PNX1500E NXP Semiconductors, PNX1500E Datasheet - Page 496
PNX1500E
Manufacturer Part Number
PNX1500E
Description
Manufacturer
NXP Semiconductors
Datasheet
1.PNX1500E.pdf
(828 pages)
Specifications of PNX1500E
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PNX15XX_PNX952X_SER_N_4
Product data sheet
Figure 6:
must be low 1 clock
cycle before going active
must be high 1 clock
cycle before going active
Signal Edge Definition
clk
clk
3.1.2 Interrupt Service Routines
3.1.3 Optimized DMA Transfers
3.1.4 Terminating DMA Transfers
3.1.5 Signal Edge Definitions
Software must update the FGPI_BASEn register (where n is the number of the buffer
that interrupted with a buffer full interrupt) BEFORE clearing the buffer full interrupt
flag. This must be done even if the base address of the buffer does not change.
The DDR Memory controller used in the PNX15xx/952x Series is optimized for 128-
byte block transfers on 128-byte address boundaries. To keep Main Memory bus
traffic at a minimum the programmer should program the FGPI_BASE1 and
FGPI_BASE2 with bits [6:0] = 0000000 and program the FGPI_STRIDE to multiples
of 128.
During the next-to-last BUFnFULL interrupt service routine turn off (set to ‘0’) the
associated FGPI_CTL.CAPTURE_ENABLE_n bit.
During the last BUFnFULL interrupt service routine turn off (set to ‘0’) the associated
FGPI_CTL.CAPTURE_ENABLE_n bit, the FGPI is now IDLE.
The FGPI uses only the rising edge of clk_fgpi. If the negative edge of an external
clock needs to be used, program the PNX15xx/952x Series clock module to invert the
external clock for the FGPI.
sample point
sample point
(for pins: fgpi_start, fgpi_rec_start, fgpi_stop, fgpi_buf_start)
Rev. 4.0 — 03 December 2007
RISING EDGE
FALLING EDGE
Chapter 14: FGPI: Fast General Purpose Interface
PNX15xx/952x Series
© NXP B.V. 2007. All rights reserved.
14-496
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