M16C26A Datasheet, PDF (275/352 Pages) Renesas Technology Corp – 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/Tiny SERIES

M16C/26A Group (M16C/26A, M16C/26B, M16C/26T)
17. Flash Memory Version
17.9.2 Example of Circuit Application in Standard Serial I/O Mode
Figure 17.9.2.1 shows an example of a circuit application in standard serial I/O mode 1 and Figure
17.9.2.2 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
Microcomputer
(1)
SCLK
P86(CE)
TXD
(1)
BUSY output
RxD input
BUSY
P16
RxD
Reset input
User reset
singnal
RESET
CNVss
P85(RP)
(1)
(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 VCC
• Connect the RP pin to VSS and the P16 pin to VCC
Figure 17.9.2.1. Circuit Application in Standard Serial I/O Mode 1
Rev. 2.00 Feb.15, 2007 page 258 of 329
REJ09B0202-0200