About the article



This small board will conveniently replace the installation of several components when using the R8C 16-bit Tom Thumb module for programming. You’ll find the transistors and their corresponding resistors, the Reset button and the Mode switch, all familiar from our first article on the R8C/13.
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Component list
R1 = 100k
R2 = 4k7
R3 = 27k
R4 = 10k
T1 = BC548C
T2 = BC558C
S1 = pushbutton (Reset)
S2 = slide switch, PCB mount (Mode)
K1 = 9-way sub-D socket (female) for cable mounting (RS232)
K2 = 6-way gold-plated SIL pinheader
1 m shielded cable with 2 conductors
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