N55P242 Datasheet PDF - nuvoton

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N55P242
nuvoton

Part Number N55P242
Description 8 - 24 I/O EXPANDER
Page 18 Pages


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N55Pxxx Data Sheet
8 ~ 24 I/O EXPANDER WITH 256-lEVEL PWM OUTPUT
N55Pxxx
Data Sheet
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 Peripheral 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
Release Date: Mar. 2017
- 1 - Version A2.1



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N55Pxxx Data Sheet
Table of Contents
1. GENERAL DESCRIPTION...............................................................................................3
2. FEATURES........................................................................................................................3
3. PAD DESCRIPTION .........................................................................................................5
4. BLOCK DIAGRAM...........................................................................................................6
5. ELECTRICAL CHARACTERISTICS...............................................................................7
5.1 Absolute Maximum Ratings...............................................................................7
5.2 DC Characteristics..............................................................................................7
5.3 AC Characteristics..............................................................................................8
6. REFERENCE APPLICATION CIRCUIT .......................................................................10
7. PACKAGE INFORMATION ..........................................................................................12
8. ORDERING INFORMATION.........................................................................................17
9. REVISION HISTORY .....................................................................................................18
Release Date: Mar. 2017
- 2 - Version A2.1



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N55Pxxx Data Sheet
1. General Description
The N55Pxxx series is a general purpose programmable I/O device usable with different
microprocessors through SPI interface. The N55Pxxx contains up to three 8-bit ports
(BPA, BPB and BPC). There are 8~24 I/O pins which may be individually programmed
for 6 separate command groups. The N55Pxxx features logical operating capability
AND/OR/XOR for each bit of internal configuration register to speed up access. These
GPIO pads can drive LED directly with 256 levels of brightness.
The N55Pxxx series contains following bodies with different GPIO pins:
Part No.
N55P082
N55P162
N55P242
GPIO
8 pads
16 pads
24 pads
I/O port
BPB
BPA, BPB
BPA, BPB, BPC
2. Features
Wide range of operating voltage:
2.0 ~ 5.5V
SPI interface in mode 0
4 SPI pins for communication
CSB as chip select pin (low active)
SCK for data synchronization (up to 8MHz)
MOSI for N55Pxxx to receive commands and data
MISO for the microcontroller to receive data
1 wakeup pad for the microcontroller
8~24 I/O pads
Bi-directional I/O pads
o N55P082: 8 I/O pads
o N55P162: 16 I/O pads
o N55P242: 24 I/O pads
Status of each pad is independently controlled
o Input
Floating
Pull high
Pull low
Dynamic pull low
-3-
Release Date: Mar. 2017
Version A2.1



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N55Pxxx Data Sheet
Dynamic pull high
o Output
CMOS high/low
Inverted CMOS high/low
Inverted open-drain NMOS output
Open-drain PMOS output
Constant sink current output
Any pad can be selected for wakeup to work
Speed up (AND/OR/XOR) groups to minimize load of MCU
PWM I/O
256 levels output
Internal ring oscillator @ 8 MHz
4 clock sources
Reset management
Power-on reset
S/W reset
Standby current <1uA
Connection of up to 2 N55Pxxx devices
Release Date: Mar. 2017
- 4 - Version A2.1



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N55P242 8 - 24 I/O EXPANDER N55P242
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