gl845 Genesys Logic, gl845 Datasheet - Page 19

• Manufacturer Part Number: gl845
• Description: High Speed Usb 2.0 2-in-1 Scanner Controller With Adf
• Manufacturer: Genesys Logic

©2000-2007 Genesys Logic Inc. - All rights reserved.
SPI_CS
SPI_SCK
SPI_DI
SPI_DO
IMG_RD/CPU_RD
EMPTY/CPU_WR
TWODAT[15:0]/CPU_A[15:0]
DBUS0~15
ABUS0~12
RASJ
CASJ
WEJ
BANK0-1
CKE
RAMCLK
X1
X2
EXTRST_
AVDD1, AVDD2, AVDD3
AGND1, AGND2, AGND3
DVCC1
DGND1, DGND2
VccCore1, VccCore2, VccCore3,
VccCore4
GndCore1, GndCore2, GndCore3, GndCore4
VccIO1, VccIO2, VccIO3, VccIO4, VccIO5,
VccIO6
GndIO1, GndIO2, GndIO3, GndIO4, GndIO5,
GndIO6
DP
DM
RREF
GL845 High Speed USB2.0 2-in-1 Scanner Controller With ADF
B
O
O
O
O
O
O
O
O
B
B
B
P
P
P
P
P
P
P
P
I
I
ASIC is as a slave and inputs SPI CS from external MCU.
ASIC is as a slave and inputs SPI SCK from external MCU.
ASIC is as a slave and outputs SPI DI to external MCU.
ASIC is as a slave and inputs SPI DO from external MCU.
Image read for two chips operation;
External 8051 CPU RD.
Buffer empty for two chips operation;
External 8051 CPU WR.
Data bus for two chips operation;
Address/data bus input for external 8051 CPU.
DRAM data bus
DRAM address bus
SDRAM row address strobe
SDRAM column address strobe
SDRAM write enable
SDRAM bank select
SDRAM clock enable
SDRAM clock
Clock input for crystal (12MHz)
Clock output for crystal
Hardware reset input
Analog power input for USB2.0 transceiver 3.3V
Analog ground input for USB2.0 transceiver
Digital power input for USB2.0 controller 1.8V
Digital ground input for USB2.0 controller.
Digital power input for scanner controller logic core 1.8V
Digital ground input for scanner controller logic core.
Digital power input for scanner controller I/O pads 3.3V
Digital ground input for scanner controller I/O pads.
Positive USB differential data
Negative USB Differential Data
715 Ohm 1% reference resistor input which should be tied to
analog ground
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