MAX1385 Datasheet, PDF (39/52 Pages) Maxim Integrated Products – Dual RF LDMOS Bias Controllers with I2C/SPI Interface

Dual RF LDMOS Bias Controllers
with I²C/SPI Interface
Table 23. FIFO (Read)
D15
D14
0
0
0
0
0
0
0
0
0
1
0
1
0
1
0
1
1
0
1
0
1
0
1
0
1
1
1
1
DATA BITS
D13
D12
0
0
0
1
1
0
1
1
0
0
0
1
1
0
1
1
0
0
0
1
1
0
1
1
0
0
0
1
D11
MSB
MSB
MSB
MSB
MSB
MSB
MSB
—
—
—
—
—
—
—
1
1
1
0
MSB
1
1
1
1
MSB
CONVERSION ORIGIN
D0
LSB Internal temperature sensor
LSB Channel 1 external temperature
LSB Channel 1 drain current (PGAOUT1)
LSB ADCIN1
LSB Channel 2 external temperature
LSB Channel 2 drain current (PGAOUT2)
LSB ADCIN2
— Reserved
— Reserved
— Reserved
— Reserved
— Reserved
— Reserved
— Reserved
Conversion may be corrupted. This occurs only when
LSB arriving data causes the FIFO to overflow at the same time
data is being read out.
LSB
Empty FIFO. The current value of the Flag register is
provided in place of the FIFO data.
16 bits of data from a MAX1385/MAX1386 register (see
Figure 11):
1) After generating a START condition (S or Sr),
address the MAX1385/MAX1386 by sending the
appropriate slave address byte and its correspond-
ing R/W bit set to a 0 (see the Slave Address Byte
section). The MAX1385/MAX1386 then answer with
an ACK bit (see the Acknowledge Bits section).
2) Send the appropriate read command byte (see the
Command Byte section). The MAX1385/MAX1386
answer with an ACK bit.
3) After generating a repeated START condition (Sr),
address the MAX1385/MAX1386 once more by
sending the appropriate slave address byte and its
R/W bit set to 1. The MAX1385/MAX1386 answer
with an ACK bit.
4) The MAX1385/MAX1386 transmit the most signifi-
cant 8-bit data byte of the 16-bit data word with the
MSB first. Afterwards, the master needs to send an
ACK bit.
5) The MAX1385/MAX1386 transmit the least signifi-
cant 8-bit byte of the 16-bit word with the MSB first.
Table 24. RDFINE1 and RDFINE2 (Read)
DATA BITS
D15–D10
D9–D0
POR
FUNCTION
X
Don’t care.
00 0000 0000
10-bit fine DAC input code.
D9 is the MSB.
6) The master issues a NACK bit and then generates a
repeated START or STOP condition (Sr or P).
Continue to poll the current register or read multiple
words (e.g., empty FIFO of several conversion results)
by omitting step 6 and keep issuing ACK bits after each
data byte. Use the following 3-byte sequence to read
16 bits of data from the last accessed MAX1385/
MAX1386 register:
1) After generating a START condition (S or Sr),
address the MAX1385/MAX1386 by sending the
appropriate 7-bit slave address byte and its corre-
sponding R/W bit set to 1 (see the Slave Address
Byte section). The MAX1385/MAX1386 then answer
with an ACK bit (see the Acknowledge Bits section).
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