CP2400DK Silicon Laboratories Inc, CP2400DK Datasheet - Page 63

• Manufacturer Part Number: CP2400DK
• Description: KIT EVAL SPI LCD DRIVER CP2400
• Manufacturer: Silicon Laboratories Inc

Specifications of CP2400DK

• Main Purpose: LCD Development
• Embedded: Yes
• Utilized Ic / Part: CP2400
• Primary Attributes: I²C, SMBus Interfaces
• Secondary Attributes: Up to 128 segments
• Product: Microcontroller Modules
• Core Processor: C8051F930
• Clock Speed: 20 MHz
• Interface Type: SPI
• Timers: 2
• Operating Supply Voltage: 1.8 V to 3.6 V
• Cpu Core: C8051F930
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Contains lead / RoHS non-compliant
• Other names: 336-1858; 336-1858

10.3. Active Mode Port Match
Port match functionality allows system events to be triggered by a logic value change on a GPIO pin. A software
controlled value stored in the PnMATCH registers specifies the expected or normal logic values of the associated
Port. A Port mismatch event occurs if the logic levels of the Port’s input pins no longer match the software
controlled value. This allows software to be notified if a certain change or pattern occurs on an input pin.
The PnMSK registers can be used to individually select which pins should be compared against the PnMATCH
registers. A Port mismatch event is generated if (PnIN & PnMSK) does not equal (PnMATCH & PnMSK) for all
Ports.
A Port mismatch event may be used to generate an interrupt. See “7. Interrupt Sources” on page 40 for more
details on handling an interrupt.
SFR Definition 10.1. PMATCHST: Port Match Status Register
Address = 0xD0
Name
Reset
Type
7:5
Bit
Bit
4
3
2
1
0
Unused
R/W
Name
P4M
P3M
P2M
P1M
P0M
7
0
Read = 000b. Write = Don’t Care.
Port 4 Match.
0: No port mismatch events have been detected on P4.
1: A port mismatch event is present on P4.
Port 3 Match.
0: No port mismatch events have been detected on P3.
1: A port mismatch event is present on P3.
Port 2 Match.
0: No port mismatch events have been detected on P2.
1: A port mismatch event is present on P2.
Port 1 Match.
0: No port mismatch events have been detected on P1.
1: A port mismatch event is present on P1.
Port 0 Match.
0: No port mismatch events have been detected on P0.
1: A port mismatch event is present on P0.
R/W
6
0
R/W
5
0
Rev. 1.0
P4M
R/W
4
0
Function
P3M
R/W
3
0
P2M
R/W
2
0
CP2400/1/2/3
P1M
R/W
1
0
P0M
R/W
0
0
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