Freescale Semiconductor M9328MX21ADSE 3.4.2 UART4 Connector

Support Information

M9328MX21ADSE User’s Manual, Rev. A

Freescale Semiconductor 3-19

3.4.2 UART4 Connector

Connector P2 connects to the UART4 pins of the i.MX21 MCU. UART4 is the secondary functionality of

these pins. This male DB9 connector is configured for RS-232 DTE operation. Figure 3-6 shows pin

assignments and Table3-6 provides signal descriptions for the connector.

Figure 3-6. Connector P2 (UART4) DTE Pin Assignments

Table3-6. Connector P2 (UART4) DTE Signal Descriptions

Pin Signal Description

1 CD CARRIER DETECT — RS-232 input signal, can be jumpered to SD2_D2 at J5 or ignored

2RXD

RECEIVED DATA — RS-232 serial data input signal, connected to USBH1_TXDP when

UART4 is enable.

3TXD

TRANSMITTED DATA — RS-232 serial data output signal, connected to USBH1_TXDM

when UART4 is enabled

4DTR

DATA TERMINAL READY — RS-232 output signal, can be jumpered to SD2_D0 or forced

active positive at J3

5 GND GROUND

6DSR

DATA SET READY — RS-232 input signal, can be jumpered to SD2_D1 at J4 or ignored,

active positive

7RTS

READY TO SEND — RS-232 output signal, active positive, connected to USBH1_RXDM

when UART4 is enabled

8CTS

CLEAR TO SEND — RS-232 input signal, active positive, connected to USBH1_RXDP

when UART4 is enabled

9RI

RING INDICATOR — RS-232 input signal, active positive, can be jumpered to SD2_D3 at

J6 or ignored

5

TXD

DTR

DSR

RTS

CTS

RI

P2

4321

6789

RXD

CD

GND

Contents

Main Page Chapter 1 General Information Chapter 2 Configuration and Operation Chapter 3 Support Information Page Page Definitions, Acronyms, and Abbreviations Chapter 1 General Information 1.1 Description 1.2 M9328MX21ADSE Features 1.3 System and User Requirements 1.4 M9328MX21ADSE Diagram General Information CPU BOARDBASE BOARD M9328MX21ADSE Users Manual, Rev. A Freescale Semiconductor 1-3 Figure 1-1. M9328MX21ADSE Application Development System 1.5 ADS Specifications Chapter 2 Configuration and Operation 2.1 Introduction 2.2 Configuring Board Components Table2-1. Component Configuration Settings 2.2.1 Peripheral Selection Switch (S1) Table2-2. S1 Switch Settings Table2-1. Component Configuration Settings (continued) Figure 2-1. Switch S1 S1 2.2.2 Mode/User Switch (S2) Figure 2-2. Switch S2 Table2-3. Boot Mode Switch Settings 2-4 Freescale Semiconductor 2.3 Operation Keypad Board i.MX21 This section describes how the system functions and how to use the boards. 2.3.1 Functional Block Diagram 2.3.3 Memory Map 2.3.4 USB On-The-Go Interface 2.3.5 UART and IrDA Freescale Semiconductor 2-7 Figure 2-7. UARTs and IrDA Interface 2.3.6 Ethernet Buffer UART1 DCE DTE 2.3.7 Touchscreen ADC Figure 2-9. ADC Interface 2.3.8 CD Quality CODEC The WM8731SEDS data sheet is available at http://www.wolfsonmicro.com/ 2.3.9 Keypad Table2-5. Audio Connectors Table2-6. Keypad Layout and Connections 2.3.10 Memory Mapped I/O 2.3.10.1 Input I/O Table2-7. Input Buffer Signals 2.3.10.2 Output I/O Table2-8. Output Latch Functions 2.3.11 Audio Indicator (Buzzer) 2.3.12 LED Indicators 2.4 Using The Board Connectors 2.5 Add-On Module Connections and Usage Table2-10. M9328MX21ADSE Connectors (continued) 2-14 Freescale Semiconductor CPU BOARDBASE BOARD CPU BOARDBASE BOARD Figure 2-10. Installation of the Main Boards Figure 2-11. Installation of the PCMCIA Daughter Card LCD BOARD RIBBON CABLE 20 CONDUCTOR RIBBON CABLE 2.5.1 Using the TFT LCD Display Panel TV ENCODER CARD 2.5.2 Using the Keypad 2.5.3 Using a NAND Flash Card 2.5.4 Using a SD/MMC Card 2.5.5 Using Image Sensor Daughter Card 2.5.6 Using the PCMCIA Daughter Card 2.5.7 Using the TV Encoder Card Page Chapter 3 Support Information 3.1 Introduction 3.2 CPU to Base Board Connectors PX1, PX2, PY1, and PY2 Figure 3-1. CPU to Base Board PX1/PY1 Connector Pin Assignments 3-2 Freescale Semiconductor PX1 Table3-1. CPU to Base Board PX1/PY1 Connector Signals Page Page Page Figure 3-2. CPU to Base Board PX2/PY2 Connector Pin Assignments Freescale Semiconductor 3-7 PX2 Table3-2. CPU to Base Board PX2/PY2 Connector Signals Page Page Page 3.3 CPU to Option Card Connectors Page Table3-3. CPU to Option Card PK1 Connector Signals Figure 3-4. CPU to Option Card PK2 Connector Pin Assignments Table3-4. CPU to Option Card PK2 Connector Signals Table3-4. CPU to Option Card PK2 Connector Signals (continued) 3.4 UART/RS-232 Connectors P1 1 3.4.1 UART1 Connector 2345 9876 3.4.2 UART4 Connector P2 5 4321 6789 3.4.3 External UART Connector 3.5 Multi-ICE Connector Table3-7. Connector P3 (EXT UART) DCE Signal Descriptions RXD TXD RI CTS RTS 2345 9876 3.6 Ethernet Connector Figure 3-9. Ethernet Connector P9 Pin Numbers Table3-8. Multi-ICE Connector P20 (on the CPU) Signal Descriptions Table3-9. Ethernet Connector P9 Signal Descriptions 3.7 USB OTG Connector Figure 3-11. NAND Flash Connector PM1 (on the CPU Board) Pin Assignments Figure 3-10. USB Connector P4 Pin Assignments 3.8 NAND Flash Connector Table3-10. USB OTG Connector P4 Signal Descriptions Figure 3-12. NAND Flash Connector PM2 (on the CPU) Pin Assignments Table3-11. NAND Flash Connector PM1 Signal Descriptions Table3-12. NAND Flash Connector PM2 Signal Descriptions 3.9 External Keypad Connector Figure 3-13. External Keypad Connector P5 Pin Assignments Table3-13. External Keypad Connector P5 Signal Descriptions 3.10 LCD Panel Connector Figure 3-14. LCD Panel Connector P7 Pin Assignments Table3-14. LCD Panel Connector P8 Signal Descriptions 3.11 TV Encoder Connector Figure 3-15. TV encoder Connector P13 Pin Assignments Table3-15. TV encoder Connector P13 Signal Descriptions Table3-14. LCD Panel Connector P8 Signal Descriptions (continued) 3.12 SD/MMC Connector 3.13 Extension and Image Sensor Connectors Figure 3-17. Connectors PE1, PE2, and PE3 Pin Numbering Table3-17. Image Sensor Connector PE1 Signal Description Table3-18. Extension Connector PE2 Signal Description Table3-18. Extension Connector PE2 Signal Description (continued) Table3-19. Extension Connector PE3 Signal Description 3.14 Disposal Information Table3-19. Extension Connector PE3 Signal Description (continued) Page Page How to Reach Us: