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Rev.1.02 Jul 01, 2005 page 302 of 314
REJ09B0126-0102
M16C/6N Group (M16C/6NL, M16C/6NN) 22. Usage Precaution
Under development
This document is under development and its contents are subject to change.
22.13.3 Suggestions to Reduce Power Consumption
When not performing CAN communication, the operation mode of CAN transceiver should be set to
“standby mode” or “sleep mode”.
When performing CAN communication, the power consumption in CAN transceiver in not performing
CAN communication can be substantially reduced by controlling the operation mode pins of CAN
transceiver.
Tables 22.4 and 22.5 show recommended pin connections.
Table 22.4 Recommended Pin Connections (In case of PCA82C250: Philips product)
Standby Mode High-speed Mode
Rs Pin
(1)
“H”“L”
Power Consumption in
less than 170 µA less than 70 mA
CAN Transceiver
(2)
CAN Communication
impossible possible
Connection
NOTES:
1.The pin which controls the operation mode of CAN transceiver.
2.In case of Ta = 25 °C
3.Connect to enabled port to control CAN transceiver.
Table 22.5 Recommended Pin Connections (In case of PCA82C252: Philips product)
M16C/6NL, M16C/6NN
PCA82C250
CTX0
CRX0
Por
t
(3)
TXD
RXD
Rs
CANH
CANL
"H" output
PCA82C250
CTX0
CRX0
TXD
RXD
Rs
CANH
CANL
M16C/6NL, M16C/6NN
Por
t
(3)
"L" output
Sleep Mode Normal Operation Mode
_______
STB Pin
(1)
“L”“H”
EN Pin
(1)
“L”“H”
Power Consumption in
less than 50 µA less than 35 mA
CAN Transceiver
(2)
CAN Communication
impossible possible
Connection
NOTES:
1.The pin which controls the operation mode of CAN transceiver.
2.Ta = 25 °C
3.Connect to enabled port to control CAN transceiver.
PCA82C252
CTX0
CRX0
TXD
RXD
STB
CANH
CANL
EN
M16C/6NL, M16C/6NN
Por
t
(3)
Por
t
(3)
"L" output
PCA82C252
CTX0
CRX0
TXD
RXD
STB
CANH
CANL
EN
M16C/6NL, M16C/6NN
Por
t
(3)
Por
t
(3)
"H" output