Datasheet

ADuC7124/ADuC7126 Data Sheet
Rev. C | Page 22 of 108
Pin No. Mnemonic Description
62 P1.1/SPM1/SOUT0/I2C0SDA/PLAI[1]
General-Purpose Input and Output Port 1.1 (P1.1).
Serial Port Multiplexed (SPM1).
UART0 Output (SOUT0).
I2C0 (I2C0SDA).
Programmable Logic Array Input Element 1 (PLAI[1]).
63 P1.0/T1/SPM0/SIN0/I2C0SCL/PLAI[0]
General-Purpose Input and Output Port 1.0 (P1.0).
Timer1 Input (T1).
Serial Port Multiplexed (SPM0).
UART0 Input (SIN0).
I2C0 (I2C0SCL).
Programmable Logic Array Input Element 0 (PLAI[0]).
64 P4.2/AD10/PLAO[10]
General-Purpose Input and Output Port 4.2 (P4.2).
External Memory Interface (AD10).
Programmable Logic Array Output Element 10 (PLAO[10]).
65 P4.3/AD11/PLAO[11]
General-Purpose Input and Output Port 4.3 (P4.3).
External Memory Interface (AD11).
Programmable Logic Array Output Element 11 (PLAO[11]).
66 P4.4/AD12/PLAO[12]
General-Purpose Input and Output Port 4.4 (P4.4).
External Memory Interface (AD12).
Programmable Logic Array Output Element 12 (PLAO[12]).
67 P4.5/AD13/PLAO[13]/RTCK
General-Purpose Input and Output Port 4.5 (P4.5).
External Memory Interface (AD13).
Programmable Logic Array Output Element 13 (PLAO[13]).
JTAG Return Test Clock (RTCK).
68 IOV
DD
3.3 V Supply for GPIO and Input of the On-Chip Voltage Regulator.
69 IOGND Ground for GPIO. Typically connected to DGND.
70 V
REF
2.5 V Internal Voltage Reference. Must be connected to a 0.47 µF capacitor when using
the internal reference.
71 DAC
REF
External Voltage Reference for the DACs. Range: DACGND to DACV
DD
.
72 AV
DD
3.3 V Analog Power.
73, 74 AGND Analog Ground. Ground reference point for the analog circuitry.
75 GND
REF
Ground Voltage Reference for the ADC. For optimal performance, the analog power
supply should be separated from IOGND and DGND.
76 ADC11 Single-Ended or Differential Analog Input 11.
77 ADC0 Single-Ended or Differential Analog Input 0.
78 ADC1 Single-Ended or Differential Analog Input 1.
79 ADC2/CMP0
Single-Ended or Differential Analog Input 2 (ADC2).
Comparator Positive Input (CMP0).
80 ADC3/CMP1
Single-Ended or Differential Analog Input 3 (ADC3).
Comparator Negative Input (CMP1).