IBM H8 user manual Start-Up instructions, Installing the HTEB1

HTEB1

User manual

1.7 Start-Up instructions

1.7.1Installing the HTEB1

Installing the HTEB1 requires a power supply and a serial connection to a host computer (common PC). The serial communications cable for connecting the HTEB1 to a host computer is supplied and has 1:1 connectivity.

PC with COM1/2

Power supply 7,5-9V DC

Figure 1.8 shows how to connect the HTEB1 to a PC and to a power supply

1.7.2Power Supply

The HTEB1 hardware requires a power supply of 7,5V DC at minimum. Please don’t use a power supply with more the 9V DC because the on board voltage regulator becomes very hot!

The HTEB1 power consumption is about 180mA with LCD-backlight ON. Since total power consumption can vary widely due to external connectors, H8/3664F port state, use a power supply capable of providing at least 300mA at +7,5V DC.

The design includes circuitry for reversed polarity protection.

Please watch on GND (ground) connection between power supply, eval- board and PC.

Issue 0.2 Page 12 07/2002