M16C6NK Datasheet, PDF (383/404 Pages) Renesas Technology Corp – 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/60 SERIES

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M16C/6N Group (M16C/6NK, M16C/6NM)
23. Usage Precaution
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
M16C/6NK, M16C/6NM
PCA82C250
M16C/6NK, M16C/6NM
PCA82C250
CTXi
CRXi
TXD CANH
RXD CANL
CTXi
CRXi
TXD CANH
RXD CANL
Port ⁽³⁾
Rs
Port ⁽³⁾
Rs
"H" output
"L" output
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)
_______
STB Pin ⁽¹⁾
“L”
Sleep Mode
Normal Operation Mode
“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
M16C/6NK, M16C/6NM
PCA82C252
M16C/6NK, M16C/6NM
PCA82C252
CTXi
CRXi
TXD CANH
RXD CANL
CTXi
CRXi
TXD CANH
RXD CANL
Port ⁽³⁾
STB
Port ⁽³⁾
STB
Port ⁽³⁾
EN
Port ⁽³⁾
EN
"L" output
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.
"H" output
Rev.2.00 Nov 28, 2005 page 365 of 378
REJ09B0124-0200