Specifications
SLWS142J − JANUARY 2003 − REVISED AUGUST 2007
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The user should configure the chip as specified in the configuration file, wait the recommended time, and then read
the checksum results and compare them to the expected results shown in Table 73.
Table 73. Expected Checksum Results
Configuration Name Wait Time
(in clocks)
Expected Results
Transmit Chan A Chan B Chan C Chan D
TCK10R0.GC101 4,000,000 0x121D − − − −
TCK100R0.GC101 4,000,000 0x61EF − − − −
RCK100R0.GC101 4,000,000 − 0x64CF 0x4747 0x7BD9 0x4747
TRCK100R0.GC101 4,000,000 0x15C8 − − 0x7BD9 0xE1CB
The files are contained in the GC5016 Diagnostic Configuration File on the TI Web site at www.ti.com.
19.1.4 Output Test Configuration
In these tests the chip is setup using the internal pattern generator to provide a simple sin wave output regardless
of the input. There is a transmit configuration (tsin_r0) and a receive configuration (rsin_r0). The transmit
configuration outputs a single real tone on each of the four output ports (AO, BO, CO, and DO) at a rate of one new
sample for each clock. The frequencies are 0.0633, 0.0711, 0.1297, and 0.1378 respectively. The receive
configuration outputs one complex tone on each port as I followed by Q followed by 14 zeros. The four frequencies
are 0.0249, 0.0498, 0.0996, and 0.1992 (of Fsout). In both cases, SO can be used to synchronize the capture of the
output if desired - its period is 2^20 clocks. The frequencies have been chosen so that the output is also periodic in
2^20 to avoid glitches at the repetition point. While the output is periodic in a general sense, it is not digitally precise
periodic due to dithering of the NCO. Use a scope to check that output data from GC5016 provides sufficient setup
and hold and signal integrity for the receiving device.
The files rsin_r0 and tsin_r0 are contained in the GC5016 Diagnostic Configuration File on the TI Web site at
www.ti.com.
19.1.5 Input Test Configuration
In this configuration (rby_r0), the chip output is the same as the chip input, only delayed by 50 cycles. This test can
be used to be sure that the input is read properly by the GC5016. Use a scope to check that input setup and hold
times are met and that the signal doesn’t have excessive ringing.