LPC47N227TQFP Standard Microsystems (SMSC), LPC47N227TQFP Datasheet - Page 88

• Manufacturer Part Number: LPC47N227TQFP
• Manufacturer: Standard Microsystems (SMSC)

Specifications of LPC47N227TQFP

• Lead Free Status / RoHS Status: Not Compliant

The LPC47N227 incorporates an IBM XT/AT compatible parallel port. This supports the optional PS/2
type bi-directional parallel port (SPP), the Enhanced Parallel Port (EPP) and the Extended Capabilities
Port (ECP) parallel port modes. Refer to the Configuration Registers for information on disabling, power
down, changing the base address of the parallel port, and selecting the mode of operation.
The LPC47N227 also provides a mode for support of the floppy disk controller on the parallel port.
The parallel port also incorporates SMSC's ChiProtect circuitry, which prevents possible damage to the
parallel port due to printer power-up.
The functionality of the Parallel Port is achieved through the use of eight addressable ports, with their
associated registers and control gating. The control and data port are read/write by the CPU, the status
port is read/write in the EPP mode. The address map of the Parallel Port is shown below
The bit map of these registers is:
Note 1: These registers are available in all modes.
Note 2: These registers are only available in EPP mode.
DATA PORT
STATUS
PORT
CONTROL
PORT
EPP ADDR
PORT
EPP DATA
PORT 0
EPP DATA
PORT 1
EPP DATA
PORT 2
EPP DATA
PORT 3
STROBE AUTOFD
TMOUT
PD0
PD0
PD0
PD0
PD0
PD0
D0
PD1
PD1
PD1
PD1
PD1
PD1
D1
DATA PORT
STATUS PORT
CONTROL PORT
EPP ADDR PORT
EPP DATA PORT 0
EPP DATA PORT 1
EPP DATA PORT 2
EPP DATA PORT 3
0
nINIT
PD2
PD2
PD2
PD2
PD2
PD2
D2
0
PARALLEL PORT
nERR
PD3
SLC
PD3
PD3
PD3
PD3
PD3
D3
88
BASE ADDRESS + 00H
BASE ADDRESS + 01H
BASE ADDRESS + 02H
BASE ADDRESS + 03H
BASE ADDRESS + 04H
BASE ADDRESS + 05H
BASE ADDRESS + 06H
BASE ADDRESS + 07H
SLCT
IRQE
PD4
PD4
PD4
PD4
PD4
PD4
D4
PCD
PD5
PD5
PD5
PD5
PD5
PD5
PE
D5
nACK
PD6
PD6
PD6
PD6
PD6
PD6
D6
0
nBUSY
PD7
PD7
PD7
PD7
PD7
PD7
D7
0
Note
1
1
2
2
2
2
2
1