ADSP-214xx SHARC Processor Hardware Reference A-239
Registers Reference
Baud Rate Registers (SPIBAUD, SPIBAUDB)
These SPI registers are used to set the bit transfer rate for a master device.
When configured as slaves, the value written to these registers is ignored.
The (
SPIBAUDx) registers can be read from or written to at any time. Bit
descriptions are provided in Table A-124. Note that the minimum value
of BAUDR = 0x2, since the max SPICLK = PCLK/4 in master mode.
14 (RO) SPIERRS DMA Error Status. This bit is set if SPIOVF, SPIUNF or
DPIMME bits are set.
0 = Successful DMA transfer
1 = Errors during DMA transfer
15 (RO) SPIDMAS DMA Transfer Status.
0 = DMA idle
1 = DMA in progress
16 (RO) SPICHS DMA Chain Loading Status.
0 = Chain idle
1 = Chain loading in progress
31–17 Reserved
Table A-124. SPIBAUD, SPIBAUDB Register Bit Descriptions (RW)
Bit Name Description
0 Reserved
15–1 BAUDR Baud Rate Enable. Enables the SPICLK per the equation:
SPICLK baud rate = PCLK /(4 x BAUDR)
Default = 0
19–16 Reserved
25–20 STDC Sequential Transfer Delay. The word to word delay(T4) = 1.5 SPI
CLK Period + T3 and T3 = 0.5 SPICLK period for STDC = 0.
T3 = STDC × SPICLK period for STDC > 0.
31–26 Reserved
Table A-123. SPIDMAC, SPIDMACB Register Bit Descriptions
(RW) (Cont’d)
Bit Name Description
To Next Page
Loading...
Need help?
General
