pnx1700 NXP Semiconductors, pnx1700 Datasheet - Page 494

• Manufacturer Part Number: pnx1700
• Description: Connected Media Processor
• Manufacturer: NXP Semiconductors

Philips Semiconductors
Volume 1 of 1
PNX17XX_SER_1
Preliminary data sheet
Figure 3:
8-bit data input to FGPI
1
a
Input data width not equal to sample size setting
a+4
2
FGPI_CTL.SAMPLE_SIZE = 32-bit
a+8
2.2 Base Addresses
2.3 Sample (data) Size
2.4 Record or Message Size
3
Remark: SOFTWARE_RESET does not reset MMIO bus interface registers. Any
DMA transfers will be aborted during a SOFTWARE_RESET. All registers are reset to
the Reset Value shown in the Register Description section.
Two base address registers are used to point to main memory buffers in a double
buffering scheme. Addresses are forced into 32-bit address alignment.
Data size (width) per sample is set to either 8, 16, or 32 bits using
FGPI_CTL.SAMPLE_SIZE bit field. For 8-bit samples, four samples are packed into
one 32-bit word. For 16-bit samples, two samples are packed 2 into one 32-bit word.
Byte order, with which the data is written to memory, is controlled by the global
PNX17xx Series endian mode. The endian state only affects 16 and 32-bit sample
sizes.
Figure 3
match the setting of the FGPI_CTL.SAMPLE_SIZE bit field. Settings for the PNX17xx
Series Input Router will affect the “unknown data” received.
In record mode:
In message mode:
a+12
4
The number of samples per record is set by FGPI_REC_SIZE field. This is the
amount of samples that will be captured after each record start event.
Maximum number of samples per message is set by FGPI_REC_SIZE field. The
end of a message is signaled by the active fgpi_stop edge. If the message length
is greater than the programmed value in the FGPI_REC_SIZE register, the
message is truncated and a OVERFLOW interrupt is generated.
bit 31
bit 0
shows how data is stored in memory if data input to the FGPI does not
16-bit data input
1
a
Rev. 1 — 17 March 2006
a+4
2
Chapter 14: FGPI: Fast General Purpose Interface
FGPI_CTL.SAMPLE_SIZE = 16-bit
8-bit data input to FGPI
2
1
a
a+4
3
4
© Koninklijke Philips Electronics N.V. 2006. All rights reserved.
PNX17xx Series
memory address
unknown
data
14-7