FDC37B787-NS Standard Microsystems (SMSC), FDC37B787-NS Datasheet - Page 99

• Manufacturer Part Number: FDC37B787-NS
• Manufacturer: Standard Microsystems (SMSC)

Specifications of FDC37B787-NS

• Pin Count: 128
• Lead Free Status / RoHS Status: Compliant

Register Definitions
The register definitions are based on the standard
IBM addresses for LPT. All of the standard printer
ports are supported.
attach to an upper bit decode of the standard LPT
port definition to avoid conflict with standard ISA
Note 1: These addresses are added to the parallel port base address as selected by configuration register
Note 2: All addresses are qualified with AEN. Refer to the AEN pin definition.
data
ecpAFifo
dsr
dcr
cFifo
ecpDFifo
tFifo
cnfgA
cnfgB
ecr
NAME
or jumpers.
*Refer to ECR Register Description
MODE
000
001
010
011
100
101
110
111
SPP mode
PS/2 Parallel Port mode
Parallel Port Data FIFO mode
ECP Parallel Port mode
EPP mode (If this option is enabled in the configuration registers)
Reserved
Test mode
Configuration mode
ADDRESS (Note 1)
The additional registers
+000h R/W
+000h R/W
+001h R/W
+002h R/W
+400h R/W
+400h R/W
+400h R/W
+401h R/W
+402h R/W
+400h R
TABLE 42 - ECP REGISTER DEFINITIONS
TABLE 43 - MODE DESCRIPTIONS
DESCRIPTION*
99
ECP MODES
devices. The port is equivalent to a generic parallel
port interface and may be operated in that mode.
The port registers vary depending on the mode
field in the ecr. The table below lists these
dependencies. Operation of the devices in modes
other that those specified is undefined.
000-001
011
010
011
110
111
111
All
All
All
Data Register
ECP FIFO (Address)
Status Register
Control Register
Parallel Port Data FIFO
ECP FIFO (DATA)
Test FIFO
Configuration Register A
Configuration Register B
Extended Control Register
FUNCTION