Cypress Semiconductor FX2LP Technical Information Seite 176

  • Herunterladen
  • Zu meinen Handbüchern hinzufügen
  • Drucken
  • Seite
    / 460
  • Inhaltsverzeichnis
  • LESEZEICHEN
  • Bewertet. / 5. Basierend auf Kundenbewertungen
Seitenansicht 175
EZ-USB FX2 Technical Reference Manual
Page 9-20 EZ-USB FX2 Technical Reference Manual v2.1
Figure 9-25. EPxFIFOBUF Registers
9.3.2 EPx Memories
The slave FIFOs connect external logic to the FX2’s four endpoint memories (EP2, EP4, EP6, and
EP8). These endpoint memories have the following programmable features:
1. Type can be either BULK, INTERRUPT, or ISOCHRONOUS.
2. Direction can be either IN or OUT.
3. For EP2 and EP6, size can be either 512 or 1024 bytes. EP4 and EP8 are fixed at 512 bytes.
4. Buffering can be 2x, 3x, or 4x for EP2 and EP6. EP4 and EP8 are fixed at 2x.
5. FX2 automatically commits endpoint data to and from the slave FIFO interface (AUTOIN=1,
AUTOOUT=1).
At power-on-reset, these endpoint memories are configured as follows:
1. EP2 - Bulk OUT, 512 bytes/packet, 2x buffered.
2. EP4 - Bulk OUT, 512 bytes/packet, 2x buffered.
3. EP6 - Bulk IN, 512 bytes/packet, 2x buffered.
4. EP8 - Bulk IN, 512 bytes/packet, 2x buffered.
FLAGA
FIFOADR[1:0]
Slave FIFOs FX2 Registers Device Pins
FLAGB
FLAGC
FLAGD/SLCS#
SLOE
SLRD
SLWR
PKTEND
FD[15:0]
EP4FIFOBUF
EP6FIFOBUF
EP8FIFOBUF
EP2FIFOBUF
EP8
EP6
EP4
EP2
IFCLK
30/48MHz
5 - 48MHz
Seitenansicht 175
1 2 ... 171 172 173 174 175 176 177 178 179 180 181 ... 459 460

Kommentare zu diesen Handbüchern

Keine Kommentare