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M16C/6N Group (M16C/6NK, M16C/6NM)
21.4.2 Example of Circuit Application in Standard Serial I/O Mode
Figures 21.15 and 21.16 show example of circuit application in standard serial I/O mode 1 and mode 2,
respectively. Refer to the user's manual of your serial programmer to handle pins controlled by a serial
programmer.
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.
BUSY output
NOTES:
Figure 21.15 Circuit Application in Standard Serial I/O Mode 1
NOTES:
1.In this example, modes are switched between single-chip mode and standard serial I/O
mode by controlling the CNVSS input with a switch.
Figure 21.16 Circuit Application in Standard Serial I/O Mode 2
Rev.2.00
Nov 28, 2005
REJ09B0124-0200
VCC1
SCLK input
VCC1
TXD output
RXD input
VCC1
Reset input
User reset
signal
1.Control pins and external circuitry will vary according to programmer.
For more information, refer to the programmer manual.
2.In this example, modes are switched between single-chip mode and standard serial
I/O mode by controlling the CNVSS input with a switch.
3.If in standard standard serial I/O mode 1 there is a possibility that the user reset
signal will go low during standard serial I/O 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
VCC1
Reset input
User reset
signal
page 286 of 378
Microcomputer
P6_6/CLK1
P5_0(CE)
P6_7/TXD1
P5_5(EPM)
P6_4/RTS1
CNVSS
P6_6/RXD1
RESET
P8_5/NMI
Microcomputer
P6_5/CLK1
P5_0(CE)
P6_7/TXD1
P5_5(EPM)
P6_4/RTS1
CNVSS
P6_6/RXD1
RESET
P8_5/NMI
21. Flash Memory Version
VCC2
VCC1
VCC1
VCC2
VCC1
VCC1
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