Serial Peripheral Interface (SPI) Port
1-18
ADSP-BF537 Blackfin Processor Hardware Reference
Serial Peripheral Interface (SPI) Port
The processor has an SPI-compatible port that enables the processor to
communicate with multiple SPI-compatible devices.
The SPI interface uses three pins for transferring data: two data pins and a
clock pin. An SPI chip select input pin lets other SPI devices select the
processor, and seven SPI chip select output pins let the processor select
other SPI devices. The SPI select pins are reconfigured general-purpose
I/O pins. Using these pins, the SPI port provides a full-duplex, synchro-
nous serial interface, which supports both master and slave modes and
multimaster environments.
The SPI port’s baud rate and clock phase/polarities are programmable,
and it has an integrated DMA controller, configurable to support either
transmit or receive datastreams. The SPI’s DMA controller can only ser-
vice unidirectional accesses at any given time.
During transfers, the SPI port simultaneously transmits and receives by
serially shifting data in and out of its two serial data lines. The serial clock
line synchronizes the shifting and sampling of data on the two serial data
lines.
Timers
There are nine general-purpose programmable timer units in the proces-
sor. Eight timers have an external pin that can be configured either as a
Pulse Width Modulator (PWM) or timer output, as an input to clock the
timer, or as a mechanism for measuring pulse widths of external events.
These timer units can be synchronized to an external clock input con-
nected to the
PF1
pin, an external clock input to the
PPI_CLK
pin, or to the
internal
SCLK
.
Summary of Contents for Blackfin ADSP-BF537
Page 42: ...Contents xlii ADSP BF537 Blackfin Processor Hardware Reference ...
Page 90: ...Development Tools 1 32 ADSP BF537 Blackfin Processor Hardware Reference ...
Page 138: ...Programming Examples 4 26 ADSP BF537 Blackfin Processor Hardware Reference ...
Page 340: ...SDC Programming Examples 6 84 ADSP BF537 Blackfin Processor Hardware Reference ...
Page 606: ...Programming Examples 9 94 ADSP BF537 Blackfin Processor Hardware Reference ...
Page 660: ...Programming Examples 10 54 ADSP BF537 Blackfin Processor Hardware Reference ...
Page 720: ...Electrical Specifications 11 60 ADSP BF537 Blackfin Processor Hardware Reference ...
Page 840: ...Programming Examples 13 42 ADSP BF537 Blackfin Processor Hardware Reference ...
Page 876: ...Programming Examples 14 36 ADSP BF537 Blackfin Processor Hardware Reference ...
Page 938: ...Programming Examples 15 62 ADSP BF537 Blackfin Processor Hardware Reference ...
Page 958: ...Programming Examples 17 12 ADSP BF537 Blackfin Processor Hardware Reference ...
Page 986: ...Programming Examples 18 28 ADSP BF537 Blackfin Processor Hardware Reference ...
Page 1162: ...G 26 ADSP BF537 Blackfin Processor Hardware Reference ...
Page 1218: ...Index I 56 ADSP BF537 Blackfin Processor Hardware Reference ...