STLC4420A 查看數據表（PDF） - STMicroelectronics
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STLC4420A Datasheet PDF : 40 Pages
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STLC4420A
Pin descriptions
Table 1. STLC4420A signal descriptions (continued)
Pin name Pin number
Type
Internal
resistor
Function
VI2C
D22
VIO
B20
V1OUT
N15
V2OUT
M12
V2XOUT
B14
V4OUT
M16
V4_OUTSEL G24
FB_V2
M11
FB_V2X
C14
EMU_CREF J23
Digital supply
input
Supply input
(1.8 V)
Regulator output
Regulator output
Regulator output
Regulator output
1.8 V digital input
Regulator sense
Regulator sense
Analog reference
IRES
J24
Analog reference
VDDA
A1, A2, A3,
A8, A11, H2,
N7, N12
Analog supply
input
VDDA_SYNTH K1
VDDS_PRESR K3
VCC_LNA
B13
HB_VPA
M15
LB_VBA
N17
VDDA_PLL M13
3.0 V digital
output
3.0 V digital
output
Analog supply
input
Digital 1.8V I/O power supply input pin
dedicated to the EMU I2C bus interface.
Connect to ground if the I2C interface of the
EMU is not connected (EMU_SCL,
EMU_SDA)
-
Host digital I/O supply input for SPI and
Bluetooth interfaces.
-
Linear regulator 1.8V output.
-
Linear regulator 1.8V output.
-
Linear regulator 1.2V output.
Linear regulator output selectable for 2.81V
-
or 3.11V. Output voltage controlled by
V4_OUTSEL pin G24.
-
Control input for selection of V4OUT regulator
output voltage. Logic 0 = 0=2.81V, 1= 3.11V
-
Sense line for V2 regulator. Connect to
V2OUT pin M12 with a short trace.
-
Sense line for V2X regulator. Connect to
V2XOUT pin B14 with a short trace.
Reference capacitor for internal Power
-
Management Unit (PMU). Connect a 1uF
capacitor to a solid board gound plane.
Reference resistor for the internal Power
Management Unit (EMU). Connect a 1MΩ
resistor to a solid board ground plane.
Analog 1.8V supply input pins. Decouple to a
solid ground plane using ceramic capacitors
-
located as close a possible to the appropriate
pins. Refer to evaluation platform
schematics.
High Band PA Enable
Low Band PA Enable
-
Phase Locked Loop supply = 1.8V
9/40
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