参数资料
型号: 24LCS21A-I/SN
厂商: Microchip Technology
文件页数: 6/20页
文件大小: 0K
描述: IC EEPROM 1KBIT 400KHZ 8SOIC
产品培训模块: I2C Serial EEPROM
标准包装: 100
格式 - 存储器: EEPROMs - 串行
存储器类型: EEPROM
存储容量: 1K (128 x 8)
速度: 100kHz,400kHz
接口: I²C,2 线串口
电源电压: 2.5 V ~ 5.5 V
工作温度: -40°C ~ 85°C
封装/外壳: 8-SOIC(0.154",3.90mm 宽)
供应商设备封装: 8-SOICN
包装: 管件
产品目录页面: 1444 (CN2011-ZH PDF)
24LCS21A
FIGURE 3-3:
DISPLAY OPERATION PER DDC STANDARD PROPOSED BY VESA ?
The 24LCS21A was designed to
Display Power-on
or
DDC? Circuit Powered
from +5 volts
Communication
is idle
Is Vsync
present?
No
comply to the portion of flowchart inside dash box.
Yes
Send EDID? continuously
using Vsync as clock
High-to-Low
transition on
SCL?
Yes
Stop sending EDID.
Switch to DDC2? mode.
No
High-to-Low
transition on
SCL?
Yes
DDC2 communication
idle. Display waiting for
address byte.
No
Display has
optional
transition state
?
Yes
Set Vsync counter = 0
or start timer
No
DDC2B
address
received?
No
Yes
Receive DDC2B
command
No
No
Change on
SCL, SDA or
VCLK lines?
Yes
High-Low
transition on SCL
?
Yes
Reset Vsync counter = 0
Valid
DDC2 address
received?
Yes
Reset counter or timer
Is display
Access.bus TM
capable?
Yes
Valid Access.bus
address?
Yes
No
Respond to DDC2B
command
No
No
No
No
VCLK
cycle?
Yes
Increment VCLK counter
(if appropriate)
Counter = 128 or
timer expired?
See Access.bus
specification to determine
correct procedure.
Yes
Switch back to DDC1?
mode.
Note 1: The base flowchart is copyright ? 1993, 1994, 1995 Video Electronic Standard Association (VESA) from
VESA’s Display Data Channel (DDC) Standard Proposal ver. 2p rev. 0, used by permission of VESA.
2: The dash box and text “The 24LCS21A and... inside dash box.” are added by Microchip Technology Inc.
3: Vsync signal is normally used to derive a signal for VCLK pin on the 24LCS21A.
DS21161H-page 6
? 2007 Microchip Technology Inc.
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