Texas Instruments SimpleLink CC2652RB, Руководство пользователя

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Table 7-1. Signal Descriptions – RGZ Package (continued)
PIN
I/O TYPE DESCRIPTION
NAME NO.
VDDR 45 — Power
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-
DC cannot be used.
(2) (4) (6)
VDDR_RF 48 — Power
Internal supply, must be powered from the internal DC/DC
converter or the internal LDO
(2) (5) (6)
VDDS 44 — Power
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-
DC cannot be used.
(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. Tie to ground for external
regulator mode (1.7-V to 1.95-V operation).
X48M_N 46 — Analog
48-MHz crystal oscillator pin 1. Do not connect if not in use.
(Optional)
(7)
X48M_P 47 — Analog
48-MHz crystal oscillator pin 2. Do not connect if not in use.
(Optional)
(7)
X32K_Q1 3 — Analog 32-kHz crystal oscillator pin 1
X32K_Q2 4 — Analog 32-kHz crystal oscillator pin 2
(1) For more details, see technical reference manual listed in Section 11.2 .
(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
Table 7-2. 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 (GND)
(3)
VDDS (GND)
(3)
48-MHz crystal
X48M_N 46 NC NC
X48M_P 47 NC NC
(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.
CC2652RB
SWRS232D – FEBRUARY 2019 – REVISED FEBRUARY 2021
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