ANNA-B4 series - System integration manual
UBX-21000517 - R03
Contents
Page 8 of 74
C1-Public
1.4
Block diagrams
A block diagram of the ANNA-B4x2 module is shown in
☞
Not all interfaces are supported by the u-connectXpress software in ANNA-B412 variants.
For information about the interfaces supported specifically in ANNA-B412, see also the
ANNA-B412 data sheet
Figure 2: ANNA-B4x2 block diagram
The ANNA-B4 System in Package (SiP) module has an integrated antenna. The
“
RF pin
”
can either be
connected directly to the adjacent
“A
ntenna pin
”
to use the internal antenna. Otherwise, it can be
routed to an external antenna or antenna connector. When using the internal antenna, a counterpoise
trace must be routed on the main PCB and
connected to “Antenna PCB”
pin.
To achieve the lowest possible power consumption in stand-by mode ANNA-B4 has the possibility to
connect an optional external 32.768 kHz LPO crystal or oscillator.
VCC_IO (1.7
–
3.6 V)
DC/DC and LDO regulators
512 kB flash
Bluetooth LE
baseband
IO
b
uf
fer
s
A
rm
®
C
or
te
x®
-M4
wi
th
FP
U
PLL
VCC (1.7
–
3.6 V)
32 MHz
Reset
UART
SPI
GPIO
1.3 V
System
power
I2C
PWM
I2S
ADC and
comparator
Analog
Passive NFC tag
NFC
128 kB
RAM
PLL
32.768 kHz
RTC, timers
and counters
RF
Nordic nRF52833
USB device
USB 2.0
QDEC
PDM
Antenna
Antenna PCB
Antenna pin
RF pin
ANNA-B4x2