LPC47N237-MD SMSC [SMSC Corporation], LPC47N237-MD Datasheet - Page 86

• Manufacturer Part Number: LPC47N237-MD
• Description: 3.3V I/O CONTROLLER FOR PORT REPLICATORS AND DOCKING STATIONS
• Manufacturer: SMSC [SMSC Corporation]

State
S0
S1
S2
S3
S4
S5
S6
S7
S8
S9
Revision 0.3 (10-26-04)
GPIO
Direction
0 = IN
1 = OUT
0
0
0
0
0
0
0
0
0
1
See Table 15.5 for a summary of GPIO Event States.
GPIO Pin
GPIO Data
Bit
Change Status
Bit
nSMBINT Pin
GPIO Pin
GPIO Data
Bit
Change Status
Bit
nSMBINT Pin
Case 2. GPIO Pin Transitions More Than Once Between Reads of Data Register
Read of Data Register
Read of Data Register
GPx
Pin
0
0 1
1
1 0
0 1
1
1
1 0
0
X
Case 1. GPIO Pin Transitions Once Between Reads of Data Register
Table 15.5 – SMBus GPIO Events State Table in LPC47N237
GPIO
Data
Register,
GPx Bit
0
0 1
1
1 0
0 1
1
1
1 0
0
X
Figure 15.2 - GPIO Transition Cases
DATASHEET
GPIO Mask
Register
0 = UnMask
1 = Mask
0
0
0
0
0
0
0 1
1
1 0
X
Page 86
GPIO Change
Status
Register
0 = No Change
1 = Change
0
0 1
1 0
0 1
1
1 0
0
0
0
0
Read of Data Register
Read of Data Register
3.3v I/O Controller for Port Replicators and Docking Stations
nSMBINT Pin
1
1 0
0 1
1 0
0
0 1
1
1
1
1
SMSC DS – LPC47N237
Read of GPIO
Data Register
No
No
Read
No
No
Read
No
No
No
No