M16C6S_09 Datasheet, PDF (181/208 Pages) Renesas Technology Corp – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

M16C/6S Group
Flash Memory Version
Example of Circuit Application in the Standard Serial I/O Mode
Figure 1.22.1 and 1.22.2 show example of circuit application in standard serial I/O mode 1 and mode 2,
respectively. Refer to the user's manual for serial programmer to handle pins controlled by a serial
programmer.
Clock input
Data input
BUSY output
Data output
Microcomputer
SCLK
TXD
P15(CE)
BUSY
RxD
CNVss
Reset input
User reset
signal
RESET
(1) Control pins and external circuitry will vary according to programmer.
For more information, see the programmer manual.
(2) In this example, modes are switched between single-chip mode and standard serial
input/output mode by controlling the CNVss input with a switch.
(3) 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.
Figure 1.22.1. Circuit Application in Standard Serial I/O Mode 1
Rev.5.01 Dec 10, 2009 page 181 of 201
REJ03B0014-0501