CC2564MODACMOG datasheet(11/68 Pages) TI2

11 / 68 page

nSHUTD

VDD_IO

HCI_RTS

20 µs maximum

slow clock

CC256x ready

VDD_IN

2 ms maximum

SWRS160-008

±100 ms

Shut down

before

VDD_IO

removed

CC2564MODN, CC2564MODA

www.ti.com

SWRS160E – FEBRUARY 2014 – REVISED JANUARY 2017

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Product Folder Links: CC2564MODN CC2564MODA

Specifications

4.7

Timing and Switching Characteristics

4.7.1

Device Power Supply

The power-management hardware and software algorithms of the TI Bluetooth HCI module provide

significant power savings, which is a critical parameter in an MCU-based system.

The power-management module is optimized for drawing extremely low currents.

4.7.1.1

Power Sources

The TI Bluetooth HCI module requires two power sources:

•

VDD_IN: main power supply for the module

•

VDD_IO: power source for the 1.8-V I/O ring

The HCI module includes several on-chip voltage regulators for increased noise immunity and can be

connected directly to the battery.

4.7.1.2

Power Supply Sequencing

The device includes the following power-up requirements (see Figure 4-1):

•

nSHUTD must be low. VDD_IN and VDD_IO are don't-care when nSHUTD is low. However, signals

are not allowed on the I/O pins if I/O power is not supplied, because the I/Os are not fail-safe.

Exceptions are SLOW_CLK_IN and AUD_xxx, which are fail-safe and can tolerate external voltages

with no VDD_IO and VDD_IN.

•

VDD_IO and VDD_IN must be stable before releasing nSHUTD.

•

The slow clock must be stable within 2 ms of nSHUTD going high.

The device indicates that the power-up sequence is complete by asserting RTS low, which occurs up to

100 ms after nSHUTD goes high. If RTS does not go low, the device is not powered up. In this case,

ensure that the sequence and requirements are met.

Figure 4-1. Power-Up and Power-Down Sequence

CC2564MODACMOG Datasheet(PDF) 11 Page - Texas Instruments

CC2564MODACMOG Datasheet(HTML) 11 Page - Texas Instruments

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