M16C1N Datasheet, PDF (211/238 Pages) Renesas Technology Corp – RENESAS 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/10 SERIES

M16C/1N Group
19. Flash Memory Version
(1) Example for Processing Pins when Using Standard Serial Input/Output Mode
Figure 19.14 and 19.15 show example for processing pins when using standard serial I/O mode 1 and
mode 2, respectively. Control pins will vary according to programmer, therefore refer to the program-
mer manual for more information.
Note that when using standard serial I/O mode 2, make sure a main clock input oscillation frequency
is set to 10 or 16 MHz.
Clock input
Data output
BUSY output
Data input
Reset input
Microcomputer
(P16)SCLK
(P14)TXD
CE(P31)
(P17)BUSY
(P15)RxD
CNVss
SEL(P30)
User reset
signal
RESET
CAN transceiver
CRx
CAN H _{CAN H}
CTx
CAN L _{CAN L}
(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 serial I/O mode 1 there is a possibility that the user reset signal will go
low during serial I/O mode, break the connection between the user reset signal and
RESET pin by using, for example, a jumper switch.
Figure 19.14 Example for processing pins when using standard serial I/O mode 1
Rev.1.00 Oct 20, 2004 page 199 of 222
REJ09B0007-0100Z