LPC47M112_07 SMSC [SMSC Corporation], LPC47M112_07 Datasheet - Page 116

• Manufacturer Part Number: LPC47M112_07
• Description: Enhanced Super I/O Controller with LPC Interface
• Manufacturer: SMSC [SMSC Corporation]

Enhanced Super I/O Controller with LPC Interface
Datasheet
Note 1: The GPIO Data and Configuration Registers are located in PME block at the offset shown from the
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]
determines 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 – LPC47M112
/QFP
N/A
100
N/A
PIN
NO.
17
28
92
94
95
96
97
98
99
48
49
1
2
PME_BLK address.
GPIO
GPIO
GPIO
GPIO
Reserved
GPIO
GPIO
GPIO
GPIO
GPIO
GPIO
GPIO
GPIO
GPIO
GPIO
Reserved
FUNCTION
DEFAULT
Drive
Density
Select 0
Drive
Density
Select 1
Power
Management
Event
Device
Disable Reg.
Control
Ring
Indicator 2
Data Carrier
Detect 2
Receive
Serial Data 2
Transmit
Serial Data 2
Data Set
Ready 2
Request to
Send 2
Clear to
Send 2
Date
Terminal
Ready
LED
LED
FUNC. 1
ALT.
FUNC. 2
DATASHEET
EETI
EETI
EETI
ALT.
Page 116
FUNC. 3
EETI
ALT.
REGISTER
DATA
GP5
GP6
GP4
1
REGISTER BIT
DATA
NO.
7:4
7:2
0
1
2
3
0
1
2
3
4
5
6
7
0
1
REGISTER
OFFSET
(HEX)
4E
4F
50
Rev. 02-16-07