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PDF KT0801A Data sheet ( Hoja de datos )

Número de pieza KT0801A
Descripción Monolithic Digital Stereo FM Transmitter
Fabricantes KTMicro 
Logotipo KTMicro Logotipo



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No Preview Available ! KT0801A Hoja de datos, Descripción, Manual

Monolithic Digital Stereo FM Transmitter
Radio-Station-on-a-Chip™
KT0801A
ƒ Features
Hardware and software compatible with KT0801
Additional features to KT0801
Increased transmission Power
Support input clock and external crystal:
32.768KHz, 7.6MHz, 15.2MHz
Input signal detection
Bass control
Professional Grade Performance:
SNR 60 dB
Stereo Separation > 40 dB
International compatible 76MHz ~ 108MHz
Ultra-Low Power Consumption:
< 17 mA operation current
< 3 µA standby current
Small Form factor:
24-pin QFN
Simple Interface:
Single power supply
Industry standard 2-wire I2C MCU
interface compatible
Advanced Digital Audio Signal Processing:
On-chip 20-bit ΔΣ Audio ADC
On-chip DSP core
On-chip 24dB PGA with optional 1dB step
Automatic calibration against process
and temperature
On-Chip LDO (low-drop-out) regulator:
Accommodates 1.6V ~ 3.6V supply
Programmable transmit level
Programmable pre-emphasis (50/75 µs)
Pb-free and RoHS Compliant
Applications
MP3 Player
Cellular Phone
PDA
Portable Personal Media player
Laptop Computer
Wireless Speaker
Rev. 1.0
Information furnished by KT Micro is believed to be accurate
and reliable. However, no responsibility is assumed by KT
Micro for its use, nor for any infringements of patents or
other rights of third parties which may result from its use. No
license is granted by implication or otherwise under any
patent or patent rights of KT Micro, Inc..
Figure 1: KT0801A System Diagram
ƒ General Description
KT0801A, our new generation of low cost Monolithic
Digital FM Transmitter, is designed to process high-fidelity
stereo audio signal and transmit modulated FM signal over
a short range. It’s based on the architecture of award-
winning KT0801 and it’s also an upgrade of KT0801. The
additional features added to KT0801A are increased
transmission power up to 113 dBuV, support of 32.768
KHz input clock and crystal, bass control and auto level
detection.
The KT0801A features dual 20-bit ΔΣ audio ADCs, a high-
fidelity digital stereo audio processor and a fully integrated
radio frequency (RF) transmitter. An on-chip low-drop-out
regulator (LDO) allows the chip to be integrated in a wide
range of low-voltage battery-operated systems with power
supply ranging from 1.6V to 3.6V.
The KT0801A is configured as an I2C slave and
programmed through the industry standard 2-wire MCU
interface.
.
Thanks to its high integration level, the KT0801A is
mounted in a generic 24-pin QFN package. It only requires
a single low-voltage supply. No external tuning is required
that makes design-in effort minimum.
KT Micro Inc., 22391 Gilberto, Suite D
Rancho Santa Margarita, CA 92688
Tel: 949.713.4000 http://www.ktmicro.com.cn
Fax: 949.713.4004 Copyright ©2009, KT Micro, Inc..

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KT0801A pdf
Figure 3: Serial Interface Protocol
KT0801A
CURRENT ADDRESS READ: The internal data register address counter maintains the last address
accessed during the last read or write operation, incremented by one. This address stays valid between
operations as long as the chip power is maintained.
Once the device address with the read/write select bit set to “1” is clocked in and acknowledged by the
KT0801A, the current address data word is serially clocked out. The microcontroller does not respond with
an input “0” but does generate a following stop condition (see Figure 4).
CURRENT REGISTER READ PROCEDURE
S 0 1 1 x 1 1 0 RA
7 bit address
data
Acknowledge
START condition READ command
AP
STOP condition
NO Acknowledge
Figure 4: Serial Interface Protocol
Note: The x is the optional 4th MSB bit address code that is set by the ADDR pin (pin 13) and is provided
to allow a dual-transmitter-single-controller configuration that will enable multi-channel surround sound
applications. ADDR (pin 13) must be externally tied to ground or IOVDD for low or high setup,
respectively. The serial controller supports slave mode only. Any register can be addressed randomly.
The address of the slave in the first 7 bits and the 8th bit tells whether the master is receiving data from the
slave or transmitting data to the slave. When ADDR is set to “0” (i.e. tied to ground), the I2C write address
is 0x6C and the read address is 0x6D. When ADDR is set to “1” (i.e. tied to power), the I2C write address
is 0x7C and the read address is 0x7D.
Slave Mode Protocol
With reference to the clocking scheme shown in Figure 5, the serial interface operates in the following
manner:
Figure 5: Serial Interface Slave Mode Protocol
CLOCK and DATA TRANSITIONS: The SDA pin is normally pulled high with an external device. Data
on the SDA pin may change only during SCL low time periods (see Figure 6). Data changes during SCL
high periods will indicate a start or stop condition as defined below.
START CONDITION: A high-to-low transition of SDA with SCL high is a start condition which must
precede any other command (see Figure 7).
STOP CONDITION: A low-to-high transition of SDA with SCL high is a stop condition. After a read
sequence, the stop command will place the KT0801A in a standby power mode (see Figure 7).
ACKNOWLEDGE: All addresses and data words are serially transmitted to and from the KT0801A in 8-
Copyright ©2009, KT Micro, Inc.
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KT0801A arduino
KT0801A
Bits Type Default Label
7 RW 1
SLNCDIS
6:4 RW 000
SLNCTHL
3:1 RW 000
SLNCTHH
0 RW 0
SW_MOD
Description
Silence detection disable
0 : enable
1 : disable
Silence detection low threshold
000 : 0.25mv
001 : 0.5mv
010 : 1mv
011 : 2mv
100 : 4mv
101 : 8mv
110 : 16mv
111 : 32mv
Silence detection high threshold
000 : 0.5mv
001 : 1mv
010 : 2mv
011 : 4mv
100 : 8mv
101 : 16mv
110 : 32mv
111 : 64mv
Switching channel mode selection.
0 = mute when changing channel
1 = pa off when changing channel
Register 0x13 (Address: 0x13, Default: 0x80)
Bit
KT0801A
KT0801
7
RFGAIN[2]
PA_HI_PW
6
-
-
54
--
3 21
-
PA_CTRL
-
- --
0
-
-
Bits Type Default Label
7 RW 1
RFGAIN[2]
Description
PA (Power amplifier) power (combined with Reg
0x01[7:6] and Reg 0x02[6])to set up transmission range)
6:3 RW
2 RW
0000
0
Reserved
PA_CTRL
1:0 RW 00
Reserved
Power amplifier structure selection
0 = PA powered by internal power supply, KT0801
compatible
1 = PA powered by external power supply via
external inductor
Note: When external inductor is used, this bit
must be set to 1 immediately after the Power OK
indicator is set to 1. Otherwise, the device may
be damaged!
Register 0x14 (Address: 0x14, default 0x00) - New
Bit
KT0801A
KT0801
76
5
SLNCTIME<2:0>
--
-
43
SLNCCNTHIGH<2:0>
--
2
-
10
--
--
Bits Type Default Label
Description
Copyright ©2009, KT Micro, Inc.
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