STA8100GA datasheet(17/42 Pages) STMICROELECTRONICS

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DS13006 Rev 4

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STA8100GA

General description

RTC features:

•

47-bit counter clocked by 32.768 kHz clock

•

32-bit for the integer part (seconds) and 15-bit for the fractional part

•

The integer part and the fractional part are readable independently

•

The counter, once enabled, can be stopped

•

Integer part load register (32-bit)

•

Fractional part load register (15-bit)

•

Load bit to transfer the content of the entire load register (integer + fractional part) to

the 47-bit counter

Once set by the MCU, this bit is cleared by the hardware to signal to the MCU that the RTC

has been updated.

3.14

MSP

STA8100GA has one Multi mode Serial Port (MSP).

The following section describes the functionalities of the MSP unit.

The Multi mode Serial Port (MSP) is a synchronous transmitter serial interface.

The MSP provides:

•

Element (data) sizes of 8, 10, 12, 14, 16, 20, 24, and 32 bits, LSB or MSB first

•

Programmable frequency shift clock for data transfer

•

Direct interface to SPI compliant devices

•

Transmit first-in, first-out memory buffers (FIFOs), 32 bits wide, 8 locations deep

3.15

Direct Memory Access (DMA)

The DMAC is an Advanced Microcontroller Bus Architecture (AMBA) compliant System-on-

Chip (SoC) peripheral. The DMAC is an AMBA AHB module, and connects to the Advanced

High-performance Bus (AHB).

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