Renesas RL78 Series User Manual

RL78/F13, F14 CHAPTER 18 CAN INTERFACE (RS-CAN LITE)
R01UH0368EJ0210 Rev.2.10 1380
Dec 10, 2015
18.4 CAN Modes
The CAN module has four global modes to control entire CAN module status and four channel modes to control
individual channel status. Details of global modes are described in 18.4.1, and details of channel modes are described in
18.4.2.
• Global stop mode : Stops clocks of entire module to achieve low power consumption.
• Global reset mode : Performs initial settings for entire module.
• Global test mode : Performs test settings and performs RAM test.
• Global operating mode : Makes entire module operable.
• Channel stop mode : Stops channel clock.
• Channel reset mode : Performs initial settings for channels.
• Channel halt mode : Stops CAN communication and enables channel test.
• Channel communication mode : Performs CAN communication.
18.4.1 Global Modes
Figure 18-2 shows the transitions of global modes.
Figure 18-2. Transitions of Global Modes
Channel modes transition in some cases with transitions of global modes. Table 18-5 shows the transitions of channel
modes depending on the global mode setting by the GMDC[1:0] bits and the GSLPR bit.
Table 18-5. Transitions of Channel Modes Depending on Global Mode Setting (GMDC[1:0] and GSLPR Bits)
Channel Mode before
Setting
Channel Mode after Setting
Note
GMDC[1:0] = B'00
GSLPR = 0
(Global Operation)
GMDC[1:0] = B'10
GSLPR = 0
(Global Test)
GMDC[1:0] = B'01
GSLPR = 0
(Global Reset)
GMDC[1:0] = B'01
GSLPR = 1
(Global Stop)
Channel
communication
Channel communication Channel halt Channel reset Transition prohibited
Channel halt Channel halt Channel halt Channel reset Transition prohibited
Channel reset Channel reset Channel reset Channel reset Channel stop
Channel stop Channel stop Channel stop Channel stop Channel stop
Note GMDC[1:0], GSLPR: Bits in the GCTRL register.
GMDC[1:0] = B'00
GMDC[1:0] = B'01
GSLPR = 0
GSLPR = 1
GMDC[1:0] = B'00
GMDC[1:0] = B'10
GMDC[1:0] = B'01
GMDC[1:0] = B'10
CAN reset
Global test mode
Global stop mode
Global reset mode
Global operating
mode
GSLPR, GMDC[1:0]: Bits in the GCTRL registerRemark

Renesas RL78 Series Specifications

General

Brand	Renesas
Model	RL78 Series
Category	Computer Hardware
Language	English