Specifications

Configuration Mode

10-36

10.7 Configuration Mode

The CAN module must be initialized before activation. This is only possible

when the module is in the configuration mode, which is set by programming

CCR with 1. The initialization can be performed only if the status bit CCE con-

firms the request by getting 1. Afterwards, the bit configuration registers can

be written. The module is activated again by programming the control bit CCR

with zero. After a hardware reset, the configuration mode is active.

Figure 10–23. CAN Initialization

normal mode (CCR = 0)

(CCE = 0)

wait for configuration mode (CCR = 1)

(CCE = 0)

configuration mode requested

(CCR = 1)

(CCE = 0)

configuration mode active (CCR = 1)

(CCE = 1)

changing of bit timing

parameters enabled

normal mode requested

(CCR = 0)

(CCE = 1)

wait for normal mode

(CCR = 0)

(CCE = 1)