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Functional Overview
47
SWRU543–January 2019
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Copyright © 2019, Texas Instruments Incorporated
Architecture Overview
• Fully programmable serial interface characteristics:
– 5, 6, 7, or 8 data bits
– Even, odd, stick, or no-parity bit generation and detection
– 1 or 2 stop-bit generation
• RTS and CTS modem handshake support
• Standard FIFO-level and end-of-transmission interrupts
• Efficient transfers using µDMA
– Separate channels for transmit and receive
– Receive single request asserted when data is in the FIFO; burst request asserted at programmed
FIFO level
– Transmit single request asserted when there is space in the FIFO; burst request asserted at
programmed FIFO level
1.3.10 General-Purpose Input/Output (GPIO)
All digital pins of the CC32xx device and some of the analog pins can be used as a general-purpose
input/output (GPIO). The GPIOs are grouped as four instance GPIO modules, each 8-bit. Supported
features include:
• Up to 28 GPIOs, depending on the functional pin configuration
• Interrupt capability for all GPIO pins:
– Level or edge sensitive
– Rising or falling edge
– Selective interrupt masking
• Can trigger DMA operation
• Selectable wakeup source (one out of six pins)
• Programmable pad configuration:
– Internal 5-µA pullup and pulldown
– Configurable drive strength of 2 mA, 4 mA, and 6 mA
– Open-drain mode
• GPIO register readable through the high-speed internal bus matrix
1.3.11 Analog-to-Digital Converter (ADC)
The analog-to-digital converter (ADC) peripheral converts a continuous analog voltage into a discrete
digital number. The CC32xx device includes ADC modules with four input channels. Each ADC module
features 12-bit conversion resolution for the four input channels. Features include:
• Number of bits: 12-bit
• Effective nominal accuracy: 10 bits
• Four analog input channels
• Automatic round-robin sampling
• Fixed sampling interval of 16 µs per channel
• Automatic 16-bit time-stamping of every ADC samples based on the system clock
• Dedicated DMA channel to transfer ADC channel data to the application RAM.
1.3.12 SD Card Host
The CC32xx includes an SD-Host interface for applications that require mass storage. The SD-Host
interface support is currently limited to 1-bit mode.
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