ZL10039 Datasheet, PDF (8/35 Pages) Zarlink Semiconductor Inc – Digital Satellite Tuner with RF Bypass

ZL10039
Data Sheet
The output of the phase detector feeds a charge pump which combined with an external loop filter integrates the
current pulses to control the varactor voltage. The charge pump current is automatically varied by the VCO control
logic to compensate for VCO gain variations that are dependent on selected sub band. The varactor control voltage
is externally coupled to the oscillator section through the input pin Vvar.
1.4 I²C Interface
All programming for the ZL10039 is controlled by an I²C data bus and is compatible with 3V3 standard mode
formats.
Data and Clock are fed in on the SDA and SCL lines respectively as defined by I²C bus format. The device can
either accept data (write mode), or send data (read mode). The LSB of the address byte (R/W) sets the device into
write mode if it is logic ‘0’, and read mode if it is logic ‘1’. The I²C address is fixed at C0 (Write)/C1(Read) in hex
format.
The ZL10039 contains 16 control registers. These registers are read/write registers. These registers are addressed
as sub-addresses on the I²C bus. Registers can be addressed as random access single write/read or random
access sequential write and read as shown below.
Random Access Single Write
Stop
Start
Device W A
Address
Register A
Address
N
Register
Data
N
A Stop
Random Access Sequential Write
Stop Start Device W A Register A
Address
Address
N
Register A
Data
N
Register
Data ...
N+1
Register
Data
N+M
A Stop
Stop
Random Access Single Read
Stop
Start
Device W A
Address
Register A
Address
N
Start
Device R A
Address
Register
Data
N
N Stop
Random Access Sequential Read
Stop
Start
Device W A
Address
Register A
Address
N
Start
Device R A
Address
Register
Data
N
A
...
Register
Data
N+M
N Stop
W
Write bit
A
Acknowledge Bit
N
Not Acknowledge
A SLEEP pin is provided. This powers down all sections of the chip including the crystal oscillator and I²C interface.
The RF bypass function will be operational in this mode providing it has been previously enabled through the I²C
interface.
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Zarlink Semiconductor Inc.