XC68HC705JB3 Motorola, XC68HC705JB3 Datasheet - Page 91

• Manufacturer Part Number: XC68HC705JB3
• Description: MICROCONTROLLER
• Manufacturer: Motorola

10.5.5 USB Control Register 1 (UCR1)
MC68HC05JB3
REV 1
RX0E — Endpoint 0 Receive Enable
TP0SIZ3-TP0SIZ0 — Endpoint 0 Transmit Data Packet Size
T1SEQ — Endpoint1/Endpoint 2 Transmit Sequence Bit
ENDADD — Endpoint Address Select
UCR1
$003C
This read/write bit enables a receive to occur when the USB Host controller
sends an OUT token to Endpoint 0. Software should set this bit when data is
ready to be received. It must be cleared by software when data cannot be
received.
If this bit is 0 or the RXD0F is set, the USB will respond with a NAK handshake
to any Endpoint 0 OUT tokens. Reset clears this bit.
These read/write bits store the number of transmit data bytes for the next IN
token request for Endpoint 0. These bits are cleared by reset.
This read/write bit determines which type of data packet (DATA0 or DATA1) will
be sent during the next IN transaction directed to Endpoint 1 or Endpoint 2.
Toggling of this bit must be controlled by software. Reset clears this bit.
This read/write bit specifies whether the data inside the registers
UE1D0-UE1D7 are used for Endpoint 1 or Endpoint 2. If all the conditions for a
successful Endpoint 2 USB response to a hosts IN token are satisfied
(TXD1F=0, TX1E=1, STALL2=0, and ENABLE2=1) except that the ENDADD bit
is configured for Endpoint 1, the USB responds with a NAK handshake packet.
reset:
1 = Data is ready to be received.
0 = Not ready for data. Respond with NAK.
1 = DATA1 Token active for next Endpoint 1/Endpoint 2 transmit.
0 = DATA0 Token active for next Endpoint 1/Endpoint 2 transmit.
1 = The data buffers are used for Endpoint 2.
0 = The data buffers are used for Endpoint 1.
W
R
T1SEQ ENDADD
BIT 7
0
Figure 10-24. USB Control Register 1 (UCR1)
UNIVERSAL SERIAL BUS MODULE
BIT 6
0
November 5, 1998
TX1E
BIT 5
0
FRESUM TP1SZ3 TP1SIZ2 TP1SIZ1 TP1SIZ0
BIT 4
0
GENERAL RELEASE SPECIFICATION
BIT 3
0
BIT 2
0
BIT 1
0
MOTOROLA
BIT 0
0
10-23