DS2174

9 of 24

Signal Name:

TEST

Signal Description:

TEST Input

Signal Type:

Input (with internal 10k? pullup)

Test Input. Should be left floating or held high.

Signal Name:

TCLK

Signal Description:

Transmit Clock

Signal Type:

Input

Transmit Clock Input. Up to a 155MHz clock to operate the transmit circuit. Data is output at TDATn

and is updated on the rising edge of TCLK.

Signal Name:

TCLK_EN

Signal Description:

Transmit Clock Enable

Signal Type:

Input

Gaps the TCLK input to the transmit circuit.

Signal Name:

TCLKO

Signal Description:

TCLK Output

Signal Type:

Output

Output of the TCLK gapping circuit. Gapped by TCLK_EN.

Signal Name:

TDAT0 to TDAT7

Signal Description:

Transmit Data Outputs

Signal Ty pe:

Output

TDAT0. Transmit serial data/receive data bit 0 in nibble and byte mode

TDAT1.Transmit data bit 1 in nibble and byte mode

TDAT2. Transmit data bit 2 in nibble and byte mode

TDAT3. Transmit data bit 3 in nibble and byte mode

TDAT4. Transmit data bit 4 in byte mode

TDAT5. Transmit data bit 5 in byte mode

TDAT6. Transmit data bit 6 in byte mode

TDAT7. Transmit data bit 7 in byte mode

Signal Name:

D0 to D7

Signal Description:

Data I/O

Signal Type:

I/O

Parallel data pins.