R8A66597BG RENESAS [Renesas Technology Corp], R8A66597BG Datasheet - Page 122

• Manufacturer Part Number: R8A66597BG
• Description: ASSP (USB2.0 2 Port Host/1 Port Peripheral Controller)
• Manufacturer: RENESAS [Renesas Technology Corp]

R8A66597FP/DFP/BG
3.2.5
R e v 1 . 0 1
(2) Data Receive Example
(1) Data Send Example
*1) Handshake is not existing in iso chrono us transfers.
USB Bus
USB Bus
Buffer memory status
BEMP Interrupt
(Change in
corresponding
PIPEBEMP bit)
BEMP Interrupt
(Change in
corresponding
PIPEBEMP bit)
Packet sent by Host
Packet sent by Peripheral
BEMP Interrupt
The BEMP interrupt is generated when either the Host or Peripheral function has been selected. The conditions under
which the BEMP interrupt is requested are shown in 2.11.23.
Figure 3.9 provides the BEMP interrupt generation timing diagram.
Figure 3.9 BEMP Interrupt Generation Timing Diagram for Peripheral Controller Function
O c t 1 7 , 2 0 0 8
Send-enabled status
OUT Token Packet
p a g e 1 2 2 o f 1 8 3
IN Token Packet
Data Packet (Maximum
packet size over)
Data Packet
ACK Handshake
STALL Handshake
(*1
(*1
Write-enabled status
(no send-enabled data)