Preliminary
HT9015
Pin No.
Pin Name
VCC3
I/O
¾
I
Description
Positive power supply for digital block circuits.
7
8
LO1
This pin connects to LO2 pin with external crystal and capacitor.
This output pin generates a reference frequency used for the
PLL and the second mixer local oscillator when connected to
LO1 pin with an external crystal and capacitor.
9
LO2
O
O
This pin outputs four-type states and is selected by an internal
control register. There are RSSI state and noise state and RX/TX
PLL lock states.
10
SIG_OUT
Open drain output.
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
CLK
I
I
Clock input pin
DATA
Serial data input pin
STB
I
Data strobe control pin
FIL_OUT
FIL_IN
COMP_OUT
C_NF
O
I
Splatter filter output pin
Splatter filter input pin
O
¾
O
I
Compressor output pin
Normally connected to ground through a capacitor.
Microphone amplifier output pin
Microphone amplifier input pin
Pre-amplifier input pin
MIC_OUT
MIC_IN
PRE_IN
PRE_OUT
EXP_OUT
RECE_IN
RO1
I
O
O
I
Pre-amplifier output pin
Expander output pin
Receiver amplifier input pin
Receiver amplifier output pin
Receiver amplifier output pin
O
O
RO2
Battery alarm output pin. When the battery voltage is lower
than the internal setting threshold this pin is active.
Open drain output.
26
BAT_ALM
O
Receiver signal strength indicator output pin, the output signal
depends on the IF amplifier output signal.
27
28
29
RSSI
O
O
I
D_COMP_OUT
D_COMP_IN
Data comparator output pin
Data comparator input pin. Input to comparator to distinguish
digital data from audio.
30
31
N_FIL_IN
I
Input to noise filter
N_FIL_OUT
O
Output from noise filter
4
April 10, 2000
HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
