Datasheet

DATA IN
Start
DATA OUT ACK
RFA A1 A0 D4 D3 D2 D1 D0DA7
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
HighorLow
Mode,Static
HighorLow
DATA IN
t
Start
T
EOS
T
EOS
DA0
0
RFA
0
D0
1
AddressByte DATA Byte
TPS62400, TPS62401
TPS62402, TPS62403, TPS62404
SLVS681E –JUNE 2006–REVISED APRIL 2010 www.ti.com
The device enters forced PWM mode operation immediately whenever the MODE/DATA pin turns to high level.
The device also stays in forced PWM mode during the entire protocol reception time.
With a falling edge on the MODE/DATA pin the device starts bit decoding. If the MODE/DATA pin stays low for at
least t
timeout
, the device gets an internal timeout and Power Save Mode operation is enabled.
A protocol sent within this time is ignored because the falling edge for the Mode change is first interpreted as
start of the first bit. In this case it is recommended to send the protocol first, and then change at the end of the
protocol to Power Save Mode.
Figure 35. EasyScale™ Protocol Overview
Table 3. EasyScale™ 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
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 36. EasyScale™ Protocol Without Acknowledge
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Product Folder Link(s): TPS62400 TPS62401 TPS62402 TPS62403 TPS62404