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Rev.2.00 Nov 28, 2005 page 365 of 378
REJ09B0124-0200
M16C/6N Group (M16C/6NK, M16C/6NM) 23. Usage Precaution
Under development
This document is under development and its contents are subject to change.
23.14.3 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 23.4 and 23.5 show recommended pin connections.
Table 23.4 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
i = 0, 1
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 23.5 Recommended Pin Connections (In case of PCA82C252: Philips product)
M16C/6NK, M16C/6NM
PCA82C250
CTXi
CRXi
Por
t
(3)
TXD
RXD
Rs
CANH
CANL
"H" output
PCA82C250
CTXi
CRXi
TXD
RXD
Rs
CANH
CANL
M16C/6NK, M16C/6NM
Port
(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
i = 0, 1
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
CTXi
CRXi
TXD
RXD
STB
CANH
CANL
EN
M16C/6NK, M16C/6NM
Por
t
(3)
Por
t
(3)
"L" output
PCA82C252
CTXi
CRXi
TXD
RXD
STB
CANH
CANL
EN
M16C/6NK, M16C/6NM
Port
(3)
Port
(3)
"H" output