
IC Data Sheets
8.
8.
IC Data Sheets
This chapter shows the internal block diagrams and pin
configurations of ICs that are drawn as “black boxes” in the
electrical diagrams (with the exception of “memory” and “logic”
ICs).
8.1
Diagram
, Si2157 (U18)
Figure 8-1 Internal block diagram and pin configuration
19830_300_152001.eps
152001
Block diagram
Pinning information
DSP
FILTER
ATV
DEMOD
I
ADC
Q
ADC
0 / 90
LOW-IF
FREQ
SYNTH
RF
AGC
LDO
IF
AGC
OUTPUT
IN
TERFACE
XOSC
XTA
L_
I
PGA
PGA
CON
TR
OL
IN
TE
RFA
CE
XTA
L_
O
XOU
T
ANTENNA
INPUT
GPI
O
3.3 V
1.8 V
DSP
FILTER
AGC
DTV
DEMOD
AV
SoC
RSTB
ADDR
SCL
SDA
DLIF
ATV
DEMOD
AGC
ALIF
GND
PAD
23
24
25
18
19
20
21
10
11
12
13
2
3
4
5
26
27
17
9
6
16
14
7
28
GN
D
VDD_IO
VDD_L
ALIF_P
ALIF_N
DLIF_P
RSTB
RF_IP
ADDR
SDA
SCL
VDD_H
RF_IN
RF_SHLD
XTAL
_O
DLIF_N
VDD_H
VDD_H
XTAL
_I
AGC1
GND
AG
C2
GPI
O2
XOU
T
1
22
15
8
GPI
O1
VDD_D
LDO_ADJ
RF_REF
Si2157