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Copy pathACIA_BaudRate_Generator.bdf
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ACIA_BaudRate_Generator.bdf
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/*
WARNING: Do NOT edit the input and output ports in this file in a text
editor if you plan to continue editing the block that represents it in
the Block Editor! File corruption is VERY likely to occur.
*/
/*
Copyright (C) 1991-2013 Altera Corporation
Your use of Altera Corporation's design tools, logic functions
and other software and tools, and its AMPP partner logic
functions, and any output files from any of the foregoing
(including device programming or simulation files), and any
associated documentation or information are expressly subject
to the terms and conditions of the Altera Program License
Subscription Agreement, Altera MegaCore Function License
Agreement, or other applicable license agreement, including,
without limitation, that your use is for the sole purpose of
programming logic devices manufactured by Altera and sold by
Altera or its authorized distributors. Please refer to the
applicable agreement for further details.
*/
(header "graphic" (version "1.4"))
(pin
(input)
(rect 320 304 488 320)
(text "INPUT" (rect 133 0 161 10)(font "Arial" (font_size 6)))
(text "Clk" (rect 9 0 25 12)(font "Arial" ))
(pt 168 8)
(drawing
(line (pt 92 12)(pt 117 12))
(line (pt 92 4)(pt 117 4))
(line (pt 121 8)(pt 168 8))
(line (pt 92 12)(pt 92 4))
(line (pt 117 4)(pt 121 8))
(line (pt 117 12)(pt 121 8))
)
(text "VCC" (rect 136 7 156 17)(font "Arial" (font_size 6)))
)
(pin
(input)
(rect 312 224 480 240)
(text "INPUT" (rect 133 0 161 10)(font "Arial" (font_size 6)))
(text "Clk_50Mhz" (rect 9 0 62 12)(font "Arial" ))
(pt 168 8)
(drawing
(line (pt 92 12)(pt 117 12))
(line (pt 92 4)(pt 117 4))
(line (pt 121 8)(pt 168 8))
(line (pt 92 12)(pt 92 4))
(line (pt 117 4)(pt 121 8))
(line (pt 117 12)(pt 121 8))
)
(text "VCC" (rect 136 7 156 17)(font "Arial" (font_size 6)))
)
(pin
(input)
(rect 320 320 488 336)
(text "INPUT" (rect 133 0 161 10)(font "Arial" (font_size 6)))
(text "Reset_L" (rect 9 0 50 12)(font "Arial" ))
(pt 168 8)
(drawing
(line (pt 92 12)(pt 117 12))
(line (pt 92 4)(pt 117 4))
(line (pt 121 8)(pt 168 8))
(line (pt 92 12)(pt 92 4))
(line (pt 117 4)(pt 121 8))
(line (pt 117 12)(pt 121 8))
)
(text "VCC" (rect 136 7 156 17)(font "Arial" (font_size 6)))
)
(pin
(input)
(rect 320 288 488 304)
(text "INPUT" (rect 133 0 161 10)(font "Arial" (font_size 6)))
(text "Enable_H" (rect 9 0 56 12)(font "Arial" ))
(pt 168 8)
(drawing
(line (pt 92 12)(pt 117 12))
(line (pt 92 4)(pt 117 4))
(line (pt 121 8)(pt 168 8))
(line (pt 92 12)(pt 92 4))
(line (pt 117 4)(pt 121 8))
(line (pt 117 12)(pt 121 8))
)
(text "VCC" (rect 136 7 156 17)(font "Arial" (font_size 6)))
)
(pin
(input)
(rect 320 272 488 288)
(text "INPUT" (rect 133 0 161 10)(font "Arial" (font_size 6)))
(text "DataIn[2..0]" (rect 5 0 64 12)(font "Arial" ))
(pt 168 8)
(drawing
(line (pt 92 12)(pt 117 12))
(line (pt 92 4)(pt 117 4))
(line (pt 121 8)(pt 168 8))
(line (pt 92 12)(pt 92 4))
(line (pt 117 4)(pt 121 8))
(line (pt 117 12)(pt 121 8))
)
(text "VCC" (rect 136 7 156 17)(font "Arial" (font_size 6)))
)
(pin
(output)
(rect 1080 224 1256 240)
(text "OUTPUT" (rect 1 0 39 10)(font "Arial" (font_size 6)))
(text "ACIA_Clock" (rect 90 0 150 12)(font "Arial" ))
(pt 0 8)
(drawing
