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參數資料
| 型號： | TPS62421DRCR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩壓器 |
| 英文描述： | 1.61 A DUAL SWITCHING CONTROLLER, 2500 kHz SWITCHING FREQ-MAX, PDSO10 |
| 封裝： | 3 X 3 MM, GREEN, PLASTIC, SON-10 |
| 文件頁數： | 13/37頁 |
| 文件大小： | 1020K |
| 代理商： | TPS62421DRCR |
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DATA IN
Start
DATA OUT
ACK
RFA
A1
A0
D4
D3
D2
D1
D0
DA7
0
DA6
1
DA5
0
DA4
0
DA3
1
DA2
1
DA1
1
DA0
0
Device Address
DATABYTE
EOS Start
EOS
Start
DA7
0
t
Start
Mode,Static
HighorLow
Mode,Static
HighorLow
DATA IN
t
Start
T
EOS
T
EOS
DA0
0
RFA
0
D0
1
AddressByte
DATA Byte
SLVS676C – JUNE 2006 – REVISED JUNE 2010
www.ti.com
MODE Selection
Because of the MODE/DATA pin is used for two functions, interface and a MODE selection, the device needs to
determine when it has to decode the bit stream or to change the operation mode.
The device enters forced PWM mode operation immediately whenever the MODE/DATA pin turns to high level.
The device stays also in forced PWM mode during the whole time of a protocol reception.
With a falling edge on the MODE/DATA pin the device starts bit decoding. If the MODE/DATA pin stays low for at
least ttimeout, the device get’s an internal timeout and Power Save Mode operation is enabled.
A protocol which is sent within this time will be ignored, because the falling edge for the Mode change will be first
interpreted as start of the first bit. In this case it is recommended to send first the protocol and change at the end
of the protocol to Power Save Mode.
Figure 28. Easy Scale Protocol Overview
Table 3. Easy Scale Bit Description
BYTE
BIT
NAME
TRANSMISSION
DESCRIPTION
NUMBER
DIRECTION
Device
7
DA7
IN
0 MSB device address
Address
6
DA6
IN
1
Byte
5
DA5
IN
0
4
DA4
IN
0
4Ehex
3
DA3
IN
1
2
DA2
IN
1
DA1
IN
1
0
DA0
IN
0 LSB device address
Databyte
7(MSB)
RFA
IN
Request For Acknowledge, if high, Acknowledge condition will applied by the device
6
A1
Address Bit 1
5
A0
Address Bit 0
4
D4
Data Bit 4
3
D3
Data Bit 3
2
D2
Data Bit 2
1
D1
Data Bit 1
0(LSB)
D0
Data Bit 0
ACK
OUT
Acknowledge condition active 0, this condition will only be applied in case RFA bit is
set. Open drain output, Line needs to be pulled high by the host with a pullup
resistor.
This feature can only be used if the master has an open drain output stage. In case
of a push pull output stage Acknowledge condition may not be requested!
Figure 29. Easy Scale Protocol Without Acknowledge
20
Copyright 2006–2010, Texas Instruments Incorporated
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