M66291GP/HP
1.2 Block Diagram
The M66291 contains an USB-IP block, an I/O block, a bus interface unit (BIU), and a FIFO memory.
I/O Block
(Oscillator)
•Xin
•Xout
Oscillation
Buffer
/48MHzPLL
USB-IP
CPU Interface Register
Bus
Interface
Unit
(BIU)
Interrupt Controller
(USB Power Supply)
•Vbus
(Pullup Resistance)
•TrON
Vbus
Input Circuit
D+ Pin Pullup
Circuit
Bus Interface Pins
•A1-6
•D0-7
•D8-15
•CS
•RD
•LWR
•HWR
Transfer
Controller
Endpoint
Controller
Interrupt Pins
•INT0
•INT1/SOF
(USB Data)
•D+
•D-
USB
Transceiver
Serial Interface
Engine
(SIE)
FIFO Memory Controller
DMA Control Pins
•Dreq0
•Dack0
•Dreq1
•Dack1
•TC1
Reset Pins
•RST
FIFO Memory
Test Pins
•TEST
Figure 1.2 M66291 Block Diagram
Rev1.01
2004.11.01
page 4 of 122
RENESAS [ RENESAS TECHNOLOGY CORP ]
