mc68hc908bd48 Freescale Semiconductor, Inc, mc68hc908bd48 Datasheet - Page 172

• Manufacturer Part Number: mc68hc908bd48
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

Universal Serial Bus Module (USB)
13.5.5 USB Control Register 1 (UCR1)
Data Sheet
172
Address:
RX0E — Endpoint 0 Receive Enable
TP0SIZ[3:0] — Endpoint 0 Transmit Data Size
T1SEQ — Endpoint 1/2 Data Packet PID Select
ENDADD — Endpoint Address Select
Reset:
Read:
Write:
This bit is set to enable data packet reception from endpoint 0.
Software should set this bit when it is ready for data packet reception.
It must be cleared when data cannot be received. If RX0E "0" or RBFF
is "1", a NAK handshake will be returned for the next OUT token.
Reset clears this bit.
The TP0SIZ[3:0] is used to store the number of transmit data bytes
from endpoint 0. The default size of transmit data is "0" after reset.
This bit will determine the transmit data packet PID of endpoint 1/2.
When it is "0", the DATA0 PID (b0011) will be sent. When it is "1", the
DATA1 PID (b1011) will be sent. Reset clears this bit.
This bit specifies the which endpoint (1 or 2) uses the eight data
registers, UD1R0–UD1R7, for data transmit buffers. Clearing this bit
selects endpoint 1 to use the data registers. Setting this bit selects
endpoint 2 to use the data registers.
1 = Data is read to be received on endpoint 0
0 = Not ready for data; respond with NAK
1 = DATA1 PID will be sent on endpoint 1/2
0 = DATA0 PID will be sent on endpoint 1/2
T1SEQ
$002F
Bit 7
Universal Serial Bus Module (USB)
0
Figure 13-5. USB Control Register 1 (UCR1)
ENDADD
6
0
TX1E
5
0
FRESUM TP1SIZ3
4
0
3
0
MC68HC908BD48
TP1SIZ2
Freescale Semiconductor
2
0
TP1SIZ1
1
0
—
TP1SIZ0
Rev. 2.1
Bit 0
0