Connections For Unused Pins And Modules - Texas Instruments SimpleLink CC2652RB Manual

CC2652RB
SWRS232D – FEBRUARY 2019 – REVISED FEBRUARY 2021
PIN
NAME NO.
VDDR 45
VDDR_RF 48
VDDS 44
VDDS2 13
VDDS3 22
VDDS_DCDC 34
X48M_N 46
X48M_P 47
X32K_Q1 3
X32K_Q2 4
(1) For more details, see technical reference manual listed in
(2) Do not supply external circuitry from this pin.
(3) EGP is the only ground connection for the device. Good electrical connection to device ground on printed circuit board (PCB) is
imperative for proper device operation.
(4) If internal DC/DC converter is not used, this pin is supplied internally from the main LDO.
(5) If internal DC/DC converter is not used, this pin must be connected to VDDR for supply from the main LDO.
(6) Output from internal DC/DC and LDO is trimmed to 1.68 V.
(7) The X48M_N and X48M_P pins can be used to connect an external 48-MHz crystal. This clock can be used instead of the internal
BAW clock. However, it is not required for the device standard operation.

7.3 Connections for Unused Pins and Modules

FUNCTION
GPIO
32.768-kHz crystal
(2)
DC/DC converter
48-MHz crystal
(1) NC = No connect
(2) When the DC/DC converter is not used, the inductor between DCDC_SW and VDDR can be removed. VDDR and VDDR_RF must still
be connected and the 22 uF DCDC capacitor must be kept on the VDDR net.
(3) When operating in external regulator mode.
10 Submit Document Feedback
Table 7-1. Signal Descriptions – RGZ Package (continued)
I/O TYPE
— Power
— Power
— Power
— Power
— Power
— Power
— Analog
— Analog
— Analog
— Analog
Table 7-2. Connections for Unused Pins
SIGNAL NAME PIN NUMBER
DIO_n
X32K_Q1
X32K_Q2
DCDC_SW
VDDS_DCDC
X48M_N
X48M_P
Product Folder Links:
Internal supply, must be powered from the internal DC/DC
converter or the internal LDO. For external regulator mode (1.7-V to
1.95-V operation), connect to external regulator and internal DC-
(2) (4) (6)
DC cannot be used.
Internal supply, must be powered from the internal DC/DC
converter or the internal LDO
1.8-V to 3.8-V main chip supply. For external regulator mode (1.7-V
to 1.95-V operation), connect to external regulator and internal DC-
(1)
DC cannot be used.
1.8-V to 3.8-V DIO supply
1.8-V to 3.8-V DIO supply
1.8-V to 3.8-V DC/DC converter supply. Tie to ground for external
regulator mode (1.7-V to 1.95-V operation).
48-MHz crystal oscillator pin 1. Do not connect if not in use.
(7)
(Optional)
48-MHz crystal oscillator pin 2. Do not connect if not in use.
(7)
(Optional)
32-kHz crystal oscillator pin 1
32-kHz crystal oscillator pin 2
Section 11.2.
ACCEPTABLE PRACTICE
5–12
14–21
NC or GND
26–32
36–43
3
NC or GND
4
33 NC
34 VDDS (GND)
46 NC
47 NC
CC2652RB
DESCRIPTION
(2) (5) (6)
(1)
(1)
PREFERRED
(1)
PRACTICE
NC
NC
NC
(3)
VDDS (GND)
NC
NC
Copyright © 2021 Texas Instruments Incorporated
www.ti.com
(1)
(3)