Example Of Circuit Application In Standard Serial I/O Mode - Renesas M16C/29 Series Hardware Manual

M16C/29 Group

21.9.2 Example of Circuit Application in Standard Serial I/O Mode

Figure 21.9.2.1 shows an example of a circuit application in standard serial I/O mode 1 and Figure
21.9.2.2 shows an example of a circuit application in standard serial I/O mode 2. Refer to the user's
manual for a serial writer to handle pins controlled by the serial writer.
SCLK input
TxD output
BUSY output
RxD input
Reset input
(1) Controlling pins and external circuits vary with the serial programmer. For more
information, refer to the user's manual included with the serial programmer.
(2) In this example, a selector controls the input voltage applied to CNVss to switch
between single-chip mode and standard serial I/O mode.
(3) In standard serial input/output mode 1, if the user reset signal becomes "L" while
the microcomputer is communicating with the serial programmer, break the
connection between the user reset signal and the RESET pin using a jumper
switch.
Note 1. Set following either or both.
•Connect the CE pin to V
•Connect the RP pin to V
Figure 21.9.2.1. Circuit Application in Standard Serial I/O Mode 1
Rev.1.00 Nov 01,2004
REJ09B0101-0100Z
User reset
singnal
CC
SS
page 393 of 402
Microcomputer
SCLK
T D
X
BUSY
RxD
RESET
and the P1 pin to V
6 CC
21. Flash Memory Version
(Note 1)
P8 (CE)
6
(Note 1)
P1
6
CNVss
P8 (RP)
5
(Note 1)