m66291 Renesas Electronics Corporation., m66291 Datasheet - Page 93

• 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
IN
NAK
IN
NAK
IN
NAK
IN
DATA1
ACK
: OUT PID
: IN PID
: USB address (H'00~H'7F)
: Endpoint (H'0~H'3)
: 5 bits CRC
ADDR
8 bytes data (ND)
ADDR
ADDR
ADDR
ADDR
ADDR
ADDR
CRC16
p a g e 9 3 o f 1 2 2
Figure 3.9 Examples of No Data Control Transition Operations
EP
EP
EP
EP
EP
EP
EP
USB bus
CRC5
CRC5
CRC5
CRC5
CRC5
CRC5
CRC5
CR
CW
ND
CRC16 : 16 bits CRC
ACK
NAK
STALL : STALL PID
CRC16
(0 byte length data)
: Control read transfer
: Control write transfer
: Control no data transfer
: ACK PID
: NAK PID
CTRT='0'
VALID='0'
EP0_PID = "01"
CCPL='1'
CTRT='0'
VALID='1'
EP0_PID="00"
CCPL='0'
CTRT='1'
CTSQ ="101"
CTRT='1'
CTSQ ="000"
H/W state
: Data to device from host
: Data to host from device
Interrupt
Interrupt
Execute the following
processing on the basis of the
request data analysis result.
1. Set the EP0 response PID
2. Set the CCPL
to BUF ("01")
CTRT interrupt confirm
CTRT interrupt confirm
Request data analysis
CTRT interrupt clear
CTRT interrupt clear
confirm ed to have
VALID confirm
analysis result
Request data
VALID clear
no-problem
VALID='0'
No-problem
S/W procedure
VALID='1'
problem
W ait for the next CTRT
Abandon request data
PID to STALL("1x")
Set EP0 response
analysis result
interrupt