User`s manual

Am186™CC Microcontroller Router Reference Design User’s Manual
D-7
SBP/PCM Mode
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" U43 PLD code for the Am186CC Router Reference Design Revision 2.0 "
" "
" An AMD PLCC-28 PAL26V12 provides the logic functions needed for the POTS interface. "
" Includes providing output enables for the DTMF’s, and the PCLK/MCLK clock "
" sync between the Am79C031 DSLAC and the Am79C32A when running in SBP/PCM "
" mode to fix "
" an anomaly with the DSLAC "
" "
" Written: Feb. 1999 "
" For : Advanced Micro Devices - Austin EPD "
" By : LDB - System Engineering "
" "
" Revision 00 02/98 Original Code "
" "
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" Declarations "
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INPUT /pcs4; "PIN 9 PCS4# used for DTMF output enable for channel
2 "
INPUT /pcs5; "PIN 8 PCS5# used for DTMF output enable for channel
1 "
I N P U T mc l k _ c3 2 ; "P I N 2 : A m 7 9C 3 2 A 1 2 . 28 8 M H z M C LK o u t p u t
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INPUT bc lk _c3 2; "PIN 3:Am79C32A BC LK output
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INPU T r e s o ut; "P I N 4: A m 186 C C A c tiv e H i gh R ese t o u tpu t
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I N P U T p c l k _c 3 2 ; " P I N 5 : C L K A o u t p u t f r om t h e A m 7 9 C32 A
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about.book Page 7 Wednesday, July 21, 1999 11:10 AM