U_Ep3Cr (Usb Ep3 Control Register) - NEC uPD98502 User Manual

6.2.11 U_EP3CR (USB EP3 Control Register)

This register is used for setting the operation of EndPoint3.
If the value in the MAXP field is rewritten during transmitting operation, the operation of USB Controller may
become unpredictable. Therefore, the MAXP can be written only when initial setting is being performed.
Bits Field
31 EP3EN
30:20 Reserved
19 TM3
18 SS3
17 Reserved
16 NAK3
15:7 Reserved
6:0 MAXP3
322
CHAPTER 6 USB CONTROLLER
R/W Default
R/W 0 EndPoint Enable:
When the V
data.
R/W 0 Reserved for future use. Writes '0's.
R/W 0 Tx Mode:
Bit for setting the transmit mode.
When this bit is set to a '0', transmitting is performed in SZLP Mode.
When this bit is set to a '1', transmitting is performed in NZLP Mode.
For a detailed explanation of the transmit modes, see Section 6.5.3.
R/W 0 Transmit Stall:
When the V
EndPoint3.
R/W 0 Reserved for future use. Writes '0's.
R/W 0 When the V
EndPoint3.
R/W 0 Reserved for future use. Writes '0's.
R/W 0 MAX Packet size:
The Max Packet Size for EndPoint3. Prior to the start of a USB transaction,
the V 4120A must write an appropriate value into this register.
R
Preliminary User's Manual S15543EJ1V0UM
Description
4120A sets this bit to a '1', EndPoint3 is enabled for transmit
R
4120A sets this bit to a '1', a STALL packet is sent from
R
4120A sets this bit to a '1', a NAK packet is sent from
R