DEMO9S08DZ60 Datasheet DEMO9S08DZ60 | P10-P12

DEMO9S08DZ60 DECEMBER 2, 2006

NOTE: Set PWR_SEL jumper to VB during application development. Use barrel connector

input (PWR) to support LIN functionality if needed.

Power from the integrated BDM is drawn from the USB bus and is limited to 500 mA. This

current limit accounts for the total current supplied over the USB cable to the BDM circuit, the

target board, and any connected circuitry. Current drain in excess of 500 mA will violate the

USB specification and will cause the USB bus to disconnect. Damage to the host PC or the

target board may also result.

The on-board voltage regulator (VR1) accepts power input through a 2.0mm barrel connector

(PWR). Input voltage may range from +6V to +18V. The voltage regulator (VR1) provides a

+5V fixed output limited to 250mA. Over-temperature and over-current limit built into the

voltage regulator provides protection from excessive stress. The user must consider the

maximum output current limit of VR1 when attempting to power off-board circuitry through

connector J1.

If powered from the PWR connector, the integrated BDM may still be used to develop and

debug application code. Alternately, the board may be powered from the integrated BDM

while the LIN bus is powered from the PWR connector.

VX_EN

The VX_EN option header is a 2-pin jumper that connects or disconnects input J1-1 directly to

the target board +5V voltage rail. J1-3 is directly connected to the ground plane. Use of this

feature requires a regulated +5V input power source. This power input is decoupled to

minimize noise but is not regulated. Care should be exercised when using this feature; no

protection is applied on this input and damage to the target board may result if over-driven.

Also, do not attempt to power the target board through this connector while also applying

power through the USB-Multilink BDM or the PWR connector; damage to the board may result.

Power may also be sourced to off-board circuitry through the J1 connector. The current

supplied from the USB bus or the on-board regulator limits current output to external circuitry.

Excessive current drain may damage the target board, the host PC USB hub, or the on-board

regulator. The figure below details the VX_EN header connections.

Figure 3: VX_EN Option Header

ON OFF

1 2

Enabled Disabled

VX_EN

CAUTION: Do not exceed available current supply from USB-Multilink BDM or on-board

regulator, when sourcing power through connector J1 to external circuitry.

RESET SWITCH

DEMO9S08DZ60 DECEMBER 2, 2006

The RESET switch provides a method to apply an asynchronous RESET to the MCU. The

RESET switch is connected directly to the RESET* input on the MCU. Pressing the RESET

switch applies a low voltage level to the RESET* input. A pull-up bias resistor allows normal

MCU operation. Shunt capacitance ensures an adequate input pulse width.

LOW VOLTAGE RESET

The MC9S08DZ60 utilizes an internal Low Voltage Detect (LVD) circuit. The LVD holds the

MCU in reset until applied voltage reaches an appropriate level. The LVD also protect against

under-voltage conditions. Consult the MC9S08DZ60 reference manual for details LVD

operation.

TIMING

The DEMO9S08DZ60 provide 1 internal and 2 external timing sources. The 32 kHz internal

timing source, with ±0.2% resolution, is active out of RESET. An external crystal with ±50ppm

resolution is also provided. A full-size socket allows alternate square-wave clock inputs to be

applied. The target MCU must be configured to select either external timing input source.

Refer to the target MCU documentation for details on configuring external timing inputs.

The CLK_SEL option header selects the on-board XTAL oscillator, or the optional CLOCK

oscillator socket. The figure below shows settings for CLK_SEL option header.

Figure 4: CLK_SEL Option Header

CLK_SEL

1 2

Select XTAL oscillator X1 output

3 4

Select Clock oscillator Y1 output (default)

COMMUNICATIONS

The DEMO9S08DZ60 board applies two Serial Communications Interface (SCI) ports. SCI0 is

applied to RS-232 serial communications (COM) on the target board. SCI1 is applied to LIN

communications on the target board. RS-232 communications are supported through a DB9

connector. LIN communications are supported through a pair of 4-pin Molex connectors.

RS-232

An RS-232 translator provides RS-232 to TTL/CMOS logic level translation on the COM

connector. The COM connector is a 9-pin Dsub, right-angle connector. A ferrite bead on

shield ground provides conducted immunity protection. Communication signals TXD1 and

RXD1 are routed from the transceiver to the MCU. Hardware flow control signals RTS and

CTS are available on the logic side of the transceiver. These signals are routed to vias located

near the transceiver. RTS has been biased properly to support 2-wire RS-232

communications.

DEMO9S08DZ60 DECEMBER 2, 2006

Table 4: COM Connections

MCU Port COM Signal I/O PORT

CONNECTOR

PTE0/TXD1 TXD J1-5

PTE1/RXD1 RXD J1-7

COM Connector

A standard 9-pin Dsub connector provides external connections for the SCI0 port. The Dsub

shell is connected to board ground through a ferrite bead. The ferrite bead provides noise

isolation on the RS-232 connection. The figure below details the DB9 connector.

Figure 5: COM Connector

4, 6

1, 4

TXD

RTS

RXD

CTS

1, 6

GND

Female DB9 connector that interfaces to the MCU internal SCI0 serial

port via the RS232 transceiver. Flow control is provided at test points on

the board.

Pins 1, 4, and 6 are connected together.

LIN Communications

The DEMO9S08DZ60 applies the MC33661D Local Interconnect Interface (LIN) physical layer

(PHY) for use in developing automotive control applications. The MC33661D physical layer

interface (PHY) supports LIN bus functionality for input voltages between +6V and +18V. Only

power applied to the PWR connector will enable the LIN bus. Two, 4-pin, Molex connectors

provide off-board connectivity. The figure below shows the pin-out of the LIN connector

looking into the connector.

Figure 6: LIN Connector

LIN I/O

4 3

SUP

GND

2 1

GND

REF: Mating Connector, Molex P/N,

39-01-2040, Housing

39-00-0039, Socket

NOTE: +12V must be applied to the PWR connector when using the LIN functionality.

LIN_EN

The LIN_EN option header connects or disconnects the LIN PHY to SCI1.

Figure 7: LIN_EN Option Header

LIN_EN

4 3

TX Enable LIN TX

2 1

RX Enable LIN RX

NOTE: +12V must be applied to the PWR connector when using the LIN functionality.

P1-P3 P4-P6 P7-P9 P10-P12 P13-P15 P16-P16

DEMO9S08DZ60

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