LCD Type MCU
HT-ICE Interface Card Settings
The HT-ICE interface card (CPCB49C000001B) as shown below, is a PCB used to connect the
HT-ICE emulator to user¢s target board. It has the following functions:
·
External clock source
·
External signal trace input
·
MCU pin assignment, I/O and LCD segments, commons output signal
C O N 2
V R 2
J 5
J 6
J 1
C O N 1
J 3
J 4
J 2
Y 1
V R 1
J 7
The external clock source has two modes, RC and Crystal. If a crystal clock is to be used, posi-
tions 2 and 3 should be shorted on J2 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 VR1. Refer to the Tools/Mask Option menu of the HT-IDE3000 User¢s Guide for the clock
source and system frequency selection. VR2 is used to adjust the LCD voltage, VLCD.
The four external signal trace inputs, marked as ET0 to ET3 at jumper location J3, provide a
means for external signals to trigger the internal breakpoint and trace functions. For more informa-
tion, refer to the chapters on Breakpoint and Trace the Application Program within the Holtek
HT-IDE3000 User¢s Guide.
The J1 and J4~J7 connectors are used for different MCUs whose assignment is shown in the fol-
lowing table.
Part No.
HT49R30A-1/HT49C30-1/HT49C30L
HT49R50A-1/HT49C50-1/HT49C50L
HT49R70A-1/HT49C70-1/HT49C70L
HT49RU80/HT49CU80
Socket
J7 or J1+J4
J6 or J1+J4
J5+J6 or J1+J4
J1+J4
160
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