UPSD3233 STMicroelectronics, UPSD3233 Datasheet - Page 92

• Manufacturer Part Number: UPSD3233
• Description: Flash Programmable System Devices with 8032 Microcontroller Core
• Manufacturer: STMicroelectronics

UPSD3234A, UPSD3234BV, UPSD3233B, UPSD3233BV
Table 69. USB Endpoint0 Transmit Control Register (UCON0: 0EAh)
Table 70. Description of the UCON0 Bits
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TSEQ0
3 to 0
Bit
7
7
6
5
4
TP0SIZ3 to
TP0SIZ0
STALL0
Symbol
STALL0
TSEQ0
RX0E
TX0E
6
TX0E
R/W
R/W
R/W
R/W
R/W
R/W
5
Endpoint0 Data Sequence Bit. (0=DATA0, 1=DATA1)
This bit determines which type of data packet (DATA0 or DATA1) will be
sent during the next IN transaction. Toggling of this bit must be controlled
by software. RESET clears this bit
Endpoint0 Force Stall Bit.
This bit causes Endpoint 0 to return a STALL handshake when polled by
either an IN or OUT token by the USB Host Controller. The USB
hardware clears this bit when a SETUP token is received. RESET clears
this bit.
Endpoint0 Transmit Enable.
This bit enables a transmit to occur when the USB Host Controller sends
an IN token to Endpoint 0. Software should set this bit when data is ready
to be transmitted. It must be cleared by software when no more Endpoint
0 data needs to be transmitted. If this bit is '0' or the TXD0F is set, the
USB will respond with a NAK handshake to any Endpoint 0 IN tokens.
RESET clears this bit.
Endpoint0 receive enable.
This 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.
The number of transmit data bytes. These bits are cleared by RESET.
RX0E
4
TP0SIZ3
3
Function
TP0SIZ2
2
TP0SIZ1
1
TP0SIZ0
0