CPCB49C000001A Interface Card
4
CPCB49C000001A Interface Card
This interface card is used in conjunction with the
CICE49C00CCAA
J P 4
J P 3
V R 1
V R 2
J P 2
J P 5
J P 1
Y 1
The external clock source has two modes, RC and Crystal. If a crystal clock is to be
used, positions 2 and 3 should be shorted on JP1 and a suitable crystal inserted into
location Y1. Otherwise, if an RC clock is to be used, positions 1 and 2 should be
shorted and the system frequency adjusted using VR2. Refer to the Tools/Mask
Option menu of the HT-IDE3000 User
′
s Guide for the clock source and system
frequency selection. VR1 is used to adjust the LCD voltage, VLCD.
The four external signal trace inputs, marked as ET0 to ET3 at jumper
location JP5, provide a means for external signals to trigger the internal
breakpoint and trace functions. For more information, refer
to
the chapters on
Breakpoint and Trace the Application Program within the Holtek HT-IDE3000
User
′
s Guide.
Connector JP2 is used for the HT49R30A-1/HT49C30-1 devices with 48-pin packages
while connector JP3 is used for the HT49R50A-1/HT49C50-1 devices with 48-pin
packages. For the HT49R50A-1/HT49C50-1 devices with 100-pin packages and for
the HT49R70A-1/HT49C70-1, it is necessary to use both the JP3 and JP4 connectors.
