LPC47M192-NW Standard Microsystems (SMSC), LPC47M192-NW Datasheet - Page 115

• Manufacturer Part Number: LPC47M192-NW
• Manufacturer: Standard Microsystems (SMSC)

Specifications of LPC47M192-NW

• Lead Free Status / RoHS Status: Compliant

Note 1: The GPIO Data and Configuration Registers are located in PME block at the offset shown from
PME_BLK address.
7.12.3 GPIO CONTROL
Each GPIO port has an 8-bit control register that controls the behavior of the pin. These registers are defined in the
“Runtime Registers” section of this specification.
Each GPIO port may be configured as either an input or an output. If the pin is configured as an output, it can be
programmed as open-drain or push-pull. Inputs and outputs can be configured as non-inverting or inverting. Bit[0] of
each GPIO Configuration Register determines the port direction, bit[1] determines the signal polarity, and bit[7]
detemines the output driver type select. The GPIO configuration register Output Type select bit[7] applies to GPIO
functions and the nSMI Alternate functions.
The Polarity Bit (bit 1) of the GPIO control registers control the GPIO pin when the pin is configured for the GPIO
function and when the pin is configured for the alternate function for all pins, with the exception of the DDRC function
on GP43, the analog game port pins (J1X, J1Y, J2X, J2Y) and the either edge triggered interrupts. When the
alternate function is selected for the analog joystick pins (GP14, GP15, GP16 and GP17), these pins become open
drain, non-inverted outputs.
The basic GPIO configuration options are summarized in Table 54.
SMSC DS – LPC47M192
PIN#
QFP
N/A
100
N/A
50
51
52
54
55
61
62
63
64
17
28
92
94
95
96
97
98
99
48
49
1
2
FUNCTION
Infrared Rx
Infrared Tx
DEFAULT
Reserved
Reserved
GPIO
GPIO
GPIO
GPIO
GPIO
GPIO
GPIO
GPIO
GPIO
GPIO
GPIO
GPIO
GPIO
GPIO
GPIO
GPIO
GPIO
GPIO
GPIO
GPIO
GPIO
SELECTED
FUNCTION
GPIO
Transmit Serial Data 2
Drive Density Select 0
Drive Density Select 1
Receive Serial Data 2
Data Carrier Detect 2
Date Terminal Ready
Device Disable Reg.
Fan Speed Control 2
Fan Speed Control 1
Power Management
Request to Send 2
Fan Tachometer 2
Fan Tachometer 1
Data Set Ready 2
Keyboard Reset
Ring Indicator 2
Clear to Send 2
ALT. FUNC. 1
SMI Output
Gate A20
Control
GPIO
GPIO
Event
LED
LED
DIRECTION
Table 54 - GPIO Configuration Summary
BIT
B0
0
0
1
1
DATASHEET
FUNC. 2
ALT.
EETI
EETI
EETI
POLARITY
BIT
Page 115
B1
0
1
0
1
FUNC. 3
ALT.
EETI
Pin is a non-inverted output.
Pin is an inverted output.
Pin is a non-inverted input.
Pin is an inverted input.
REGISTER
DESCRIPTION
DATA
GP3
GP4
GP5
GP6
1
REGISTER
BIT NO.
DATA
7:4
7:2
7
0
1
5
0
6
2
3
4
6
7
0
1
2
3
1
2
3
4
5
7
0
1
REGISTER
OFFSET
Rev. 03/30/05
(HEX)
the
4D
4E
4F
50