M16C29 Datasheet, PDF (468/499 Pages) Renesas Technology Corp – RENESAS MCU M16C FAMILY / M16C/Tiny SERIES

M16C/29 Group
22. Usage Notes
22.11.2 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
MCU, 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. Tables 22.3 and 22.4 show pin con-
nections of CAN transceiver.
Table 22.3 Pin Connections of CAN Transceiver (In case of PCA82C250: Philips product)
Standby mode
Rs pin (Note 1) “H”
CAN communication impossible
Connection
M16C/29
PCA82C250
“L”
possible
High-speed mode
M16C/29
PCA82C250
CTx0
CRx0
TxD CANH
RxD CANL
CTx0
CRx0
TxD CANH
RxD CANL
Port ⁽²⁾
Rs
Port ⁽²⁾
Rs
Switch OFF
Switch ON
Note 1: The pin which controls the operation mode of CAN transceiver.
Note 2: Connect to enabled port to control CAN transceiver.
Table 22.4 Pin Connections of CAN Transceiver (In case of PCA82C252: Philips product)
_______
STB pin (Note 1) “L”
Sleep mode
Normal operation mode
“H”
EN pin (Note 1) “L”
“H”
CAN communication impossible
possible
Connection
M16C/29
PCA82C252
M16C/29
PCA82C252
CTx0
CRx0
TxD CANH
RxD CANL
CTx0
CRx0
TxD CANH
RxD CANL
Port ⁽²⁾
STB
Port ⁽²⁾
STB
Port ⁽²⁾
EN
Port ⁽²⁾
EN
Switch OFF
Switch ON
Note 1: The pin which controls the operation mode of CAN transceiver.
Note 2: Connect to enabled port to control CAN transceiver.
Rev. 1.12 Mar.30, 2007 ^{page 444} of 458
REJ09B0101-0112