Can I/O Mode; Id Code Check Function - Renesas M16C/29 Series Hardware Manual

M16C/29 Group

21.11 CAN I/O Mode

In CAN I/O mode, the user ROM area can be rewritten while the microcomputer is mounted on-board by
using a CAN programmer which is applicable for the M16C/29 group. For more information about CAN
programmers, contact the manufacturer of your CAN programmer. For details on how to use, refer to the
user's manual included with your CAN programmer.
Table 21.11.1 lists pin functions for CAN I/O mode. Figures 21.11.1 and 21.11.2 show pin connections for
CAN I/O mode.

21.11.1 ID code check function

This function determines whether the ID codes sent from the CAN programmer and those written in the
flash memory match.(Refer to "21.3 Functions To Prevent Flash Memory from Rewritng".)
Table 21.11.1 Pin Functions for CAN I/O Mode
Pin
V ,V Power input
CC SS
CNV CNV
SS
Reset input
RESET
X Clock input
IN
X Clock output
OUT
AV , AV Analog power supply input
CC SS
V Reference voltage input
REF
P0 to P0 Input port P0
0 7
P1 to P1 , P1 Input port P1
0 5 7
P1 Input port P1
6
P2 to P2 Input port P2
0 7
P3 to P3 Input port P3
0 7
P6 to P6 , P6 Input port P6
0 4 6
P6 SCLK input
5
P6 TxD output
7
P7 to P7 Input port P7
0 7
P8 to P8 ,
0 4
Input port P8
P8
7
P8 RP input
5
P8 CE input
6
P9 to P9 ,
0 1
Input port P9
P9 to P9
5 7
P9 CRX input
2
P9 CTX output
3
P10 to P10 Input port P10
0 7
Note 1: Set following either or both.
•Connect the CE pin to V
•Connect the RP pin to V
Rev.1.00 Nov 01,2004
REJ09B0101-0100Z
Name
I/O
SS
_____
.
CC
_____
and the P1
SS
page 396 of 402
Apply the voltage guaranteed for Program and Erase to Vcc pin and 0
V to Vss pin.
I Connect to Vcc pin.
I
Reset input pin. While RESET pin is "L" level, wait for td(ROC).
Connect a ceramic resonator or crystal oscillator between X
I
X pins. To input an externally generated clock, input it to X
OUT
and open X pin.
O
OUT
Connect AVss to Vss and AVcc to Vcc, respectively.
I Enter the reference voltage for AD from this pin.
I Input "H" or "L" level signal or open.
I Input "H" or "L" level signal or open.
I Connect this pin to Vcc while RESET is low. (Note 1)
I Input "H" or "L" level signal or open.
I Input "H" or "L" level signal or open.
I Input "H" or "L" level signal or open.
I Input "L" level signal.
O Input "H" level signal.
I Input "H" or "L" level signal or open.
I Input "H" or "L" level signal or open.
I Connect this pin to Vss while RESET is low. (Note 1)
I Connect this pin to Vcc while RESET is low. (Note 1)
I Input "H" or "L" level signal or open.
I Connect this pin to a CAN transceiver.
O Connect this pin to a CAN transceiver.
I Input "H" or "L" level signal or open.
pin to V .
6 CC
21. Flash Memory Version
Description
and
IN
pin
IN