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參數(shù)資料
| 型號(hào)： | BR24C21 |
| 廠商： | Rohm CO.,LTD. |
| 英文描述： | 25 AMP MINIATURE POWER RELAY |
| 中文描述： | 身份證光盤(pán)用于CRT顯示器 |
| 文件頁(yè)數(shù)： | 6/12頁(yè) |
| 文件大小： | 671K |
| 代理商： | BR24C21 |
BR24C21 / BR24C21F / BR24C21FJ / BR24C21FV
Memory ICs
(2) Bi-directional Mode
1) Bi-directional Mode and Recovery function
The BR24C21, BR24C21F, BR24C21FJ and BR24C21FV can be switched from Transmit-Only Mode to
Bi-directional Mode by providing a valid high to low transition on the SCL pin, and the state of SDA is high-impedance.
After a valid high to low transition on the SCL pin, the BR24C21, BR24C21F, BR24C21FJ and BR24C21FV begin to
count the VCLK clock. If the VCLK counter reaches 128 clock without the command for Bi-directional Mode, the
device revert to Transmit-Only Mode. (Recovery function) The VCLK counter is reset by providing a valid high to low
transition on the SCL pin. After reversion to Transmit-Only Mode, the devices begin to output a data with the 129th
rising clock edge on VCLK. The output data is 00h address data at the time.
If the BR24C21, BR24C21F, BR24C21FJ and BR24C21FV are switched from Transmit-Only Mode and received
the command for Bi-directional Mode and responds with an Acknowledge, it is impossible to revert to Transmit-Only
Mode. (The only way to revert to Transmit-Only Mode is that the power down again.) Unless the input device code is
“1010”, the device responds no Acknowledge. If the VCLK counter reaches 128 clock afterward, it is possible to revert
to Transmit-Only Mode for Recovery function. If the master generates a stop condition during the slave address input,
it is possible to revert to Transmit-Only Mode.
When the devices are switched from Transmit-Only Mode to Bi-directional Mode, the period of t
VHZ
need to be held.
Fig.12 RECOVERY MODE
ADDRESS 00h
SDA
t
VHZ
VCLK
MODE
Transmit-Only
Bi-directional
Transition Mode with possibility to return to Transmit-Only Mode
Transmit-Only
SCL
D4
D5
D6
D7
129
128
127
3
2
1
4
Fig.13 MODE CHANGE
SDA
t
VHZ
VCLK
MODE
Transmit-only
Bi-directional
Transition Mode with possibility to return to Transmit-Only Mode
Bi-directional
parmanently
SCL
R/W
ACK
S
1
0
1
0
2
n
n
<
128
1
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| BR24C21F | ID ROM for CRT display |
| BR24L01AFJ-W | 128】8 bit electrically erasable PROM |
| BR24L01 | 128】8 bit electrically erasable PROM |
| BR24L04F-W | 512】8 bit electrically erasable PROM |
| BR24L04FJ-W | 512】8 bit electrically erasable PROM |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| BR24C21_09 | 制造商:ROHM 制造商全稱:Rohm 功能描述:EDID Memory (For display) |
| BR24C21_11 | 制造商:ROHM 制造商全稱:Rohm 功能描述:EDID Memory (For display) |
| BR24C21F | 制造商:ROHM 制造商全稱:Rohm 功能描述:EDID Memory (For display) |
| BR24C21F-E2 | 功能描述:電可擦除可編程只讀存儲(chǔ)器 I2C 1K BIT 128 X 8 3.3V/5V 8PIN RoHS:否 制造商:Atmel 存儲(chǔ)容量:2 Kbit 組織:256 B x 8 數(shù)據(jù)保留:100 yr 最大時(shí)鐘頻率:1000 KHz 最大工作電流:6 uA 工作電源電壓:1.7 V to 5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 |
| BR24C21FJ | 制造商:ROHM 制造商全稱:Rohm 功能描述:ID ROM for CRT display |
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