ADUCM4050BCBZ-R7 datasheet(35/46 Pages) AD

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Data Sheet

ADuCM4050

Rev. A | Page 35 of 46

Beeper Driver

The ADuCM4050 MCU has an integrated audio driver for a

beeper. The beeper driver module in the ADuCM4050 MCU

generates a differential square wave of programmable frequency.

It drives an external piezoelectric sound component with two

terminals that connect to the differential square wave output.

The beeper driver consists of a module that can deliver

frequencies ranging from 8 kHz to approximately 0.25 kHz; the

minimum frequency is determined by the maximum value of a

divide register that can be programmed to 127. This results in a

beeper frequency of,

32.768 kHz/127 = 0.25802 kHz

The beeper driver allows programmable tone durations in 4 ms

increments. Pulse (single-tone) and sequence (multitone)

modes provide versatile playback options.

In sequence mode, the beeper can be programmed to play any

number of tone pairs from 1 to 254 (2 to 508 tones) or be

programmed to play forever (until stopped by the user).

Interrupts are available to indicate the start or end of any beep,

the end of a sequence, or when the sequence is nearing

completion.

Debug Capability

The ADuCM4050 MCU supports a 2-wire serial wire debug

(SWD) interface and trace feature via a single-wire viewer port.

The ADuCM4050 MCU also has a full flash patch and

breakpoint (FPB) unit with support for up to six hardware

breakpoints.

ON-CHIP PERIPHERAL FEATURES

The ADuCM4050 MCU contains a rich set of peripherals

connected to the core via several concurrent high bandwidth

buses, providing flexibility in system configuration as well as

excellent overall system performance (see Figure 1).

The ADuCM4050 MCU contains high speed serial ports, an

interrupt controller for flexible management of interrupts

from the on-chip peripherals or external sources, and power

management control functions to tailor the performance and

power characteristics of the MCU and system to many

application scenarios.

Serial Ports (SPORT)

The ADuCM4050 MCU provides two single-direction half

SPORTs or one bidirectional full SPORT. The synchronous

serial ports provide an inexpensive interface to a wide variety of

digital and mixed-signal peripheral devices such as Analog

Devices audio codecs, ADCs, and DACs. The serial ports

contain two data lines, a clock, and a frame sync. The data lines

can be programmed to either transmit or receive, and each data

line has a dedicated DMA channel.

Serial port data can be automatically transferred to and from

on-chip memory or external memory via dedicated DMA

channels. The frame sync and clock can be shared. Some of the

ADCs and DACs require two control signals for their

conversion processes. To interface with such devices,

SPT0_ACNV and SPT0_BCNV signals are provided. To use

these signals, enable the timer enable mode. In this mode, a

PWM timer inside the SPORT module generates the

programmable SPT0_ACNV and SPT0_BCNV signals.

Serial ports operate in two modes: the standard digital signal

processor (DSP) serial mode and timer enable mode.

SPI Ports

The ADuCM4050 MCU provides three SPIs. The SPI is an

industry-standard, full duplex, synchronous serial interface that

allows eight bits of data to be synchronously transmitted and

simultaneously received. Each SPI incorporates two DMA

channels that interface with the DMA controller. One DMA

channel transmits and the other receives. The SPI on the MCU

eases interfacing to external serial flash devices.

The SPI features include the following:

•

Serial clock phase mode and serial clock polarity mode

•

Loopback mode

•

Continuous transfer mode

•

Wire-OR’d output mode

•

Read command mode for half-duplex operation (transmit

followed by receive)

•

Flow control support

•

Multiple chip select (CS) line support

•

CS software override support

•

Support for 3-pin SPI

UART Ports

The ADuCM4050 MCU provides two full duplex UART ports

that are fully compatible with PC standard UARTs. The UART

port provides a simplified UART interface to other peripherals

or hosts, supporting full duplex, DMA supported, asynchronous

transfers of serial data. The UART port includes support for

five to eight data bits, and none, even, or odd parity. A frame

is terminated by one, one and a half, or two stop bits.

I2C

The ADuCM4050 MCU provides an I2C bus peripheral that has

two pins for data transfer. SCL (Pin P0_04) is a serial clock pin

and SDA (Pin P0_05) is a serial data pin. The pins are

configured in a wire-AND’ed format that allows arbitration in a

multimaster system. A master device can be configured to

generate the serial clock. The frequency is programmed by the

user in the serial clock divisor register. The master channel can

operate in fast mode (400 kHz) or standard mode (100 kHz).

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