TSA5060AT PHILIPS [NXP Semiconductors], TSA5060AT Datasheet - Page 6

• Manufacturer Part Number: TSA5060AT
• Description: 1.3 GHz I2C-bus controlled low phase noise frequency synthesizer
• Manufacturer: PHILIPS [NXP Semiconductors]

Philips Semiconductors
The TSA5060A is controlled via the two-wire I
For programming, there is one 7-bit module address and
bit R/W for selecting READ or WRITE mode.
To be able to have more than one synthesizer in an
I
depending on the voltage applied at pin AS (see Table 3).
The TSA5060A fulfils the fast mode I
the Philips I
designed in such a way that pins SCL and SDA can be
connected either to 5 or 3.3 V pulled-up I
allowing the PLL synthesizer to be connected directly to
the bus lines of a 3.3 V microcontroller.
WRITE mode: R/W = 0
After the address transmission (first byte), data bytes can
be sent to the device (see Table 1). Four data bytes are
needed to fully program the TSA5060A. The bus
transceiver has an auto-increment facility that permits
programming of the TSA5060A within one single
transmission (address + 4 data bytes).
The TSA5060A can also be partly programmed on the
condition that the first data byte following the address is
byte 2 or 4. The meaning of the bits in the data bytes is
given in Table 1. The first bit of the first data byte indicates
whether byte 2 (first bit is logic 0) or byte 4 (first bit is
logic 1) will follow. Until an I
by the controller, additional data bytes can be entered
without the need to re-address the device.
Table 1 Write data format
Note
1. MSB is transmitted first.
2000 Oct 24
2
BYTE
C-bus system, one of four possible addresses is selected
1.3 GHz I
noise frequency synthesizer
1
2
3
4
5
address
programmable divider
programmable divider
control data
control data
2
C-bus specification. The I
DESCRIPTION
2
C-bus controlled low phase
2
C-bus STOP condition is sent
MSB
N7
C1
2
1
0
1
C-bus, according to
2
(1)
C-bus interface is
2
C-bus lines,
N14
N16
N6
C0
2
1
C-bus.
XCE
N13
N15
N5
0
6
To allow a smooth frequency sweep for fine tuning, and
while the data of the dividing ratio of the main divider is in
data bytes 2, 3 and 4, it is necessary to change the
frequency to send the data bytes 2 to 5 in a repeated
sending, or to finish an incomplete transmission by a
STOP condition. Repeated sending of data bytes 2 and 3
without ending the transmission does not change the
dividing ratio. To illustrate, the following data sequences
will change the dividing ratio:
XCS
N12
PE
N4
0
Bytes 2, 3, 4 and 5
Bytes 4, 5, 2 and 3
Bytes 2, 3, 4 and STOP
Bytes 4, 5, 2 and STOP
Bytes 2, 3 and STOP
Bytes 2 and STOP
Bytes 4 and STOP.
N11
N3
R3
P3
0
P2/T2
MA1
N10
N2
R2
P1/T1
MA0
N9
N1
R1
P0/T0
LSB
N8
N0
R0
0
Product specification
TSA5060A
CONTROL BIT
A
A
A
A
A