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WM8233 Fiches technique(PDF) 49 Page - Cirrus Logic |
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WM8233 Fiches technique(HTML) 49 Page - Cirrus Logic |
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49 / 146 page ![]() WM8233 Rev 4.7 49 TEST PATTERN GENERATOR WM8233 has test pattern generator which can be used for interface verification between AFE data output and back-end devices without sensor signal input. This function can be presented in several different patterns by PGPAT[1:0] and PGMARCH registers as shown below. The PGLEVEL, PGWIDTH1 and PGWIDTH2 are the parameter to define the pattern level and width. The PGLEVEL register has 16bit length, PGWIDTH1 and PGWIDTH2 has 8bit length. Note that test pattern generator is required TGSYNC input. (i.e. this can be used under TG slave mode operation only.) PGEN (register) PGPAT=00 (Fixed Pattern) 0 0 d 2d 0 0 0 d 0 d 0 d 0 nd 0 0 0 d md 0 d B A A B A B A A 0 TGSYNC (input) A PGPAT=01 (Vertical RAMP) PGPAT=10 (Horizontal RAMP) PGPAT=11 (Patch) d=PGLEVEL A=PGWIDTH1 B=PGWIDTH2 65535 0 Return to 0 at 65535 Figure 32 Test Pattern Output Data Formats A d d d d d d d d A A A A A A A B A B A B A B A B B A d d d d d d 0 0 A A A A A A A A 0 d 2d 3d 4d 5d 6d 7d A A A A A A A 0 d 2d 3d 4d 5d 6d A A A A A A A PGINV=0 B A ~d ~d ~d ~d ~d ~d A A A A A A A A A A A A A A A ~0 ~d ~2d ~3d ~4d ~5d ~6d ~7d ~0 ~d ~2d ~3d ~4d ~5d ~6d TGSYNC TGSYNC TGSYNC ~0 ~0 PGINV=1 PGPAT=01 PGPAT=10 PGPAT=11 d=PGLEVEL A=PGWIDTH1 B=PGWIDTH2 (Vertical RAMP) (Horizontal RAMP) (Patch) Figure 33 Test Pattern Output image |
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