TMC2074-NE SMSC, TMC2074-NE Datasheet - Page 69

• Manufacturer Part Number: TMC2074-NE
• Description: Network Controller & Processor ICs Standalone Mode CircLink Cntlr
• Manufacturer: SMSC

Specifications of TMC2074-NE

• Product: Controller Area Network (CAN)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Dual Mode CircLink™ Controller
Datasheet
NOTES:
SMSC TMC2074
Software reset: Resets only the units related to communication functions.
How to do software reset
1)
2)
The communication function unit will start operation within 1.0 μs (at 2.5 Mbps) after releasing
software reset. It is therefore necessary to wait for at least 1.0 μs (at 2.5 Mbps) after releasing
software reset before writing data to a register reset by software (see previous page). The writing can
be ignored.
After 10 μs (at 2.5 Mbps) following the software reset, D1h is written to address = 0 in page #00 of the
RAM and node ID value is written to the address = 1.
Values in text are at 2.5 Mbps. When 1.25 Mbps, the value should be doubled accordingly. When 5
Mbps, the value should be half of the 2.5Mbps’ respectively.
Permanent software reset
Set the RESET bit of the COMR6 register to 1
(Retains until the bit is changed to 0)
Set the node ID set to 00h
(Retains until the setting is changed to other than 00h)
Temporary software reset
Software reset occurs for 100 ns (at 20 MHz CLK input) immediately after rewriting the object bits
or writing the object registers. This reset is automatically released.
Rewriting INIMODE bit of the MODE register
Rewriting TXEN bit of COMR6 or MODE register from 0 to 1
Rewriting the following registers for INIMODE = 1
MAXID register
NID register
PS register
CKP register
The reset method is described as below.
DATASHEET
Page 69
Revision 0.2 (10-23-08)