SAA8116 Datasheet, PDF (45/60 Pages) NXP Semiconductors – Digital PC-camera signal processor including microcontroller and USB interface

Philips Semiconductors
Digital PC-camera signal processor including
microcontroller and USB interface
Product specification
SAA8116
Table 53 Register SELECT_EP0_OUT (address: 0x00H)
Detailed description of the optional read (1 byte) following command 0x00H; note 1
BIT
76543210
PARAMETER
XXX
reserved
SENT_NAK:
0
a NAK is not sent (by default)
1
a NAK is sent by the device
PACKET_OVERWRITTEN:
0
not overwritten (by default)
1
the previously received packet was overwritten by a setup packet
SETUP_PACKET: give the status of the last received packet
0
not a setup packet (by default)
1
last received packet for the selected EP was a setup packet
STALL_PACKET: give the status of the selected EP
0
not stall (by default)
1
stall
BUFFER_STATUS: give the EP buffer status; note 2; this bit is cleared by
executing the SET_BUFFER_FE command
0 buffer not full (by default)
1 buffer of the selected EP is full
Notes
1. The SELECT_EPX_XX command selects the corresponding EP buffer. It can be followed optionally by a data read,
which provides the EP status to the microcontroller (see the detailed description above). Whatever the EP (from 0
to 3) or its direction, the sequence is the same. Note that isochronous EP cannot be selected in this way.
2. BUFFER_STATUS: in case of an IN endpoint; this bit is set by the VALIDATE_BUFFER command.
Table 54 Register GET_INTERRUPT (address: 0xF4H)
Detailed description of the read (1 byte) following command 0xF4H
BIT
76543210
PARAMETER
X
DEVICE_EVENT: an event occurred in the device
X
PHYSICAL_EP6: interrupt signal comes from (logic) EP4
X
PHYSICAL_EP5: interrupt signal comes from (logic) EP3
X
PHYSICAL_EP4: interrupt signal comes from (logic) EP2
X
PHYSICAL_EP3: interrupt signal comes from (logic) EP1 in
X
PHYSICAL_EP2: interrupt signal comes from (logic) EP1 out
X
PHYSICAL_EP1: interrupt signal comes from (logic) EP0 in
X PHYSICAL_EP0: interrupt signal comes from (logic) EP0 out
2001 May 04
45