R8C/1A Group, R8C/1B Group 18. Flash Memory
Rev.1.30 Dec 08, 2006 Page 272 of 315
REJ09B0252-0130
18.5.1.1 Example of Circuit Application in Standard Serial I/O Mode
Figure 18.18 shows an example of Pin Processing in Standard Serial I/O Mode 2, and Figure 18.19 shows Pin
Processing in Standard Serial I/O Mode 3. Since the controlled pins vary depending on the programmer, refer to
the manual of your serial programmer for details.
Figure 18.18 Pin Processing in Standard Serial I/O Mode 2
Figure 18.19 Pin Processing in Standard Serial I/O Mode 3
NOTES:
1. In this example, modes are switched between single-chip mode and
standard serial I/O mode by controlling the MODE input with a switch.
2. Connecting an oscillator is necessary. Set the main clock frequency to
between 1 MHz and 20 MHz. Refer to “Appendix 2.1 Connection Examples
with M16C Flash Starter (M3A-0806)”.
MCU
TXD
RXD
Data Output
Data input
MODE
NOTES:
1. Controlled pins and external circuits vary depending on the programmer.
Refer to the programmer manual for details.
2. In this example, modes are switched between single-chip mode and
standard serial I/O mode by connecting a programmer.
3. When operating with the on-chip oscillator clock, it is not necessary to
connect an oscillating circuit.
MCU
MODE
RESET
User reset signal
MODE I/O
Reset input
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