F224d Faria, Rubens Alexandre de Desenvolvimento de ... - UTFPR

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AAM 11 Timer 0 and 1 Timer 0 and Timer 1 in the AT89C52 operate the same way as Timer 0 and Timer 1 in the AT89C51. Timer 2 Timer 2 is a 16-bit Timer/Counter that can operate as either a timer or an event counter. The type of operation is selected by bit C/T2 in the SFR T2CON (shown in Table 2). Timer 2 has three operating modes: capture, auto-reload (up or down counting), and baud rate generator. The modes are selected by bits in T2CON, as shown in Table 3. Timer 2 consists of two 8-bit registers, TH2 and TL2. In the Timer function, the TL2 register is incremented every machine cycle. Since a machine cycle consists of 12 oscillator periods, the count rate is 1/12 of the oscillator frequency. le 3. Timer 2 Operating Modes RCLK +TCLK CP/RL2 TR2 MODE 0 0 1 16-Bit Auto-Reload 0 1 1 16-Bit Capture 1 X 1 Baud Rate Generator X X 0 (Off) In the Counter function, the register is incremented in response to a 1-to-0 transition at its corresponding external input pin, T2. In this function, the external input is sampled during S5P2 of every machine cycle. When the samples show a high in one cycle and a low in the next cycle, the count is incremented. The new count value appears in the register during S3P1 of the cycle following the one in which the transition was detected. Since two machine cycles (24 oscillator periods) are required to recognize a 1-to-0 transition, the maximum count rate is 1/24 of the oscillator frequency. To ensure that a given level is sampled at least once before it changes, the level should be held for at least one full machine cycle. Capture Mode In the capture mode, two options are selected by bit EXEN2 in T2CON. If EXEN2 = 0, Timer 2 is a 16-bit timer or counter which upon overflow sets bit TF2 in T2CON. This bit can then be used to generate an interrupt. If EXEN2 = 1, Timer 2 performs the same operation, but a 1- to-0 transition at external input T2EX also causes the current value in TH2 and TL2 to be captured into RCAP2H and RCAP2L, respectively. In addition, the transition at T2EX causes bit EXF2 in T2CON to be set. The EXF2 bit, like TF2, can generate an interrupt. The capture mode is illustrated in Figure 1. Auto-Reload (Up or Down Counter) Timer 2 can be programmed to count up or down when configured in its 16-bit auto-reload mode. This feature is invoked by the DCEN (Down Counter Enable) bit located in the SFR T2MOD (see Table 4). Upon reset, the DCEN bit is set to 0 so that timer 2 will default to count up. When DCEN is set, Timer 2 can count up or down, depending on the value of the T2EX pin. Figure 1. Timer in Capture Mode OSC + 12 C/T2 = 0 0 -r0 TH2 TL TF2 C/T2 = 1 CONTROL TR2 OVERFLOW T2 PIN TRANSITION DETECTOR CAPTURE RCAP2H RCAP2L • TIMER 2 INTERRUPT T2EX PIN I 1 EXF2 CONTROL EXEN2 4-66 AT89C52
106 ANEXO VI CARACTERISTICAS TECNICAS DO SENSOR DE TEMPERATURA DS1624S DA EMPRESA DALLAS SEMICONDUCTORS
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F224d Faria, Rubens Alexandre de De
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7. COMPONENTE: TITULAcA0(siGLA): IN
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CADASTRO DE PROFESSOR DE OUTRA INST
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TESES / INFORMAQOES AREA DE CONHECI
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RUBENS ALEXANDRE DE FARIA DESENVOLV
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E finalmente o espaco reservado aos
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2.12 INFLUENIA DE OUTROS FATORES Fi
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ANEXO IV DIAGRAMAS ESQUEMATICOS 95
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Figura 3 Desenho de uma incubadora
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LISTA DE TABELAS Tabela 1 Temperatu
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ABSTRACT In this work it is describ
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2 em modificar as condicoes ambient
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4 Neste capitulo foram apresentados
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6 A incubadora dotada de controle a
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8 penla de calor perda (le calor se
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10 coeficiente varia de acordo corn
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12 2.7.1 HIPERTERMIA A hipertermia
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14 A medida adquirida no sensor de
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16 incubadora para que a potencia s
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18 parede do equipamento. Desse mod
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20 Tabela 1 - Temperatura da incuba
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22 de 80 dB (FANAROFF & KLAUS, 1995
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CAPITULO 3 A CERTIFICAcAO DO EQUIPA
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26 Segundo o INMETRO (Instituto Nac
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28 10/03/1998. 0 OCP deve assegurar
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30 A rede eletrica de 127 ou 220 V
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32 0 modo de controle termico da in
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34 sonoro. A indicacao visual deve
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36 A norma NBR IEC 601-2-19 equipam
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38 tipos de reuniao, confeccionando
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40 ALTMENTACAO GERADOR RESET BARRAM
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42 0 diagrama esquematico correspon
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44 a escala atraves de potenciometr
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46 Urn byte de controle e o primeir
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48 0 maior problema dos sensores qu
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50 A saida do sensor HC600 fornece
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52 4.3.4.2 DISPLAY DE CRISTAL LIQUI
Page 75 and 76: 54 4.3.4.3 CONTROLE DE TEMPERATURA
Page 77 and 78: 56 CONSTMAIS: DB 00H,10H,F2H,DOH DB
Page 79 and 80: 58 (a) 4-+ 5mskliv 2V1div (b) 5ms/d
Page 81 and 82: 60 4.3.5 ALARMES E ATUADORES 4.3.5.
Page 83 and 84: 62 ar, pelo menos 3 minutos ap6s o
Page 85 and 86: 64 esta tarefa pois cada temperatur
Page 87 and 88: 66 0 tempo para aquecer a incubador
Page 89 and 90: 68 ma tambem esta entre os sensores
Page 91 and 92: 70 almente e seria especifico para
Page 93 and 94: CAPITULO 6 DISCUSSAO GERAL E CONCLU
Page 95 and 96: 74 Um problema que deve ser resolvi
Page 97 and 98: 76 ANEXO I LABORATORIOS CREDENCIADO
Page 99 and 100: 78 ANEXO II TOPICOS DA NORMA TECNIC
Page 101 and 102: 80 Temperatura de Controle: Tempera
Page 103 and 104: 82 IDENTIFICAcAO, MARCACAO E DOCUME
Page 105 and 106: 84 SEcA0 SETE - PROTE00 CONTRA TEMP
Page 107 and 108: 86 SEcA0 OITO - EXATIDAO NOS DADOS
Page 109 and 110: 88 tensao nominal e o equipamento o
Page 111 and 112: 90 - Onde urn movimento relativo de
Page 113 and 114: 92 - Na utilizacao normal, a veloci
Page 115 and 116: 94 CRONOGRAMA DE ATIVIDADES PARA 0
Page 117 and 118: W gEtq 1 w f 2 8 g .11 IF 2 0 CO MU
Page 119 and 120: ID —• 0) 1° 1• O C 03 LI N.)
Page 121 and 122: Features • Compatible with MCS-51
Page 123 and 124: AT89C52 The AT89C52 provides the fo
Page 125: AT89C52 Special Function Registers
Page 129 and 130: 108 tura é efetuada em 13 bits de
Page 131 and 132: 110 ANEXO VII CARACTERISTICAS TECNI
Page 133 and 134: 112 Tabela VII.II - Valores maximos
Page 135 and 136: 114 ANEXO VIII FOTOS DAS PLATAFORMA
Page 137 and 138: 116 Figura VIII.III - Hardware fina
Page 139 and 140: 118 Figura VIII.VII - Incubadora em
Page 141 and 142: 120 REFERENCIAS BIBLIOGRAFICAS 1. A
Page 143: 122 21. SEGRE, C. A. M. RN (Recem -
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F224d Faria, Rubens Alexandre de Desenvolvimento de ... - UTFPR

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