sta8088ex STMicroelectronics, sta8088ex Datasheet - Page 20

• Manufacturer Part Number: sta8088ex
• Description: High Flexible Gps/galileo/glonass/qzss Receiver With Powerful Processing Arm9
• Manufacturer: STMicroelectronics

General description
3.4.3
20/29
EFT features
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SSP
The SSP is a master or slave interface for synchronous serial communication with
peripheral devices that have Motorola SPI, National Semiconductor MicroWire or Texas
Instruments Synchronous Serial Interfaces.
The SSP performs serial-to-parallel conversion on data received from a peripheral device on
SSPRXD pin, and parallel-to-serial conversion on data written by CPU for transmission on
SSPTXD pin. The transmit and receive paths are buffered with internal FIFO memories
allowing up to 32 x 32-bit values to be stored independently in both transmit and receive
modes. FIFOs may be burst-loaded or emptied by the system processor or DMA, from one
to eight words per transfer. Each 32-bit word from the system fills one entry in FIFO.
The SSP includes a programmable bit rate clock divider and prescaler to generate the serial
output clock SSPCLK from the on-chip clock, SSPCLKI. One combined interrupt is
delivered, which is asserted from several internal maskable events.
Programmable prescaler: fAPB divided from 1 to 256, prescaler register (0 to 255)
value +1.
Overflow status flag and maskable interrupts.
External clock input (must be at least 4 times slower than the CPU clock speed) with
the choice of an active edge.
Output compare functions with:
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Input capture functions with:
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Pulse Width Modulation mode (PWM).
One Pulse Mode (OPM).
PWM input mode.
Timer global interrupt (5 internally ORed)
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2 dedicated 16-bit registers
2 dedicated programmable signals
2 dedicated status flags
2 dedicated interrupt flags
2 dedicated 16-bit registers
2 dedicated active edge selection signals
2 dedicated status flags
2 dedicated interrupt flags
ICIA: timer input capture A interrupt
ICIB: timer input capture B interrupt
OCIA: timer output compare A interrupt
OCIB: timer output compare B interrupt
TOI: timer overflow interrupt
Doc ID 18357 Rev 1
STA8088EX