(line (pt 0 8)(pt 52 8))
(line (pt 52 4)(pt 78 4))
(line (pt 52 12)(pt 78 12))
(line (pt 52 12)(pt 52 4))
(line (pt 78 4)(pt 82 8))
(line (pt 82 8)(pt 78 12))
(line (pt 78 12)(pt 82 8))
)
)
(symbol
(rect 792 200 1024 280)
(text "ACIA_Clock" (rect 5 0 65 12)(font "Arial" ))
(text "inst" (rect 8 64 25 76)(font "Arial" ))
(port
(pt 0 32)
(input)
(text "Clk" (rect 0 0 16 12)(font "Arial" ))
(text "Clk" (rect 21 27 37 39)(font "Arial" ))
(line (pt 0 32)(pt 16 32))
)
(port
(pt 0 48)
(input)
(text "BaudRateSelect[2..0]" (rect 0 0 105 12)(font "Arial" ))
(text "BaudRateSelect[2..0]" (rect 21 43 126 55)(font "Arial" ))
(line (pt 0 48)(pt 16 48)(line_width 3))
)
(port
(pt 232 32)
(output)
(text "ACIA_Clk" (rect 0 0 48 12)(font "Arial" ))
(text "ACIA_Clk" (rect 171 27 219 39)(font "Arial" ))
(line (pt 232 32)(pt 216 32))
)
(drawing
(rectangle (rect 16 16 216 64))
)
)
(symbol
(rect 552 248 728 360)
(text "Register3Bit" (rect 5 0 65 12)(font "Arial" ))
(text "inst2" (rect 8 96 31 108)(font "Arial" ))
(port
(pt 0 32)
(input)
(text "DataIn[2..0]" (rect 0 0 59 12)(font "Arial" ))
(text "DataIn[2..0]" (rect 21 27 80 39)(font "Arial" ))
(line (pt 0 32)(pt 16 32)(line_width 3))
)
(port
(pt 0 48)
(input)
(text "Enable" (rect 0 0 33 12)(font "Arial" ))
(text "Enable" (rect 21 43 54 55)(font "Arial" ))
(line (pt 0 48)(pt 16 48))
)
(port
(pt 0 64)
(input)
(text "Clk" (rect 0 0 16 12)(font "Arial" ))
(text "Clk" (rect 21 59 37 71)(font "Arial" ))
(line (pt 0 64)(pt 16 64))
)
(port
(pt 0 80)
(input)
(text "Reset" (rect 0 0 29 12)(font "Arial" ))
(text "Reset" (rect 21 75 50 87)(font "Arial" ))
(line (pt 0 80)(pt 16 80))
)
(port
(pt 176 32)
(output)
(text "Q[2..0]" (rect 0 0 34 12)(font "Arial" ))
(text "Q[2..0]" (rect 127 27 161 39)(font "Arial" ))
(line (pt 176 32)(pt 160 32)(line_width 3))
)
(drawing
(rectangle (rect 16 16 160 96))
)
)
(connector
(pt 760 248)
(pt 792 248)
(bus)
)
(connector
(pt 760 248)
(pt 760 280)
(bus)
)
(connector
(pt 728 280)
(pt 760 280)
(bus)
)
(connector
(pt 552 280)
(pt 488 280)
(bus)
)
(connector
(pt 552 296)
(pt 488 296)
(bus)
)
(connector
(pt 552 312)
(pt 488 312)
(bus)
)
(connector
(pt 552 328)
(pt 488 328)
(bus)
)
(connector
(pt 1024 232)
(pt 1080 232)
(bus)
)
(connector
(pt 792 232)
(pt 480 232)
(bus)
)
(text "3 bit latch to store value used to set the baud rate" (rect 560 408 842 422)(font "Arial" (font_size 8)))
(text "000 = 230k baud" (rect 560 424 654 438)(font "Arial" (font_size 8)))
(text "001 = 115k baud" (rect 560 440 654 454)(font "Arial" (font_size 8)))
(text "010 = 57.6k baud" (rect 560 456 657 470)(font "Arial" (font_size 8)))
(text "011 = 38.4k baud" (rect 560 472 657 486)(font "Arial" (font_size 8)))
(text "100 = 19.2k baud" (rect 560 488 657 502)(font "Arial" (font_size 8)))
(text "all other values = 9600 baud" (rect 560 504 720 518)(font "Arial" (font_size 8)))
(text "This baud rate generator provides a \"x16\" clock for a 6850 acia chip. It derives its timing from a 50Mhz clock" (rect 752 360 1365 374)(font "Arial" (font_size 8)))
(text "After reset, it is cleared to \"000\" i.e. 230k baud so you should program it in software as part of your initialisation" (rect 560 528 1194 542)(font "Arial" (font_size 8)))
(text "Connect clock to transmit and receive clock inputs on the 6850" (rect 1032 304 1387 318)(font "Arial" (font_size 8)))
(text "Enabled by address decoder" (rect 560 544 724 558)(font "Arial" (font_size 8)))