Can Transceiver In Boot Mode - Renesas M16C/29 Series User Manual

M 1 6 C 2 / 9 G o r u p

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)
Rs pin (Note 1) "H"
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.
Table 22.4 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.
R e . v 1 1 . 2 M r a 3 . , 0 2 0 0 7
R E J 0 9 B 0 1 0 1 0 - 1 1 2
Standby mode
M16C/29
PCA82C250
CTx TxD
0
CRx RxD
0
Por (2) Rs
t
Switch OFF
Sleep mode
M16C/29
PCA82C252
CTx TxD
0
CRx RxD
0
Por (2) STB
t
Por (2) EN
t
Switch OFF
page 444
f o 4 5 8
"L"
possible
M16C/29
CANH
CANL
"H"
"H"
possible
M16C/29
CANH
CANL
22. Usage Notes
High-speed mode
PCA82C250
CTx TxD CANH
0
CRx RxD CANL
0
Por (2) Rs
t
Switch ON
Normal operation mode
PCA82C252
CTx TxD CANH
0
CRx RxD CANL
0
Por (2) STB
t
Por (2) EN
t
Switch ON