m5m51016btp Renesas Electronics Corporation., m5m51016btp Datasheet - Page 143

• Manufacturer Part Number: m5m51016btp
• Description: Renesas 16-bit Single-chip Microcomputer M16c Family / M16c/20 Series
• Manufacturer: Renesas Electronics Corporation.

M30245 Group
Rev.2.00 Oct 16, 2006
REJ09B0340-0200
Figure 2.8.6. Isochronous transfer
(5) Interrupt Transfer
(4) Isochronous Transfer
This transfer form is same as the bulk transfer. Refer to “(3) Bulk Transfer” of this manual.
In isochronous IN transfer which data are transferred from the device to the host CPU, isochronous
(IN) transactions are repeated. Isochronous transaction does not have the handshake phase. The
data packet consists only of DATA0. Toggling with DATA1 is not performed. When transmit data is
available in IN FIFO, the M30245 group issues a data packet to the IN token. The M30245 group
executes the following responses when the data are not transmitted normally:
In isochronous OUT transfer which data are transferred from the host CPU to the device, isochro-
nous (OUT) transactions are repeated. Isochronous transaction does not have the handshake
phase. The data packet consists only of DATA0. Toggling with DATA1 is not performed.
The M30245 group has received a data packet, indicates whether or not the data content is normal
by using a status flag. The M30245 group executes the following responses when the data are not
received normally:
•When the packet, which is exceeding receivable data size, is transmitted, the data are not received.
•When the received IN token is destroyed, the data are not issued.
•When the transmit data are not available in IN FIFO, an empty packet of data length (0) is issued.
•When the received OUT token is destroyed, the data are not received.
•When the received data are destroyed (bit stuffing error or CRC error occur), the data are received.
•When OUT FIFO of the M30245 group could not receive the full data, the data are not received.
Isochronous IN Transfer
Isochronous OUT Transfer
Isochronous IN
(Idle state)
(Idle state)
page 134 of 354
DATA0
IN
: Host issues
: Device issues
Isochronous OUT
(Idle state)
(Idle state)
DATA0
OUT
2. USB function