Freescale-semiconductor i.MX27 PDK 1.0 Manual do Utilizador descarregar pdf (Página 13)

i.MX27 PDK 1.0 Hardware User's Guide, Rev. 1.0 Freescale Semiconductor

2-2

Table 2-1 Debug Board, Top Components

Component Description

S1 Power button, connected to the ON1B input of the MC13783 through the 500 pin connector.

The line is pulled up, and pushing it grounds the line. If MC13783 is in Off, User Off or

Memory Hold Mode, the board can be powered on by pushing the button

S2 Reset button, which resets the Debug board

S3 System reset switch, connected to the RESETB to MX27. The line is pulled up, and pushing it

grounds the line.

S4 Power on switch, which powers up the Debug board when set to 1.

J1 10/100 Base T Ethernet RJ45 Connector

J2 5.0V DC power connector

J3 Current measure connector; measures the current at various points of CPU Engine and

Personality board from the connector

F1 Re-settable fuse; re-settable over-current protection

D1 – D8 LEDs for CPLD debug

D9 LED for debug board 3.3V power; the LED will be bright when debug 3.3V is power on

D11 LED for DC power supply; the LED will be bright when 5.0V DC power is supplied

P1 WEIM Address measure connector; can support CodeTest Interface Probe

P2 WEIM Data measure connector; can support CodeTest Interface Probe

BT1, BT2 Test buttons for CPLD

CN1 i.MX27 JTAG connector

CN2 Debug board CPLD JTAG connector

CN3 Personality board CPLD JTAG connector (Reserved)

CN74 500 pins connector to Personality board

CON4 UART (DCE) DB9 female connector

Enable switch; the switch designation settings follow.

ON Serial port UART (DTE) CON3 is selected SW4-1 UART Port Select

OFF Serial port UART (DCE) CON4 is selected

ON Enable NorFlash on Debug board SW4-2 NorFlash Enable

OFF Disable Norflash on Debug board

ON Power supply to three boards

SW4

SW4-8 Power Enable

OFF Power supply to Debug board only

Boot mode setting switches; SW5 to SW10 settings determine where the processor begins

program execution; the valid combinations of the switch settings follow.

Boot mode device SW5 Boot4

SW6

Boot3

SW7

Boot2

SW8

Boot1

SW9

Boot0

SW10

UART/USB Bootloader X 0 0 0 0 0

SW5 – SW10

8-bit NAND Flash

(2KB page) Ext

X 0 0 0 1 0

1 2 ... 8 9 10 11 12 13 14 15 16 17 18 ... 52 53

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