decouple all the power-sup" />
參數(shù)資料
型號: DS3514T+T&R
廠商: Maxim Integrated Products
文件頁數(shù): 11/21頁
文件大?。?/td> 0K
描述: IC I2C GAMMA/VCOM BUFF 48-TQFN
產(chǎn)品培訓(xùn)模塊: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標準包裝: 2,500
應(yīng)用: TFT-LCD 面板:伽瑪緩沖器,VCOM 驅(qū)動器
輸出類型: 滿擺幅
電路數(shù): 14
電流 - 電源: 5mA
電流 - 輸出 / 通道: 4mA
電壓 - 電源,單路/雙路(±): 9 V ~ 15 V
安裝類型: 表面貼裝
封裝/外殼: 48-WFQFN 裸露焊盤
供應(yīng)商設(shè)備封裝: 48-TQFN-EP(7x7)
包裝: 帶卷 (TR)
DS3514
Applications Information
Power-Supply Decoupling
To achieve the best results when using the DS3514,
decouple all the power-supply pins (VCC and VDD) with
a 0.01F or 0.1F capacitor. Use a high-quality ceramic
surface-mount capacitor if possible. Surface-mount
components minimize lead inductance, which improves
performance, and ceramic capacitors tend to have
adequate high-frequency response for decoupling
applications.
SDA and SCL Pullup Resistors
SDA is an I/O with an open-collector output that
requires a pullup resistor to realize high-logic levels. A
master using either an open-collector output with a
pullup resistor or a push-pull output driver can be used
for SCL. Pullup resistor values should be chosen to
ensure that the rise and fall times listed in the
I2C
Electrical Characteristics are within specification. A typ-
ical value for the pullup resistors is 4.7k
Ω.
SLAVE
ADDRESS*
START
1
0
A0
R/W
SLAVE
ACK
SLAVE
ACK
SLAVE
ACK
MSB
LSB
MSB
LSB
MSB
LSB
b7
b6
b5
b4
b3
b2
b1
b0
READ/
WRITE
REGISTER ADDRESS
b7
b6
b5
b4
b3
b2
b1
b0
DATA
STOP
SINGLE-BYTE WRITE
-WRITE LATCH A
GM8 TO 00h
SINGLE-BYTE WRITE
-ENTER STANDBY MODE
SINGLE-BYTE READ
-READ LATCH A GM2
TWO-BYTE WRITE
- WRITE 10h AND 11h TO 80h
START
REPEATED
START
C1h
DATA
MASTER
NACK
STOP
1 1000000
00000 010
02h
11000 001
1 1000000
00001 000
C0h
08h
OOh
STOP
START 1 1000000
01000 001
C0h
41h
STOP
I/O STATUS
80h
EXAMPLE I2C TRANSACTIONS (WHEN A0 IS CONNECTED TO GND).
TYPICAL I2C WRITE TRANSACTION
*THE SLAVE ADDRESS IS DETERMINED BY ADDRESS PIN A0.
00 000 000
1 00 0 0 0 0 0
C0h
A)
C)
B)
D)
SLAVE
ACK
SLAVE
ACK
SLAVE
ACK
SLAVE
ACK
SLAVE
ACK
SLAVE
ACK
SLAVE
ACK
SLAVE
ACK
SLAVE
ACK
START 1 1000000
00010 000
C0h
10h
STOP
80h
1 00 0 0 0 0 0
SLAVE
ACK
SLAVE
ACK
SLAVE
ACK
80h
1 00 0 0 0 0 0
SLAVE
ACK
TWO-BYTE READ
- READ 10h AND 11h
E)
START 1 1000000
00010 000
C0h
10h
STOP
SLAVE
ACK
SLAVE
ACK
SLAVE
ACK
MASTER
ACK
C1h
DATA
1 10 0 0 0 0 1
MASTER
NACK
REPEATED
START
Figure 6. I2C Communication Examples
I2C Gamma and VCOM Buffer with EEPROM
______________________________________________________________________________________
19
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