CC2564C Datasheet, PDF (13/52 Pages) Texas Instruments – CC2564C Dual-Mode Bluetooth Controller

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nSHUTD
VDD_IO
20 µs max
CC2564C
SWRS199A – APRIL 2016 – REVISED NOVEMBER 2016
Shut down
before
VDD_IO
removed
VDD_IN
SLOW CLOCK
FAST CLOCK
HCI_RTS
2 ms max
20 ms max
± 100 ms
CC256x ready
Copyright © 2016, Texas Instruments Incorporated
Figure 5-1. Power-Up and Power-Down Sequencing
5.8.1.3 Power Supplies and Shutdown—Static States
The nSHUTD signal puts the device in ultra-low-power mode and performs an internal reset to the device.
The rise time for nSHUTD must not exceed 20 µs; nSHUTD must be low for a minimum of 5 ms.
To prevent conflicts with external signals, all I/O pins are set to the high-impedance (Hi-Z) state during
shutdown and power up of the device. The internal pull resistors are enabled on each I/O pin, as
described in Section 4.1.1. Table 5-1 lists and describes the static operation states.
Table 5-1. Power Modes
VDD_IN ⁽¹⁾
VDD_IO ⁽¹⁾
nSHUTD ⁽¹⁾
PM_MODE
COMMENTS
1
None
None
Asserted
Shutdown
I/O state is undefined. No I/O voltages
are allowed on nonfail-safe pins.
2
None
None
Deasserted
Not allowed
I/O state is undefined. No I/O voltages
are allowed on nonfail-safe pins.
3
None
Present
Asserted
Shutdown
I/Os are defined as tri-state pins with
internal pullup or pulldown enabled.
4
None
Present
Deasserted
Not allowed
I/O state is undefined. No I/O voltages
are allowed on nonfail-safe pins.
5
Present
None
Asserted
Shutdown
I/O state is undefined.
6
Present
None
Deasserted
Not allowed
I/O state is undefined. No I/O voltages
are allowed on nonfail-safe pins.
7
Present
Present
Asserted
Shutdown
I/Os are defined as tri-state pins with
internal pullup or pulldown enabled.
8
Present
Present
Deasserted
Active
See Section 5.8.1.4.
(1) The terms None or Asserted can imply any of the following conditions: directly pulled to ground or driven low, pulled to ground through a
pulldown resistor, or left NC or floating (high-impedance output stage).
Copyright © 2016, Texas Instruments Incorporated
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