data rewrite is prevented.
Noise Countermeasures
1. Bypass Capacitor
When noise or surge gets in the power source line, malfunction may occur, therefore, it is recommended to connect a
bypass capacitor (0.1µF) between the IC’s Vcc and GND. Connect the capacitor as close to the IC as possible. In
addition, it is also recommended to connect a bypass capacitor between the board’s Vcc and GND.
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Operational Notes
1.
Described numeric values and data are design representative values only and the values are not guaranteed.
2.
We believe that the application circuit examples in this document are recommendable. However, in actual use, confirm
characteristics further sufficiently. If changing the fixed number of external parts is desired, make your decision with
sufficient margin in consideration of static characteristics, transient characteristics, and fluctuations of external parts
and our LSI.
3.
Absolute maximum ratings
If the absolute maximum ratings such as supply voltage, operating temperature range and so on are exceeded, LSI
may be destroyed. Do not supply voltage or subject the IC to temperature exceeding the absolute maximum ratings. In
the case of fear of exceeding the absolute maximum ratings, take physical safety countermeasures such as adding
fuses, and see to it that conditions exceeding the absolute maximum ratings should not be supplied to the LSI.
4.
GND electric potential
Set the voltage of GND terminal lowest at any operating condition. Make sure that each terminal voltage is not lower
than that of GND terminal.
5. Thermal design
Use a thermal design that allows for a sufficient margin by taking into account the permissible power dissipation (Pd) in
actual operating conditions.
6.
Short between pins and mounting errors
Be careful when mounting the IC on printed circuit boards. The IC may be damaged if it is mounted in a wrong
orientation or if pins are shorted together. Short circuit may be caused by conductive particles caught between the pins.
7.
Operating the IC in the presence of strong electromagnetic field may cause malfunction, therefore, evaluate design
sufficiently.
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BRCB008GWZ-3
Part Numbering
B
R C
B 0
0 8 G W
Z -
3
E 2
BUS type
2
C：I C
Revision
Capacity
008=8K
Package
GWZ：UCSP30L1
Process Code
Packaging and forming specification
E2：: Embossed tape and reel
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BRCB008GWZ-3
Physical Dimensions Tape and Reel Information
UCSP30L1
1PIN MARK
1
2
GND
0.94±0.05
Vcc
SCL
(top view)
SDA
0.06
0.33MAX
0.94±0.05
S
S
0.27±0.05
0.06
4-φ0.20±0.05
A
0.05
A B
B
SDA
Vcc
GND
B
0.4
SCL
(bottom view)
A
1
2
0.27±0.05
P = 0.4× 1
<Tape and Reel information>
Tape
Embossed carrier tape
Quantity
3000pcs
6000pcs
Direction
of feed
E2
The direction is the 1pin of product is at the upper left when you hold
( reel on the left hand and you pull out the tape on the right hand
Direction of feed
1pin
Reel
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BRCB008GWZ-3
Marking Diagram
1PIN MARK
UCSP30L1(TOP VIEW)
Part Number Marking
B
8
LOT NO.
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BRCB008GWZ-3
Revision History
Date
Revision
18.Aug.2012
001
New Release
25.Feb.2013
002
Update some English words, sentences’ descriptions, grammar and
formatting.
Update Part Numbering.
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Notice
●General Precaution
1) Before you use our Products, you are requested to carefully read this document and fully understand its contents.
ROHM shall not be in any way responsible or liable for failure, malfunction or accident arising from the use of any
ROHM’s Products against warning, caution or note contained in this document.
2) All information contained in this document is current as of the issuing date and subject to change without any prior
notice. Before purchasing or using ROHM’s Products, please confirm the latest information with a ROHM sales
representative.
●Precaution on using ROHM Products
1) Our Products are designed and manufactured for application in ordinary electronic equipments (such as AV equipment,
OA equipment, telecommunication equipment, home electronic appliances, amusement equipment, etc.). If you
intend to use our Products in devices requiring extremely high reliability (such as medical equipment, transport
equipment, traffic equipment, aircraft/spacecraft, nuclear power controllers, fuel controllers, car equipment including car
accessories, safety devices, etc.) and whose malfunction or failure may cause loss of human life, bodily injury or
serious damage to property (“Specific Applications”), please consult with the ROHM sales representative in advance.
Unless otherwise agreed in writing by ROHM in advance, ROHM shall not be in any way responsible or liable for any
damages, expenses or losses incurred by you or third parties arising from the use of any ROHM’s Products for Specific
Applications.
