mc68hc908jb8 Freescale Semiconductor, Inc, mc68hc908jb8 Datasheet - Page 153

• Manufacturer Part Number: mc68hc908jb8
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

9.8.11 USB Status Register 1
MC68HC908JB8•MC68HC08JB8•MC68HC08JT8 — Rev. 2.3
Freescale Semiconductor
Address:
R2SEQ — Endpoint 2 Receive Sequence Bit
TXACK — ACK Token Transmit Bit
TXNAK — NAK Token Transmit Bit
TXSTL — STALL Token Transmit Bit
RP2SIZ3–RP2SIZ0 — Endpoint 2 Receive Data Packet Size
Reset:
Read:
Write:
This read-only bit indicates the type of data packet last received for
endpoint 2 (DATA0 or DATA1).
This read-only bit indicates that an ACK token has been transmitted.
This bit is updated at the end of the EP0 data transmission.
This read-only bit indicates that a TXNAK token has been transmitted.
This bit is updated at the end of the EP0 data transmission.
This read-only bit indicates that a STALL token has been transmitted.
This bit is updated at the end of the EP0 data transmission.
These read-only bits store the number of data bytes received for the
last OUT transaction for endpoint 2.
1 = DATA1 token received in last endpoint 2 receive
0 = DATA0 token received in last endpoint 2 receive
1 = Last token transmitted for endpoint 0 was an ACK token
0 = Last token transmitted for endpoint 0 was not an ACK token
1 = Last token transmitted for endpoint 0 was a NAK token
0 = Last token transmitted for endpoint 0 was not a NAK token
1 = Last token transmitted for endpoint 0 was a STALL token
0 = Last token transmitted for endpoint 0 was not a STALL token
R2SEQ
$003E
Bit 7
Universal Serial Bus Module (USB)
U
Figure 9-25. USB Status Register 1 (USR1)
= Unimplemented
TXACK
6
0
TXNAK
5
0
TXSTL
4
0
RP2SIZ3 RP2SIZ2 RP2SIZ1 RP2SIZ0
Universal Serial Bus Module (USB)
U
3
U = Unaffected by reset
U
2
U
1
Technical Data
I/O Registers
Bit 0
U
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