cp3bt26y98nepx National Semiconductor Corporation, cp3bt26y98nepx Datasheet - Page 106
cp3bt26y98nepx
Manufacturer Part Number
cp3bt26y98nepx
Description
Reprogrammable Connectivity Processor With Bluetooth-r, Usb, And Can Interfaces
Manufacturer
National Semiconductor Corporation
Datasheet
1.CP3BT26Y98NEPX.pdf
(280 pages)
- Current page: 106 of 280
- Download datasheet (5Mb)
www.national.com
FLUSH
IGN_IN
18.3.27 Transmit Data 0 Register (TXD0)
Data written to the TXD0 register is copied into the FIFO of
Endpoint 0 at the current location of the transmit write point-
er. The register allows write-only access from the CPU bus.
TXFD
18.3.28 Receive Status 0 Register (RXS0)
The RXS0 register indicates status conditions for the bidi-
rectional Control Endpoint 0. To receive a SETUP packet af-
ter receiving a zero length OUT/SETUP packet, there are
two copies of this register in hardware. One holds the re-
ceive status of a zero length packet, and another holds the
status of the next SETUP packet with data. If a zero length
packet is followed by a SETUP packet, the first read of this
register indicates the status of the zero length packet (with
RX_LAST set and RCOUNT clear), and the second read in-
dicates the status of the SETUP packet. This register pro-
vides read-only access from the CPU bus. After reset it is
clear.
RCOUNT
RX_LAST
Res. SETUP TOGGLE RX_LAST
7
7
6
Writing a 1 to the Flush FIFO bit flushes all
data from the control endpoint FIFOs, resets
the endpoint to Idle state, clears the FIFO
read and write pointer, and then clears itself.
If the endpoint is currently using the FIFO0 to
transfer data on USB, flushing is delayed until
after the transfer is complete. The FLUSH bit
is cleared on reset. It is equivalent to the
FLUSH bit in the RXC0 register.
0 – Writing 0 has no effect.
1 – Writing 1 flushed the FIFOs.
When the Ignore IN Tokens bit is set, the end-
point will ignore any IN tokens directed to its
configured address.
0 – Do not ignore IN tokens.
1 – Ignore IN tokens.
The Transmit FIFO Data Byte is used to load
the transmit FIFO. Software is expected to
write only the packet payload data. The PID
and CRC16 are created automatically.
The Receive Count field reports the number of
bytes presently in the RX FIFO. This number
is never larger than 8 for Endpoint 0.
The Receive Last Bytes bit indicates that an
ACK was sent on completion of a successful
receive operation. This bit is unchanged for
zero-length packets. It is cleared when this
register is read.
0 – No ACK was sent.
1 – An ACK was sent.
5
TXFD
4
3
RCOUNT
0
0
106
TOGGLE
SETUP
18.3.29 Receive Command 0 Register (RXC0)
The RXC0 register controls the mandatory Endpoint 0 when
used in receive direction. This register provides read/write
access from the CPU bus. It is clear after reset.
RX_EN
IGN_OUT
IGN_SETUP The Ignore SETUP Tokens bit controls wheth-
7
Reserved
4
The Toggle bit reports the PID used when re-
ceiving the packet. When clear, this bit indi-
cates that the last successfully received
packet had a DATA0 PID. When set, this bit in-
dicates that the packet had a DATA1 PID. This
bit is unchanged for zero-length packets. It is
cleared when this register is read.
0 – DATA0 PID was used.
1 – DATA1 PID was used.
The Setup bit indicates that the setup packet
has been received. This bit is unchanged for
zero-length packets. It is cleared when this
register is read.
0 – Setup packet has not been received.
1 – Setup packet has been received.
The Receive Enable bit enables receiving
packets. OUT packet reception is disabled af-
ter every data packet is received, or when a
STALL handshake is returned in response to
an OUT token. The RX_EN bit must be set to
re-enable data reception. Reception of SET-
UP packets is always enabled. In the case of
back-to-back SETUP packets (for a given
endpoint) where a valid SETUP packet is re-
ceived with no other intervening non-SETUP
tokens, the Endpoint Controller discards the
new SETUP packet and returns an ACK hand-
shake. If any other reasons prevent the End-
point Controller from accepting the SETUP
packet, it must not generate a handshake.
This allows recovery from a condition where
the ACK of the first SETUP token was lost by
the host.
0 – Receive disabled.
1 – Receive enabled.
The Ignore OUT Tokens bit controls whether
OUT tokens are ignored. When this bit is set,
the endpoint ignores any OUT tokens directed
to its configured address.
0 – Do not ignore OUT tokens.
1 – Ignore OUT tokens.
er SETUP tokens are ignored. When this bit is
set, the endpoint ignores any SETUP tokens
directed to its configured address.
0 – Do not ignore SETUP tokens.
1 – Ignore SETUP tokens.
FLUSH IGN_SETUP IGN_OUT RX_EN
3
2
1
0
Related parts for cp3bt26y98nepx
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
Freescale Semiconductor Technical Data
Manufacturer:
National Semiconductor Corporation
Datasheet:
Part Number:
Description:
Self-calibrating 12-bit Plus Sign Serial I/o A/d Converters With Mux And Sample/hold
Manufacturer:
National Semiconductor Corporation
Datasheet:
Part Number:
Description:
Pllatinum Tm Fractional N Rf / Integer N If Dual Low Power Frequency Synthesizer
Manufacturer:
National Semiconductor Corporation
Datasheet:
Part Number:
Description:
Pllatinum? 2.0 Ghz Frequency Synthesizer For Rf Personal Communications
Manufacturer:
National Semiconductor Corporation
Datasheet:
Part Number:
Description:
Pllatinumtm 160 Mhz Frequency Synthesizer For Rf Personal Communications
Manufacturer:
National Semiconductor Corporation
Datasheet:
Part Number:
Description:
Dual N-channel Enhancement Mode Field Effect Transistor
Manufacturer:
National Semiconductor Corporation
Datasheet:
Part Number:
Description:
Video Amplifier System (obsolete)
Manufacturer:
National Semiconductor Corporation
Datasheet:
Part Number:
Description:
Synchronous Step-up DC/DC Converter For White Led Applications
Manufacturer:
National Semiconductor Corporation
Datasheet:
Part Number:
Description:
CLC420 - High Speed, Voltage Feedback op Amp, Package: Lcc, Pin Nb=20
Manufacturer:
National Semiconductor Corporation
Datasheet:
Part Number:
Description:
Monolithic Triple 4.5 CRT Driver
Manufacturer:
National Semiconductor Corporation
Datasheet:
Part Number:
Description:
Differential Video Amplifier
Manufacturer:
National Semiconductor Corporation
Datasheet:
Part Number:
Description:
ADC10061 - 10-Bit 600 NS A/D Converter With Input Multiplexer And Sample/Hold, Package: Soic Wide, Pin Nb=20
Manufacturer:
National Semiconductor Corporation
Datasheet:
Part Number:
Description:
DS36277 - Dominant Mode Multipoint Transceiver, Package: Soic Narrow, Pin Nb=8
Manufacturer:
National Semiconductor Corporation
Datasheet:
Part Number:
Description:
Printer Solenoid Driver
Manufacturer:
National Semiconductor Corporation
Datasheet:
Part Number:
Description:
Quad High Speed Trapezoidal Bus Transceiver
Manufacturer:
National Semiconductor Corporation
Datasheet: