Holtek BA45F56 Series, Описание функции

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BA45F56xx Wireless Transceiver Application
AN0571EN V1.00 2 / 14 November 5, 2020

ISINK0/1 provide a constant infrared emission current, A0PI and A0NI process the infrared
received signal

ISINK0/1 constant current output is adjustable

Two sets of ISINK for use by different types of smoke – white/black smoke

RF circuit includes the antenna and input/output matching circuit

Time-division duplex (TDD) method must be used for RF signal transmission and reception -
only transmission or reception can be performed at a time

RF transmission
Digital packet regulator → Gaussian filter → ΣΔ Modulator → Frequency synthesis → High
power amplifier → Antenna

RF reception
Antenna → Low noise amplifier → Intermediate frequency(IF) → Intermediate frequency
composite band-pass filter → Signal strength detector → Digital packet demodulator
Operating Principles
Communication Pin Description
NC
NC
CLDO
GIO4
NC
PA
0/S
CK
/S
CL
/ICP
DA
/O
CD
SDA
SDI
O
PA
2/S
DI
/S
DA
/RX
/ICP
CK
/O
CD
SCK
PB0/INT0/SCS/STP/A0PB
A0PI
A0NI
PA5/STCK/A1O
XO V_
XO
EXT
LP EXT
LN V_
SX
V_
DI
G
PB
3/P
LR
X/S
DI
/S
DA
/RX
/GIO
2
NC
V_LNA
RFIN
VSSRF
RFOUT
PA
6/P
TP
/S
DI
/S
DA
/RX
/VR
EF
PA
7/ST
PI
/PT
PI
/S
CK
/S
CL
/AN
1
PA
3/S
DO
/T
X/PT
PB
/AN
3
PB
4/S
CS
NC NC
IS
IN
K0
NC
IS
IN
K1
PB
2/P
LI
S/S
CK
(*)
/S
CL
CS
N
GIO
1 CL
DO
XI PA
4/P
TCK
/ST
PB
/AN
0/A
0O
PA
1/IN
T1
/S
CS
/AN
2/A
1PI
NC PB
1/P
LT
X
/S
DO
/T
X
VSS
NC
VDD
VSS
BA45F5640
BA45V5640
46 QFN-A
1
2
3
4
5
6
7
8
9
10 111213 1415 161718 19 202122
34 35 36 37 38 39
23
24
25
26
27
28
29
30
31
32
33 40 41 42 43 44 45 46
Figure 2. BA45F5640 Pin Assignment