Renesas M16C/60 Series Hardware Manual page 296

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M16C/6N5 Group
Example of Circuit Application in Standard Serial I/O Mode
Figures 1.22.14 and 1.22.15 show example of circuit application in standard serial I/O mode 1 and mode 2,
respectively. Refer to the user's manual for serial writer to handle pins controlled by a serial writer.
Note that when using the standard serial I/O mode 2, make sure a main clock input oscillation frequency
is set to 5 MHz, 10 MHz or 16 MHz .
Figure 1.22.14 Circuit Application in Standard Serial I/O Mode 1
In this example, modes are switched between single-chip mode and standard serial
input/output mode by controlling the CNVss input with a switch.
Figure 1.22.15 Circuit Application in Standard Serial I/O Mode 2
Rev.1.00 2003.05.30 page 282
SCLK input
TxD output
BUSY output
RxD input
Reset input
User reset
signal
Control pins and external circuitry will vary according to programmer.
For more information, refer to the programmer manual.
In this example, modes are switched between single-chip mode and standard serial
input/output mode by controlling the CNVss input with a switch.
If in standard serial input/output mode 1 there is a possibility that the user reset signal
will go low during serial input/output mode, break the connection between the user
reset signal and RESET pin by using, for example, a jumper switch.
TxD output
Monitor output
RxD input
Microcomputer
P6 /CLK
1
6
P5 (CE)
0
P6 /TxD
7 1
P5 (EPM)
5
P6 /RTS
1
4
P6 /RxD CNVss
1
6
RESET
P8 /NMI
5
Microcomputer
P6 /CLK
5 1
P5 (CE)
0
P6 /TxD
P5 (EPM)
7 1
5
P6 /RTS
4 1
CNVss
P6 /RxD
6 1
P8 /NMI
5
Flash Memory