Parts List/Tune Up Info

9
CC2642R
www.ti.com SWRS194G –JANUARY 2018 – REVISED APRIL 2020
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Terminal Configuration and Functions
Copyright © 2018–2020, Texas Instruments Incorporated
Table 4-1. Signal Descriptions – RGZ Package (continued)
PIN
I/O TYPE DESCRIPTION
NAME NO.
(4) If internal DC/DC converter is not used, this pin is supplied internally from the main LDO.
(5) Output from internal DC/DC and LDO is trimmed to 1.68 V.
(6) If internal DC/DC converter is not used, this pin must be connected to VDDR for supply from the main LDO.
VDDR 45 — Power
Internal supply, must be powered from the internal DC/DC
converter or the internal LDO
(4)(2) (5)
VDDR_RF 48 — Power
Internal supply, must be powered from the internal DC/DC
converter or the internal LDO
(6)(2) (5)
VDDS 44 — Power 1.8-V to 3.8-V main chip supply
(1)
VDDS2 13 — Power 1.8-V to 3.8-V DIO supply
(1)
VDDS3 22 — Power 1.8-V to 3.8-V DIO supply
(1)
VDDS_DCDC 34 — Power 1.8-V to 3.8-V DC/DC converter supply
X48M_N 46 — Analog 48-MHz crystal oscillator pin 1
X48M_P 47 — Analog 48-MHz crystal oscillator pin 2
X32K_Q1 3 — Analog 32-kHz crystal oscillator pin 1
X32K_Q2 4 — Analog 32-kHz crystal oscillator pin 2
(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.
4.3 Connections for Unused Pins and Modules
Table 4-2. Connections for Unused Pins
FUNCTION SIGNAL NAME PIN NUMBER
ACCEPTABLE
PRACTICE
(1)
PREFERRED
PRACTICE
(1)
GPIO DIO_n
5–12
14–21
26–32
36–43
NC or GND NC
32.768-kHz crystal
X32K_Q1 3
NC or GND NC
X32K_Q2 4
DC/DC converter
(2)
DCDC_SW 33 NC NC
VDDS_DCDC 34 VDDS VDDS