7.7.7.1
When the Activate bit D0 is ‘0’, the MPU-401 I/O base address decoder is disabled, the IRQ is always deasserted,
and the MPU-401 hardware is in a minimum power-consumption state. When the Activate bit is ‘1’, the MPU-401 I/O
base address decoder and the IRQ are enabled, and the MPU-401 hardware is fully powered.
Register 0x60 is the MPU-401 I/O Base Address High Byte, register 0x61 is the MPU-401 I/O Base Address Low
Byte. The MPU-401 I/O base address is programmable on even-byte boundaries. The valid MPU-401 I/O base
address range is 0x0100 – 0x0FFE. See Section “Host Interface”.
7.8 PARALLEL PORT
SMSC DS – LPC47M192
Page 83
Rev. 03/30/05
DATASHEET
Activate and I/O Base address
The LPC47M192 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 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:
DATA PORT
BASE ADDRESS + 00H
STATUS PORT
BASE ADDRESS + 01H
CONTROL PORT
BASE ADDRESS + 02H
EPP ADDR PORT
BASE ADDRESS + 03H
The bit map of these registers is:
D0
D1
D2
D3
DATA PORT
PD0
PD1
PD2
PD3
STATUS
PORT
CONTROL
PORT
EPP ADDR
PORT
EPP DATA
PORT 0
EPP DATA
PORT 1
EPP DATA
PORT 2
EPP DATA
PORT 3
Note 1
: These registers are available in all modes.
Note 2
: These registers are only available in EPP mode.
EPP DATA PORT 0 BASE ADDRESS + 04H
EPP DATA PORT 1 BASE ADDRESS + 05H
EPP DATA PORT 2 BASE ADDRESS + 06H
EPP DATA PORT 3 BASE ADDRESS + 07H
D4
PD4
SLCT
D5
PD5
PE
D6
PD6
nACK
D7
PD7
nBUSY
Note
1
1
TMOUT
0
0
nERR
STROBE AUTOFD
nINIT
SLC
IRQE
PCD
0
0
1
PD0
PD1
PD2
PD3
PD4
PD5
PD6
PD7
2
PD0
PD1
PD2
PD3
PD4
PD5
PD6
PD7
2
PD0
PD1
PD2
PD3
PD4
PD5
PD6
PD7
2
PD0
PD1
PD2
PD3
PD4
PD5
PD6
PD7
2
PD0
PD1
PD2
PD3
PD4
PD5
PD6
PD7
2
Table 39 - Parallel Port Connector
HOST
CONNECTOR
1
PIN NUMBER
83
STANDARD
nSTROBE
EPP
ECP
nWrite
nStrobe
2-9
68-75
PD<0:7>
PData<0:7>
PData<0:7>
10
80
nACK
Intr
nAck
11
79
BUSY
nWait
Busy, PeriphAck(3)