CC2640 datasheet(12/65 Pages) TI2

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CC2640

SWRS176B – FEBRUARY 2015 – REVISED JULY 2016

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Terminal Configuration and Functions

Table 4-3. Signal Descriptions – RSM Package (continued)

NAME

NO.

TYPE

DESCRIPTION

(3)

If internal DC-DC is not used, this pin is supplied internally from the main LDO.

(4)

If internal DC-DC is not used, this pin must be connected to VDDR for supply from the main LDO.

RX_TX

RF I/O

Optional bias pin for the RF LNA

VDDR

Power

1.7-V to 1.95-V supply, typically connect to output of internal DC-DC. (2)(3)

VDDR_RF

Power

1.7-V to 1.95-V supply, typically connect to output of internal DC-DC (2)(4)

VDDS

Power

1.8-V to 3.8-V main chip supply(1)

VDDS2

Power

1.8-V to 3.8-V GPIO supply(1)

VDDS_DCDC

Power

1.8-V to 3.8-V DC-DC supply. Tie to ground for external regulator mode

(1.7-V to 1.95-V operation).

VSS

3, 7, 17, 20,

Power

Ground

X32K_Q1

Analog I/O

32-kHz crystal oscillator pin 1

X32K_Q2

Analog I/O

32-kHz crystal oscillator pin 2

X24M_N

Analog I/O

24-MHz crystal oscillator pin 1

X24M_P

Analog I/O

24-MHz crystal oscillator pin 2

EGP

Power

Ground – Exposed Ground Pad

CC2640 Datasheet(PDF) 12 Page - Texas Instruments

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