HD6417660 RENESAS [Renesas Technology Corp], HD6417660 Datasheet - Page 641

• Manufacturer Part Number: HD6417660
• Description: Renesas 32-Bit RISC Microcomputer
• Manufacturer: RENESAS [Renesas Technology Corp]

(1) Transition from normal operation to stall
(2) When Clear Feature is sent after EPSTL is cleared
(3) When Clear Feature is sent before EPSTL is cleared to 0
(1-1)
(1-2)
(1-3)
(2-1)
(2-2)
(2-3)
(3-1)
Transaction request
STALL handshake
Transaction request
STALL handshake
Clear Feature command
Clear Feature command
USB
Figure 20.17 Forcible Stall by Application
Internal status bit
Internal status bit
Internal status bit
Internal status bit
Internal status bit
Internal status bit
Internal status bit
0 → 1
1 → 0
1 → 0
0
0
1
1
Normal status restored
To (2-1) or (3-1)
Reference
To (1-2)
Stall
EPSTL
EPSTL
EPSTL
EPSTL
EPSTL
EPSTL
EPSTL
0 → 1
1 → 0
1
1
0
0
1
Rev. 1.00, 02/04, page 603 of 804
1. 1 written to EPSTL
1. IN/OUT token
2. EPSTL referenced
1. 1 set in EPSTL
2. Internal status bit
3. Transmission of
1. EPSTL cleared to 0
2. IN/OUT token
3. Internal status bit
4. EPSTL not
5. Internal status bit
1. Transmission of
1. Internal status bit
1. Internal status bit
2. EPSTL not changed
by application
received from host
set to 1
STALL handshake
by application
received from host
already set to 1
referenced
not changed
STALL handshake
cleared to 0
cleared to 0