HD6417641 RENESAS [Renesas Technology Corp], HD6417641 Datasheet - Page 833

• Manufacturer Part Number: HD6417641
• Manufacturer: RENESAS [Renesas Technology Corp]

(1) Transition from normal operation to stall
(2) When transaction is performed when internal status bit is set, and Clear Feature is sent
(3) When Clear Feature is sent before transaction is performed
(1-1)
(2-1)
(2-2)
(3-1)
STALL handshake
Transaction request
STALL handshake
Clear Feature command
Figure 20.14 Automatic Stall by USB Function Module
Internal status bit
Internal status bit
Internal status bit
Internal status bit
0 → 1
1 → 0
1
1
Stall status maintained
Normal status restored
To (2-1) or (3-1)
USBEPSTL
USBEPSTL
USBEPSTL
USBEPSTL
0
0
0
0
Rev. 4.00 Sep. 14, 2005 Page 783 of 982
Section 20 USB Function Module
1. In case of USB
1. USBEPSTL cleared
2. IN/OUT token
3. Internal status bit
4. USBEPSTL not
5. Internal status bit
1. Transmission of
1. Internal status bit
2. USBEPSTL not
specification
violation, etc., USB
function module
stalls endpoint
automatically
to 0 by application
received from host
already set to 1
referenced
not changed
STALL handshake
cleared to 0
changed
REJ09B0023-0400