数据搜索系统,热门电子元器件搜索 |
|
CAT24C21WE-T3 数据表(PDF) 4 Page - ON Semiconductor |
|
CAT24C21WE-T3 数据表(HTML) 4 Page - ON Semiconductor |
4 / 14 page CAT24C21 http://onsemi.com 4 Transmit−Only Mode: (DDC1) Upon power−up, the CAT24C21 will output valid data only after it has been initialized. During initialization, data will not be available until after the first nine clocks are sent to the device (Figure 3). The starting address for the transmit−only mode can be determined during initialization. If the SDA pin is high during the first eight clocks, the starting address will be 7FH. If the SDA pin is low during the first eight clocks, the starting address will be 00H. During the ninth clock, SDA will be in the high impedance state. Data is transmitted in 8 bit words with the most significant bit first, followed by a 9th ‘don’t care’ bit which will be in the high impedance state (Figure 4). The CAT24C21 will continuously sequence through the entire memory array as long as VCLK is present and no falling edges on SCL are detected. When the maximum address (7FH) is reached, addressing will wrap around to the zero location (00H) and transmitting will continue. The bi−directional mode clock (SCL) pin must be held high for the device to remain in the transmit−only mode. Figure 2. Mode Transition SCL Transmit−Only Mode Bi−Directional Mode TVHZ SDA VCLK Figure 3. Device Initialization for Transmit−only Mode SCL SDA VCLK SDA at high impedance for 9 clock cycles Bit8 TVPU 12 3 4 56 78 9 10 11 12 13 14 15 Bit7 Bit6 Bit5 Bit4 TVAA Figure 4. Transmit−Only Mode SCL SCL must remain high for transmit−only mode Don’t Care SDA VCLK TVHIGH TVLOW Bit7 Bit6 Bit5 Bit4 (MSB) Bit8 (LSB) Bit3 Bit2 Bit1 Bit8 Bit7 |
类似零件编号 - CAT24C21WE-T3 |
|
类似说明 - CAT24C21WE-T3 |
|
|
链接网址 |
隐私政策 |
ALLDATASHEETCN.COM |
ALLDATASHEET是否为您带来帮助? [ DONATE ] |
关于 Alldatasheet | 广告服务 | 联系我们 | 隐私政策 | 链接交换 | 制造商名单 All Rights Reserved©Alldatasheet.com |
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 Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |