Plan war es drei 4021 und einen 4094 parallel zu schalten (4 Datenleitungen). An zwei 4021 sollten ADC0804 (8-Bit A/D-Wandler) geschaltet werden, während der dritte für digitale Eingänge zur Verfügung stehen sollte. Sicher, es gibt auch serielle A/D-Wandler, aber ich möchte mir die Möglichkeit offenhalten
ADC0804 wobei ich mir grad nicht sicher bin ob der ne Samplerate von 100 kHz macht (ins Datenblatt darfste selbst schaun). Ist ein paralleler 8bit ADC.
0 in 9 8 out 0 5 k in 0 IOREQ 9 out 0 0 R d 4 1uf VI- in 5 6 5501 p 1pe 0 p p 7414N 7414N aS p s ADC0804 7 out 0 s +C2 s 7 GND 74138N GND 0 GND a p GND IC1A in 13 12 out 0 7414N E E IC1F in 05 6 out 0 p 7414N s z80_minimal GND nicht gespeichert! Sheet: 1/1 1 2 3 4 5 6 7 8 21.09.2014 13:25:07 K:\Elektronik
0 5 10 out 0 +C1 in 4 1 5 k in 0 9 out 0 sup 0 pr R r 4 VI- IOREQ 6 Si ie 1uf p in 5 k 0 aS a s ADC0804 7 out 0 S1 VCC . 1 u p 7 2 R s pas 2 2 GND 74138N pas 1 e IC1B IC1C pas 1 paspa2s 1 pas 1Siin11 10 out 0 in 9 8 out 0 GND SpiceOrdeSpiceOpder 2 5501 s 0 p 7414N 7414N u +C2 s GND 0 u p GND E E IC1D
in 9 8 out 0 5 k in 0 9 out 0 p GND R r 4 VI- IOREQ 6 5501 a ie 1uf p in 5 p p 7414N 7414N aS a s ADC0804 7 out 0 s +C2 u p 7 s GND 74138N GND 0 s GND p GND E E z80_minimal 17.09.2014 19:36:23 Sheet: 1/1 1 2 3 4 5 6 7 8 17.09.2014 19:36:29 K:\Elektronik\Z80\eagle\z80_minimal.sch (Sheet: 1/1)
_ in 5 6 in17 6D 6Q 16hizp0as 113 paspa13g0 DP7 pas 0 1 0 u N D6 7D 7Q R8k2 74HCT14a VCC p p p s ADC0804 I 7 7 CS7 0 D7 in18 8D 8Q 19hizp0as R15 pas 1 LA-401AD p sup 0 S1 s 74HCT14 s R16 k 0 pas 2 GND in 1 . 1 pas 1 GND GND 74HCT138 in11 OC 2 R D supa0s 1 pas 2 CLK N u 1 G 5501 s 74HCT374N s 1k2 74HCT14
SpiceOrder 1 3 g DP 7 pas 0 74HCT14 1 VCC sS s s 7 out 0 in 018 7D 7Q 19 hizp0as 1 R8k2 pas 1 p sup 0 p p ADC0804 7 D7 8D 8Q SpiceOrderR15 SpiceOrder 1 LA-401AD p S1 74HCT14 s k S 0 pas 2 in 0 1 R16 . 1 pas 1 GND 74HCT138 OC 2 R 74HCT14F GND in 011 D supa0s 1 pas 2 CLK d N in 0 5 6 out 0 p p G 5501 s 74HCT374N
12 out 0 1 0 100n p _ in 5 D6 in17 7D 7Q 16 hizp0as 8k2 paspa13 g DP7 pas 0 74HCT14 s VCC a a s ADC0804 T 7 out 0 D7 in18 19 hizp0as 1 pas 1 p sup 0 S1 s p N 7 8D 8Q R15 LA-401AD k pas 2 74HCT14 I R16 2 1 GND 74HCT138 in 1 OC 2 R pas 1 74HCT14F GND in11 D supa0s 1 pas 2 in 5 6 out 0 CLK N u 1 G 5501
12 out 0 1 0 100n p _ in 5 D6 in17 7D 7Q 16 hizp0as 8k2 paspa13 g DP7 pas 0 74HCT14 s VCC a a s ADC0804 T 7 out 0 D7 in18 19 hizp0as 1 pas 1 p sup 0 S1 s p N 7 8D 8Q R15 LA-401AD k pas 2 74HCT14 I R16 2 1 GND 74HCT138 in 1 OC 2 R pas 1 74HCT14F GND in11 D supa0s 1 pas 2 in 5 6 out 0 CLK N u 1 G 5501
12 out 0 1 0 100n p _ in 5 D6 in17 7D 7Q 16 hizp0as 8k2 paspa13 g DP7 pas 0 74HCT14 s VCC a a s ADC0804 T 7 out 0 D7 in18 19 hizp0as 1 pas 1 p sup 0 S1 s p N 7 8D 8Q R15 LA-401AD k pas 2 74HCT14 I R16 2 1 GND 74HCT138 in 1 OC 2 R pas 1 74HCT14F GND in11 D supa0s 1 pas 2 in 5 6 out 0 CLK N u 1 G 5501
in 5 6 in17 6D 6Q 16 hizp0as 113 paspa13 g DP7 pas 0 1 0 u N D6 7D 7Q 8k2 74HCT14 a VCC p p p s ADC0804 I 7 7CS7t 0 D7 in18 8D 8Q 19 hizp0as R15 pas 1 LA-401AD p sup 0 S1 s 74HCT14 s R16 k 0 pas 2 GND in 1 . 1 pas 1 GND GND 74HCT138 in 11 OC 2 R D supa0s 1 pas 2 CLK N u 1 G 5501 s 74HCT374N s 1k2 74HCT14
in 5 6 in17 6D 6Q 16 hizp0as 113 paspa13 g DP7 pas 0 1 0 u N D6 7D 7Q 8k2 74HCT14 a VCC p p p s ADC0804 I 7 7CS7t 0 D7 in18 8D 8Q 19 hizp0as R15 pas 1 LA-401AD p sup 0 S1 s 74HCT14 s R16 k 0 pas 2 GND in 1 . 1 pas 1 GND GND 74HCT138 in 11 OC 2 R D supa0s 1 pas 2 CLK N u 1 G 5501 s 74HCT374N s 1k2 74HCT14
in 5 6 in17 6D 6Q 16 hizp0as 113 paspa13 g DP7 pas 0 1 0 u N D6 7D 7Q 8k2 74HCT14 a VCC p p p s ADC0804 I 7 7CS7t 0 D7 in18 8D 8Q 19 hizp0as R15 pas 1 LA-401AD p sup 0 S1 s 74HCT14 s R16 k 0 pas 2 GND in 1 . 1 pas 1 GND GND 74HCT138 in 11 OC 2 R D supa0s 1 pas 2 CLK N u 1 G 5501 s 74HCT374N s 1k2 74HCT14
ADC0803/4 UNIT Min Typ Max ADC0803 relative accuracy error (adjusted) Full-Scale adjusted 0.50 LSB ADC0804 relative accuracy error (unadjusted) VREF/2 = 2.500DC 1 LSB 3 2 RIN V REF/2 input resistance VCC = 0V 400 680 3 Analog input voltage range –0.05 V CC+0.05 V Over analog input voltage DC common-mode
ADC0803/4 UNIT Min Typ Max ADC0803 relative accuracy error (adjusted) Full-Scale adjusted 0.50 LSB ADC0804 relative accuracy error (unadjusted) VREF/2 = 2.500DC 1 LSB 3 2 RIN V REF/2 input resistance VCC = 0V 400 680 3 Analog input voltage range –0.05 V CC+0.05 V Over analog input voltage DC common-mode
k PARALLEL LM35 OUT IN OUT IN 8 DATA REF ADC08031 SERIAL LM35 1.28 V DATA OUTPUT OUTPUT GND GND ADC0804 75 100k + 75 INTR 1 k VREF FB LM385 CLOCK + 0.64 V + ENABLE CS 1 2F 10 k + 2 k RD 1 2F GND WR GND Figure 24. Temperature to Digital Converter Figure 25. Temperature to Digital Converter (Serial Output
k PARALLEL LM35 OUT IN OUT IN 8 DATA REF ADC08031 SERIAL LM35 1.28 V DATA OUTPUT OUTPUT GND GND ADC0804 75 100k + 75 INTR 1 k VREF FB LM385 CLOCK + 0.64 V + ENABLE CS 1 2F 10 k + 2 k RD 1 2F GND WR GND Figure 24. Temperature to Digital Converter Figure 25. Temperature to Digital Converter (Serial Output
applications where you don't have a Microprocessor available. Such an example is if you want to connect a ADC0804 (Analog to Digital Converter) to the UART, or want to connect a LCD Display to the Serial Line. These common devices use a 8 bit parallel data bus. The CDP6402's Control Register is made up of Parity
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