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Número de pieza NUC502
Descripción 32-bit Microcontroller
Fabricantes nuvoton 
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NUC502
ARM® ARM7TDMI Based
32-bit Microprocessor
NUC502 Series
User Manual
The information described in this document is the exclusive intellectual property of
Nuvoton Technology Corporation and shall not be reproduced without permission from Nuvoton.
Nuvoton is providing this document only for reference purposes of NuMicro microcontroller based system
design. Nuvoton assumes no responsibility for errors or omissions.
All data and specifications are subject to change without notice.
For additional information or questions, please contact: Nuvoton Technology Corporation.
www.nuvoton.com
Apr 30, 2015
Page 1 of 266
Rev 1.1

1 page




NUC502 pdf
7.3.3
Voice Recorder Characteristic
8 Package Specifications
9 REVISION HISTORY
NUC502
261
262
265
Apr 30, 2015
Page 5 of 266
Rev 1.1

5 Page





NUC502 arduino
NUC502
Pin Descriptions
In order to maximize the NUC502 application for different field, each pin of NUC502 is
very flexible and can play up to four different functions. The user can program each pin to
the wanted function for the different product.
The pin functions are controlled by the registers PAD_REG0, PAG_REG1 and PAD_REG2.
For each multiple function pin, the default function is the GPIO. When the user programs
the PAD_REG, the pins play the alternative function. If the different alternative functions are
enabled simultaneous, the priority is
Alternative Function 1 > Alternative Function 2 > Alternative Function 3 > Default
Function
For example:
If the GPA[12] is configured to be SPIMS_SO by PAD_REG1 and it is also configured to
be PWMT0 by PAD_REG0, the actual function of GPA[12] would be SPIMS_SO because the
SPIMS_SO function priority is higher than PWMT0.
Except the multiple functions, each NUC502 output driving current strength is also
controllable. The driving strength control register is the GPA_DS, GPB_DS and GPC_DS. For
different pin the driving can be 4mA or 8mA and 12mA or 16mA. For example, user can
control the GPB[1] strength to 16mA and directed drive the high current LED to save PCB
extra component to reduce the BOM cost.
Default
Function
Name
GPIO
GPA[0]
GPA[1]
GPA[2]
GPA[3]
GPA[4]
GPA[5]
GPA[6]
GPA[7]
Alternative
Function 1
Alternative
Function 2
AI[0]
MIC+
AI[1]
MIC-
AI[2]
AI[3]
AI[4]
AI[5]
AI[6]
AI[7]
LVD
SPIM0_SS(Master)
Alternative
Function 3
Power on
setting
Apr 30, 2015
Page 11 of 266
Rev 1.1

11 Page







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