TMC2074-NE SMSC, TMC2074-NE Datasheet - Page 66

• 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

2.15
Revision 0.2 (10-23-08)
GP-I/O Direction –
GP-I/O Data register
(0: Output , 1: Input)
Control register
8-Bit General-purpose I/O Port (New function)
When CircLink is used in the peripheral mode, 11* or more General-purpose I/O ports (GPIO) are utilized
as the CPU interface with CircLink. (*for 8-bit data bus and Multiplex bus mode).
Eight GPIOs are added to the CircLink side as the substitution (GPIO7-0 pins).
Two registers named "Direction control register" and "Data register" are added for the GP-I/O control.
Moreover, to allocate these registers in COMR7 (Address=0Eh), the subaddress is enhanced by one bit
(SUBAD3).
- Sub address register -> Sub Address : SUBAD3-0 (Address=0Ah)
- Direction Control register -> GP-I/O Direction : nGPOE7-0 (Address=0Eh, SUBAD=1011)
- Data register -> GP-I/O Data : GPD7-0 (Address=0Eh, SUBAD=1010)
nGPOE x
GPD x
(x : 0-7)
The subaddress is enhanced by SUBAD3 bit
GP-I/O Direction Control register --- The direction can be set by every one bit.
GP-I/O Data register
nGPOEx = 0 : Output mode
nGPOEx = 1 : Input mode
GPD7-0 : Write operation ----
: Read operation ----
D Q
D Q
DATASHEET
R
S
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Write data which outputs to GPIP7-0 pin
Read the state of the GPIO7-0 pin
4mA
TTL
Vdd
GPIO x pins
(x : 0-7)
GP-I/O diagram
Dual Mode CircLink™ Controller
(per 1bit)
SMSC TMC2074
Datasheet