CC256X Datasheet, PDF (13/51 Pages) Texas Instruments – Bluetooth® Smart Ready Controller

CC256x
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3.3.4 I/O States In Various Power Modes
SWRS121C – JULY 2012 – REVISED OCTOBER 2013
CAUTION
Some device I/Os are not fail-safe (see ). Fail-safe means that the pins do not draw
current from an external voltage applied to the pin when I/O power is not supplied to the
device. External voltages are not allowed on these I/O pins when the I/O supply voltage
is not supplied because of possible damage to the device.
I/O Name
Shut Down⁽¹⁾
Default Active⁽¹⁾
I/O State
Pull
I/O State
Pull
HCI_RX
Z
PU
I
PU
HCI_TX
Z
PU
O-H
—
HCI_RTS
Z
PU
O-H
—
HCI_CTS
Z
PU
I
PU
AUD_CLK
Z
PD
I
PD
AUD_FSYNC
Z
PD
I
PD
AUD_IN
Z
PD
I
PD
AUD_OUT
Z
PD
Z
PD
TX_DBG
Z
PU
O
—
(1) I = input, O = output, Z = Hi-Z, — = no pull, PU = pullup, PD = pulldown, H = high, L = low
Deep Sleep⁽¹⁾
I/O State
Pull
I
PU
O
—
O
—
I
PU
I
PD
I
PD
I
PD
Z
PD
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