tsa5515t NXP Semiconductors, tsa5515t Datasheet - Page 7

• Manufacturer Part Number: tsa5515t
• Description: 1.3 Ghz Bi-directional I2c-bus Controlled Synthesizer
• Manufacturer: NXP Semiconductors

Data can be read out of the TSA5515T by setting the R/W
The module address contains programmable address bits (MA1 and MA0), which offer the possibility of having several
synthesizers (up to 4) in one system. The relationship between MA1 and MA0 and the input voltage on AS input is given
in Table 3.
Table 3 Address selection
Philips Semiconductors
READ mode:
R/W = 1 (see Table 2)
bit to 1. After the slave address has been recognized, the
TSA5515T generates an acknowledge pulse and the first
data byte (status word) is transferred on the SDA line
(MSB first). Data is valid on the SDA line during a high
position of the SCL clock signal.
A second data byte can be read out of the TSA5515T if the
processor generates an acknowledge on the SDA line.
End of transmission will occur if no acknowledge from the
Table 2
Notes
1. POR
2. FL
MSB is transmitted first.
Address selection (see Table 3)
November 1991
Address
Status byte
1.3 GHz bi-directional I
MA1
0
0
1
1
Read data format
in-lock flag (FL = 1 when the loop is phase-locked).
power-on-reset flag. (POR = 1 on power-on)
MSB
POR
MA0
1
0
1
0
1
FL
2
1
C-bus controlled synthesizer
0 to 0.1 V
open
0.4 to 0.6 V
0.9 V
0
1
CC
to V
CC
CC
0
1
CC
7
processor occurs. The TSA5515T will then release the
data line to allow the processor to generate a STOP
condition.
The POR flag (power-on-reset) is set to 1 when V
below 3 V and at power-on. It is reset when an end of data
is detected by the TSA5515T (end of a READ sequence).
Control of the loop is made possible with the in-lock flag
FL, which indicates (FL = 1) when the loop is
phase-locked.
0
1
Voltage applied on AS pin
MA1
1
MA0
1
LSB
1
1
A
Product specification
TSA5515T
byte 1
byte 2
CC
goes