2)
ROHM designs and manufactures its Products subject to strict quality control system. However, semiconductor
products can fail or malfunction at a certain rate. Please be sure to implement, at your own responsibilities, adequate
safety measures including but not limited to fail-safe design against the physical injury, damage to any property, which
a failure or malfunction of our Products may cause. The following are examples of safety measures:
[a] Installation of protection circuits or other protective devices to improve system safety
[b] Installation of redundant circuits to reduce the impact of single or multiple circuit failure
3)
Our Products are designed and manufactured for use under standard conditions and not under any special or
extraordinary environments or conditions, as exemplified below. Accordingly, ROHM shall not be in any way
responsible or liable for any damages, expenses or losses arising from the use of any ROHM’s Products under any
special or extraordinary environments or conditions. If you intend to use our Products under any special or
extraordinary environments or conditions (as exemplified below), your independent verification and confirmation of
product performance, reliability, etc, prior to use, must be necessary:
[a] Use of our Products in any types of liquid, including water, oils, chemicals, and organic solvents
[b] Use of our Products outdoors or in places where the Products are exposed to direct sunlight or dust
[c] Use of our Products in places where the Products are exposed to sea wind or corrosive gases, including Cl2,
H2S, NH3, SO2, and NO2
[d] Use of our Products in places where the Products are exposed to static electricity or electromagnetic waves
[e] Use of our Products in proximity to heat-producing components, plastic cords, or other flammable items
[f] Sealing or coating our Products with resin or other coating materials
[g] Use of our Products without cleaning residue of flux (even if you use no-clean type fluxes, cleaning residue of
flux is recommended); or Washing our Products by using water or water-soluble cleaning agents for cleaning
residue after soldering
[h] Use of the Products in places subject to dew condensation
4)
The Products are not subject to radiation-proof design.
5)
Please verify and confirm characteristics of the final or mounted products in using the Products.
6)
In particular, if a transient load (a large amount of load applied in a short period of time, such as pulse) is applied,
confirmation of performance characteristics after on-board mounting is strongly recommended. Avoid applying power
exceeding normal rated power; exceeding the power rating under steady-state loading condition may negatively affect
product performance and reliability.
7)
De-rate Power Dissipation (Pd) depending on Ambient temperature (Ta). When used in sealed area, confirm the actual
ambient temperature.
8)
Confirm that operation temperature is within the specified range described in the product specification.
9)
ROHM shall not be in any way responsible or liable for failure induced under deviant condition from what is defined in
this document.
Notice - Rev.004
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Datasheet
●Precaution for Mounting / Circuit board design
1) When a highly active halogenous (chlorine, bromine, etc.) flux is used, the residue of flux may negatively affect product
performance and reliability.
2)
In principle, the reflow soldering method must be used; if flow soldering method is preferred, please consult with the
ROHM representative in advance.
For details, please refer to ROHM Mounting specification
●Precautions Regarding Application Examples and External Circuits
1) If change is made to the constant of an external circuit, please allow a sufficient margin considering variations of the
characteristics of the Products and external components, including transient characteristics, as well as static
characteristics.
2)
You agree that application notes, reference designs, and associated data and information contained in this document
are presented only as guidance for Products use. Therefore, in case you use such information, you are solely
responsible for it and you must exercise your own independent verification and judgment in the use of such information
contained in this document. ROHM shall not be in any way responsible or liable for any damages, expenses or losses
incurred by you or third parties arising from the use of such information.
●Precaution for Electrostatic
This Product is electrostatic sensitive product, which may be damaged due to electrostatic discharge. Please take proper
caution in your manufacturing process and storage so that voltage exceeding the Products maximum rating will not be
applied to Products. Please take special care under dry condition (e.g. Grounding of human body / equipment / solder iron,
isolation from charged objects, setting of Ionizer, friction prevention and temperature / humidity control).
●Precaution for Storage / Transportation
1) Product performance and soldered connections may deteriorate if the Products are stored in the places where:
[a] the Products are exposed to sea winds or corrosive gases, including Cl2, H2S, NH3, SO2, and NO2
[b] the temperature or humidity exceeds those recommended by ROHM
[c] the Products are exposed to direct sunshine or condensation
[d] the Products are exposed to high Electrostatic
2)
Even under ROHM recommended storage condition, solderability of products out of recommended storage time period
may be degraded. It is strongly recommended to confirm solderability before using Products of which storage time is
exceeding the recommended storage time period.
3)
Store / transport cartons in the correct direction, which is indicated on a carton with a symbol. Otherwise bent leads
may occur due to excessive stress applied when dropping of a carton.
4)
Use Products within the specified time after opening a humidity barrier bag. Baking is required before using Products of
which storage time is exceeding the recommended storage time period.
●Precaution for Product Label
QR code printed on ROHM Products label is for ROHM’s internal use only.
●Precaution for Disposition
When disposing Products please dispose them properly using an authorized industry waste company.
●Precaution for Foreign Exchange and Foreign Trade act
Since our Products might fall under controlled goods prescribed by the applicable foreign exchange and foreign trade act,
please consult with ROHM representative in case of export.
●Precaution Regarding Intellectual Property Rights
1) All information and data including but not limited to application example contained in this document is for reference
only. ROHM does not warrant that foregoing information or data will not infringe any intellectual property rights or any
other rights of any third party regarding such information or data. ROHM shall not be in any way responsible or liable
for infringement of any intellectual property rights or other damages arising from use of such information or data.:
2)
No license, expressly or implied, is granted hereby under any intellectual property rights or other rights of ROHM or any
third parties with respect to the information contained in this document.
Notice - Rev.004
© 2013 ROHM Co., Ltd. All rights reserved.
Datasheet
●Other Precaution
1) The information contained in this document is provided on an “as is” basis and ROHM does not warrant that all
information contained in this document is accurate and/or error-free. ROHM shall not be in any way responsible or
liable for any damages, expenses or losses incurred by you or third parties resulting from inaccuracy or errors of or
concerning such information.
2)
This document may not be reprinted or reproduced, in whole or in part, without prior written consent of ROHM.
3)
The Products may not be disassembled, converted, modified, reproduced or otherwise changed without prior written
consent of ROHM.
4)
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Notice - Rev.004
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