Register Addresses; Clock Supply - Renesas RZ/A Series User Manual

RZ/A1L Group, RZ/A1LU Group, RZ/A1LC Group
21.1.2

Register addresses

RS-CAN base addresses are listed in the following table.
RS-CAN register addresses are given as offsets from the base addresses.
Table 21.4
Base Address Name
<RSCAN0_base>
21.1.3

Clock supply

The RS-CAN provides two clock inputs:
Table 21.5
RSCAN0
The operating frequency of the RS-CAN depends on the transfer rate and the number of channels in
use. Table 21.6 shows the range of the frequency.
Table 21.6
Transfer
Rate
1 Mbps
500 kbps
125 kbps
Note 1.
Note 2.
R01UH0437EJ0600 Rev.6.00
Jan 29, 2021
Register base address
E803 A000
RS-CAN clock supply
Module
clk_xincan
clkc
pclk
Range of Operating Frequency Depending on the Transfer Rate and the Number of
Channels in Use in this LSI
Condition
No. of
Channels in
Use pclk
2ch pclk ≥ 26 MHz
1ch pclk ≥ 18 MHz
2ch pclk ≥ 13 MHz
1ch pclk ≥ 8 MHz
2ch pclk ≥ 8 MHz
1ch
Setting the DCS bit in RSCAN0GCFG enables to select either clk_xincan or clkc. Set clocks less than or
equal to pclk/2.
Select clk_xincan when pclk < 25 MHz.
Base Address
H
RS-CAN clock
Clock
CAN_CLK
P1 φ /2
P1 φ
Range of Operating Frequency
clk_xincan*
8 MHz ≤ clk_xincan ≤ pclk/2
4 MHz ≤ clk_xincan ≤ pclk/2
4 MHz ≤ clk_xincan ≤ pclk/2
21. CAN Interface
Connected to
1 1,
clkc*
12.5 MHz ≤ clkc ≤ pclk/2
12.5 MHz ≤ clkc ≤ pclk/2
12.5 MHz ≤ clkc ≤ pclk/2
2
*
21-2