Can Transceiver In Boot Mode - Renesas M16C/60 Series Hardware Manual

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M16C/6N5 Group

1.11.2 CAN Transceiver in Boot Mode

When programming the flash memory in boot mode via CAN bus, the operation mode of CAN transceiver
should be set to "high-speed mode" or "normal operation mode". If the operation mode is controlled by
the microcomputer, CAN transceiver must be set the operation mode to "high-speed mode" or "normal
operation mode" before programming the flash memory by changing the switch etc. Table 1.11.2 and
1.11.3 show the pin connections of CAN transceiver.
Table 1.11.2 Pin Connections of CAN Transceiver (In case of PCA82C250: Philips product)
Rs pin (Note 1) "H"
CAN communication impossible
Connection
Table 1.11.3 Pin Connections of CAN Transceiver (In case of PCA82C252: Philips product)
Note 1: The pin which controls the operation mode of CAN transceiver.
Note 2: Connect to enabled port to control CAN transceiver.
Table 1.11.3 Pin Connections of CAN Transceiver (In case of PCA82C252: Philips product)
_______
STB pin (Note 1) "L"
EN pin (Note 1) "L"
CAN communication impossible
Connection
Note 1: The pin which controls the operation mode of CAN transceiver.
Note 2: Connect to enabled port to control CAN transceiver.
Rev.1.00 2003.05.30 page 20
Standby mode
M16C/6N5
PCA82C250
CTx TxD
0
CRx RxD
0
Por Rs
t (Note 2)
Switch OFF
Sleep mode
M16C/6N5
PCA82C252
CTx TxD
0
CRx RxD
0
Por STB
t (Note 2)
Por EN
t (Note 2)
Switch OFF
"L"
possible
M16C/6N5
CANH
CANL
Por
t (Note 2)
Normal operation mode
"H"
"H"
possible
M16C/6N5
CANH
CANL
Por
t (Note 2)
Por
t (Note 2)
1.11 Precautions for CAN Module
High-speed mode
PCA82C250
CTx TxD CANH
0
CRx RxD CANL
0
Rs
Switch ON
PCA82C252
CTx TxD CANH
0
CRx RxD CANL
0
STB
EN
Switch ON