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参数资料
| 型号： | BU9880GUL-WE2 |
| 厂商： | Rohm Semiconductor |
| 文件页数： | 16/25页 |
| 文件大小： | 0K |
| 描述： | IC EEPROM 64KBIT 2WIRE VCSP50L1 |
| 标准包装： | 3,000 |
| 格式 - 存储器： | EEPROMs - 串行 |
| 存储器类型： | EEPROM |
| 存储容量： | 64K (8K x 8) |
| 速度： | 400kHz |
| 接口： | I²C，2 线串口 |
| 电源电压： | 1.7 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 6-UFBGA，CSPBGA |
| 供应商设备封装： | VCSP50L1 |
| 包装： | 带卷 (TR) |
BU9880GUL-W (64Kbit)
Datasheet
● Software reset
Software reset is executed when to avoid malfunction after power on, and to reset during command input. Software reset
has several kinds, and 3 kids of them are shown in the figure below. (Refer to Figure 37(a), Figure 37(b), Figure 37(c).) In
dummy clock input area, release the SDA bus ('H' by pull up). In dummy clock area, 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
Start×2
SCL
1
2
13
14
Normal command
SDA
Normal command
Figure 37-(a) The case of 14 Dummy clock + START + START+ command input
Start
Dummy clock×9
Start
SCL
1
2
8
9
Normal command
SDA
Normal command
Figure 37-(b) The case of START+9 Dummy clock + START + command input
Start×9
SCL
1
2
3
7
8
9
Normal command
SDA
Figure 37-(c) START × 9 + command input
Normal command
* Start command from START input.
● Acknowledge polling
During internal write, all input commands are ignored, therefore ACK is not sent back. During internal automatic write
execution after write cycle input, next command (slave address) is sent, and if the first ACK signal sends back 'L', then it
means end of write action, while if it sends back 'H', it means now in writing. By use of acknowledge polling, next command
can be executed without waiting fo r tWR = 5ms.
When to write continuously, R / W = 0, when to carry out current read cycle after write, slave address R / W = 1 is sent,
and if ACK signal sends back 'L', then execute word address input and data so forth.
First write command
During internal write,
ACK = HIGH is sent back.
Slave
Slave
S
T
A
R
T
Write command
S
T
O
P
S
T
A
R address
T
A
C
K
H
t WR
S
T
A
R
T
A
C
address K
H
…
Second write command
Slave
Slave
…
S
T
A
R
T
A
C
address K
H
S
T
A
R
T
A
C
address K
L
Word
address
A
C
K
L
Data
A
C
K
L
S
T
O
P
t WR
After completion of internal
write, ACK=LOW is sent back,
so input next word address and
data in succession.
Figure 38. Case to continuously write by acknowledge polling
www.rohm.com
? 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111 ? 15 ? 001
16/22
TSZ02201-0R2R0G100340-1-2
21.AUG.2012 Rev.001
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相关代理商/技术参数 |
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| BU9881 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:I2C Serial EEPROM |
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| BU9882FV-W | 制造商:ROHM 制造商全称:Rohm 功能描述:EDID Memory (For display) |
| BU9882FV-WE2 | 功能描述:电可擦除可编程只读存储器 2K BIT 128 X 8 X 2 3.3V/5V 14PIN RoHS:否 制造商:Atmel 存储容量:2 Kbit 组织:256 B x 8 数据保留:100 yr 最大时钟频率:1000 KHz 最大工作电流:6 uA 工作电源电压:1.7 V to 5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 |
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