Technical data

Hardware and Firmware

Hardware Descriptions

DRM043/D — Rev 0 Designer Reference Manual

MOTOROLA Hardware and Firmware 11

If the battery is built in with a NTC, the NTC Z1 on the demo board can

be removed.

2.2.4 Charging status

PTA3 is used to control the on-off of two LEDs to indicate different

charging status( see Table 2-1).

To turn on both LEDs, PTA3 is set as input. When set to output high, it

will turn on the Green LED. When set as output low, it will turn on the

Red LED.

2.2.5 In-Circuit-Programming

J2 contains the signals for the MCU68HC908QT2 to enter monitor mode

for ICP. The ICP requires connecting J2 with a cable to the ICP adaptor

board, which is plugged-into the M68HC08 Serial Programmer

(M68SPGRM08) (see Figure 2-2). The signals from the J2 are Vdd, Vss,

Vtst and OSC1 and PA0. Beside these signals, enter monitor mode also

required PTA1 pull-up and PTA4 pull-down. When ICP, the jumper J3

must be opened to disconnect the filter cap, 0.1uF at PTA0/AD0.

The programming software is the PROG08SZ.exe from P&E. Select

Class I for Target Hardware Type. The baud rate is 4800bps. The ICP

support erase, programming and verify the firmware in the MCU.

Table 2-1. Charging Status

RED GREEN

Fast Charge in progress On Off

Battery is fully charged Off On

Battery is not connected On On

Fault condition occurred --Flashing--

Frees

cale Semiconductor,

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

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