S1R72105 Technical Manual
2
EPSON
Rev.1.0
3. BLOCK DIAGRAM
Port interface section
Master mode control
Slave mode control
SCSI-3 interface section
XPDREQ
XPDACK
PD15-0
XPRD
XPWR
Sequence
control
Command
analysis and
execution
Asynchro-
nous transfer
control
Parity
GEN/CHK
FIFO
(16Byte)
DMA control
FIFO control
Synchronous
transfer
SCAM
control
XSRST
XSDP
XSREQ
XSATN
XSIO
XSCD
XSMSG
XSSEL
XSD7-0
XPUENB
XSACK
CPU interface section
Timing control
Interrupt control
Data MPX
DMA control section
Start-up/stop control
AD5-0
XCS
XRD
Phase
control
USB1.1 interface
FIFO (256Byte)
Serial
Interface
Engine
Transfer
control
ENDPOINTs
control
XUSBOE
V
BUS
DP
DM
Internal register
DB7-0
XWR
XRESET
TEST
Bus control
Clock control section
Clock
distribution
40/48 MHz
Generating PLL
EXCLK
V
C
OSCOUT
OSCIN
CLKSEL
X-NT
XSDP
XSBSY