Renesas R8C/25 - Manual (Page 14)

Option Link Settings
Reference Function Fitted Alternative (Removed) Related To
R22 Board VCC Connects External 3V3
(CON_3V3) to Board_VCC
External 3V3 disconnected
from Board_VCC
R20, R21
R23 Microcontroller
VCC
Supply to microcontroller Fit Low ohm resister to
measure current
R30 User I/O Power
Supply
Connects Board_VCC supply
to SW2, 3 and LED0-3
Board_VCC disconnected from
SW2, 3 and LED0-3
R31 SW1 Connects SW1 to INT0 Input Disconnected
R44 RS232 Transceiver Disables RS232 Serial
Transceiver
Enables RS232 Serial
Transceiver
R45, R46
R45 Programming
Serial Port
Connects RS232 port to
Programming SCI port
Disconnected R44, R46
R46 Programming
Serial Port
Connects RS232 port to
Programming SCI port
Disconnected R44, R45
R47 E8 Enables E8a Connection Do not connect a option
resister
R50 Microcontroller pin
function select
Connects microcontroller pin
28 to IRQ1
MUST be removed if R51 fitted R51
R51 Microcontroller pin
function select
Connects microcontroller pin
28 to IO_6
Should be removed if R50
fitted
R50
R52 Microcontroller pin
function select
Connects microcontroller pin
29 to IRQ2
MUST be removed if R53 fitted R53
R53 Microcontroller pin
function select
Connects microcontroller pin
28 to IO_7
Should be removed if R52
fitted
R52
R54 Microcontroller pin
function select
Connects microcontroller pin
27 to IRQ0
MUST be removed if R55 fitted R55
R55 Microcontroller pin
function select
Connects microcontroller pin
27 to TRIGa
Should be removed if R54
fitted
R54
R56 LIN For Master Mode For Slave Mode R59, R60, R61
R59 LIN Connects microcontroller pin
22 to LIN-NSLP
Disconnected R56, R60, R61
R60 LIN Connects microcontroller pin
23 to LIN-RXD0
Disconnected R56, R59, R61
R61 LIN Connects microcontroller pin
23 to LIN-TXD0
Disconnected R56, R59, R60
R62 CAN Do not use CAN function,
R8C/25 Microcontroller do not
have CAN function
Do not use CAN function,
R8C/25 Microcontroller do not
have CAN function
10