m66291 Renesas Electronics Corporation., m66291 Datasheet - Page 94

• Manufacturer Part Number: m66291
• Description: Assp Usb2.0 Device Controller
• Manufacturer: Renesas Electronics Corporation.

M 6 6 2 9 1 G P / H P
R e v 1 . 0 1
2 0 0 4 . 1 1 . 0 1
SETUP : SETUP PID
OUT
IN
ADDR
EP
CRC5
DATA0 : DATA0 PID
DATA1 : DATA1 PID
SETUP
DATA0
ACK
IN
NAK
IN
NAK
OUT
DATA1
STALL
SETUP
DATA0
ACK
IN
NAK
: OUT PID
: IN PID
: USBaddress (H'00~H'7F)
: Endpoint (H'0~H'3)
: 5 bits CRC
ADDR
8 bytes data (CR)
ADDR
ADDR
ADDR
CRC16
ADDR
8 bytes data(CR)
ADDR
p a g e 9 4 o f 1 2 2
Figure 3.10 Examples of Control Transfer Error Operations
EP
EP
EP
EP
EP
EP
USB bus
CRC5
CRC5
CRC5
CRC5
CRC5
CRC5
CR
CW
ND
CRC16 : 16 bits CRC
ACK
NAK
STALL : STALL PID
CRC16
(0 byte length data)
CRC16
: Control read transfer
: Control write transfer
: Control no data transfer
: ACK PID
: NAK PID
W rite data to
EP0_FIFO
(IVAL='1')
EP0_PID =
"01"
VALID='1'
EP0_PID="00"
CCPL='0'
CTRT='1'
CTSQ ="001"
CTRT='0'
VALID='0'
CTRT='0'
VALID='1'
EP0_PID="00"
CCPL='0'
CTRT='1'
CTSQ ="001"
CTRT='1'
CTSQ ="110"
EP0_PID="10"
H/W state
: Data to device from host
: Data to host from device
Interrupt
Interrupt
Interrupt
Execute the following
processing on the basis of the
request data analysis result.
1. Set the transm it data to the
2. Set the EP0 response PID
EP0 FIFO
to BUF ("01")
CTRT interrupt confirm
CTRT interrupt confirm
CTRT interrupt confirm
Request data analysis
Request data analysis
CTRT interrupt clear
CTRT interrupt clear
CTRT interrupt clear
VALID confirm
VALID clear
VALID clear
VALID='0'
S/W procedure
VALID='1'
W ait for the next CTRT
Abandon request data
analysis result
interrupt