CC3200_15 Datasheet, PDF (20/71 Pages) Texas Instruments – CC3200 SimpleLink™ Wi-Fi® and Internet-of-Things Solution, a Single-Chip Wireless MCU

CC3200
SWAS032F – JULY 2013 – REVISED FEBRUARY 2015
www.ti.com
Table 3-1. Pin Multiplexing (continued)
Pkg Pin
General Pin Attributes
Pin Alias
Use Select as
Wakeup
Source
Config
Addl
Analog
Mux
Muxed Dig. Pin Mux Config
with
Reg
JTAG
Dig. Pin
Mux
Config
Mode
Value
Function
Signal Name
Signal
Description
Signal
Direction
LPDS⁽¹⁾
Pad States
Hib⁽²⁾ nRESET = 0
0
GPIO8
General-Purpose
I/O
I/O
6
SDCARD_IRQ Interrupt from SD
I
GPIO_PAD_CONFIG_
63
GPIO8
I/O
No
No
No
8
Card (Future
support)
Hi-Z
Hi-Z
Hi-Z
(0x4402 E0C0)
7
McAFSX I2S Audio Port
O
Frame Sync
12
GT_CCP06 Timer Capture
I
Port
0
GPIO9
General-Purpose
I/O
I/O
3
GT_PWM05 Pulse Width
O
Modulated O/P
64
GPIO9
I/O
No
No
GPIO_PAD_CONFIG_
No
9
6
(0x4402 E0C4)
SDCARD_ SD Cad Data
DATA0
I/O
Hi-Z
Hi-Z
Hi-Z
7
McAXR0 I2S Audio Port
I/O
Data (Rx/Tx)
12
GT_CCP00 Timer Capture
I
Port
65
GND_TAB
Thermal pad and
electrical ground
(1) LPDS mode: The state of unused GPIOs in LPDS is input with 500 kΩ pulldown. For all used GPIOs , the user can enable internal pulls, which would hold them in a valid state.
(2) Hibernate mode: The CC3200 device leaves the digital pins in a Hi-Z state without any internal pulls when the device enters hibernate state. This can cause glitches on output lines unless
held at valid levels by external resistors.
(3) To minimize leakage in some serial flash vendors during LPDS, TI recommends the user application always enable internal weak pulldowns on FLASH_SPI_DATA and FLASH_SPI_CLK
pins.
(4) This pin has dual functions: as a SOP[2] (device operation mode), and as an external TCXO enable. As a TXCO enable, the pin is an output on power up and driven logic high. During
hibernate low-power mode, the pin is in a high impedance state but pulled down for SOP mode to disable TCXO. Because of SOP functionality, the pin must be used as output only.
(5) Higher leakage current from the onboard serial flash can occur due to floating inputs when the device enters Hibernate mode. See reference schematics for recommended pull-up and
pull-down resistors.
(6) For details on proper use, see Section 3.2, Drive Strength and Reset States for Analog-Digital Multiplexed Pins.
(7) This pin is one of three that must have a passive pullup or pulldown resistor on board to configure the chip hardware power-up mode. For this reason, the pin must be output only when
used for digital functions.
(8) This pin is reserved for WLAN antenna selection, controlling an external RF switch that multiplexes the RF pin of the CC3200 device between two antennas. These pins should not be
used for other functionalities in general.
20
Terminal Configuration and Functions
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