AAT2601 Datasheet, PDF (30/38 Pages) Advanced Analogic Technologies – Total Power Solution for Portable Applications

PRODUCT DATASHEET
AAT2601178
Total Power Solution for Portable Applications
Transferring Data
Every byte on the bus must be 8 bits long. A byte is
always sent with a most significant bit first (see Figure
8).
MSB
LSB R/W
Figure 8: Bit Order.
The address is embedded in the first seven bits of the
byte. The eighth bit is reserved for the direction of the
information flow for the next byte of information. For
the AAT2601, this bit must be set to “0”. The full 8-bit
address including the R/W bit is 0x98 (hex) or
10011000 in binary.
Acknowledge Bit
The acknowledge bit is the ninth bit of data. It is used
to send back a confirmation to the master that the
data has been received properly. For acknowledge to
take place, the MASTER must first release the SDA
line, then the SLAVE will pull the data line low as
shown in Figure 7.
Serial Programming Code
After sending the chip address, the master should send
an 8-bit data stream to select which register to program
and then the codes that the user wishes to enter.
Register 0x00:
Timer
RCHG₁
RCHG₀
CHG₂
CHG₁
CHG₀
Term₁
Term₀
Register 0x01:
Not used
Not used
Not used
Not used
Not used
SYS
LDO1₁
LDO1₀
Register 0x02:
LDO5₁
LDO5₀
LDO4₁
LDO4₀
LDO3₁
LDO3₀
Figure 9: Serial Programming Register Codes.
LDO2₁
LDO2₀
USE_USB Pin
1
0
X
X
X
X
X
X
X
CHG₂
0
0
0
0
0
1
1
1
1
CHG₁
0
0
0
1
1
0
0
1
1
CHG₀
0
0
1
0
1
0
1
0
1
Constant Current Charge
I_{CH_CC}
100mA
(fixed internally)
800mA
(set by I_SET resistor)
640mA
480mA
320mA
960mA
1120mA
1280mA
1440mA
Constant Current Charge as
% of I_SET Current
(default)
100% (default)
80%
60%
40%
120%
140%
160%
180%
Table 3: CHG Bit Setting for the Constant Current Charge Level
(assuming I_SET resistor is set to default 800mA charge current).
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2601.2008.01.1.0