M68EVB908QL4 Datasheet M68EVB908QL4 | P10-P12

M68EVB908QL4 12/04/03

LIN-J1 / J2 PORTS

The LIN ports provide parallel connectors for attaching a LIN network. Providing two

connectors enables the user to either connect additional slave nodes or monitoring / test tools

to the board without special wiring harness creation. The QL4 device provides a LIN Slave

type node on the LIN Network. A LIN physical layer transceiver (MC33661, or similar) is

provided between the QL4 device and the LIN network connectors. Refer to the MC33661

data sheet for complete details of transceiver operation. The following diagram represents the

LIN connection:

The LIN interface provides optional features of Enable control (LIN_EN option), Wake switch,

and input power source option - PWR_SEL. See the PWR_SEL option in the power supply

section of this manual for information on this option.

LIN_EN Option

The LIN_EN option allows enable control of the LIN transceiver. With a transceiver such as the

MC33661, software control of the EN pin allows the user to set the slew rate control of the

transceiver. This feature allows the EMC characteristics of the physical layer to be tuned to

the needs of the application. Three options are available:

LIN_EN = OPEN: (No option jumper installed) The transceiver is disabled and in sleep mode,

no LIN output messages will be possible. Pin 2 of the option pins can be wired to any available

HC08 port to provide the enable signal. The WAKE switch maybe applied to enable the

transceiver also.

LIN_EN = 1-2 jumper position: QL4 port PBT7 provides transceiver output control. PTB7

output high will enable the transceiver to allow LIN messages.

LIN_EN = 2-3 jumper position: Transceiver is always enabled. Port PTB7 maybe applied for

other purposes with this option setting.

WAKE Switch

The WAKE switch applies the Wake up function of the transceiver. With LIN_EN option open,

the switch will wake-up the transceiver. Wake also has a test pad for remote connections.

M68HC908QL4

PTB4/SLCRx

PTB5/SLCTx

MC33661

LIN-J1

LIN-J2

M68EVB908QL4 12/04/03

LIN Connectors and Options

The LIN network connectors (LIN-J1 and LIN-J2) provide a standard pin configuration with a

network option position.

Front view (looking into connector from outside of board edge)

LIN Signal 4 3 +VSUP Input Mating connector = Molex 39-01-2040 with

Option pin 2 1 Ground 39-00-0039 pins

Option pin 2 on the LIN connectors provides an additional ground or Test Pad to apply another

signal with the network. Test pad TP2 provides option access to LIN-J1 and TP3 provides

option access to LIN-J2. Option pad set 1 and 2 will provide connections to ground for LIN_J1

and LIN-J2 option pin 2 respectfully.

MC68HC980QL4 PORT CONNECTORS

MCU_PORT

The MCU PORT provides access to the MC68HC908QL4 I/O ports. Port configuration reflects

the DIP package device pin and signal order.

+5V (VDD)

1 16

GND (VSS)

PTA1/TCH1/KBI1

2 15

PTA0/AD0/KBD0

PTA2/IRQ*/KBI2/TCLK

3 14

PTA5/OSC1/AD3/KBD5

PTA3/RST*/KBI3

4 13

PTA4/OSC2/AD2/KBI4

PTB0/TCH0

5 12

PTB4/SLCRX

PTB3/AD5

6 11

PTB5/SLCTX

PTB2/AD4

7 10

PTB6

PTB1

8 9

PTB7

Notes:

1) PTA0 – 2, PTA4, and PTA5 applied with CYCLONE cable if installed.

2) PTA0 is also the MON08 debug monitor serial I/O (MON_EN).

3) PTA2 provides IRQ Push Switch input (JP1) or Monitor mode entry voltage (MON_EN).

4) PTA3 provides RESET Push Switch input (JP1).

5) PTB0 provides D1 indicator output (JP1).

6) PTB3/AD5 provides RV1 user pot input (JP1).

7) PTB4 provides LIN serial input (SLCRX).

8) PTB5 provides LIN serial output (SLCTX).

M68EVB908QL4 12/04/03

CYCLONE PORT

The Cyclone port is a 16 pin header compatible with a Cyclone development cable. Applying

this cable allows supporting host tools to load and control the QY4 during development. The

MON_EN, JP1 position 1, CLK_EN, and +5V_EN option jumpers should be open when

applying this port.

N/C

1 2

GND (VSS)

N/C

3 4

TP4

N/C

5 6

PTA2/IRQ*

N/C

7 8

PTA0/MON08 I/O

N/C

9 10

PTA4

N/C

11 12

PTA1

PTA5/OSC1

13 14

N/C

+5V

15 16

N/C

N/C = No connection

TROUBLESHOOTING

The M68EVB908QL4 is fully tested and operational before shipping. If it fails to function

properly, inspect the board for obvious physical damage first. Verify the setup as described

under GETTING STARTED and START-UP sections of this manual.

1. Verify proper installation of a MC68HC908QL4 in the U1 or U2 socket (not both).

2. Disconnect all external connections to the board except for the serial cable to the PC and

the wall plug. If applying the Cyclone cable, check it’s operation or remove it.

3. Verify the wall plug connections to outlet and the power connector.

4. Verify the power source is enabled and the PWR_EN option is correctly installed.

5. Verify the +5V_EN option is installed and the Power indicator is ON. You should measure

+5V on the +5V_EN jumper center.

6. Contact support@axman.com by email for further assistance. Provide board name and

describe the problem.

P1-P3 P4-P6 P7-P9 P10-P12 P13-P13

M68EVB908QL4

Mfr. #:

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