4513 datasheet(43/97 Pages) RENESAS

43 / 97 page

4513/4514 Group

SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER

MITSUBISHI MICROCOMPUTERS

Fig. 28 Setting registers

✕✕

(Bit 3)

(Bit 0)

A-D control register Q2

AIN4 function selected

A-D conversion mode

A-D control register Q1

AIN4 pin selected

100

(Bit 3)

(Bit 0)

✕ : Set an arbitrary value

(8) A-D conversion timing chart

Figure 27 shows the A-D conversion timing chart.

Fig. 27 A-D conversion timing chart

(9) How to use A-D conversion

How to use A-D conversion is explained using as example in which

the analog input from P40/AIN4 pin is A-D converted, and the high-

order 4 bits of the converted data are stored in address M(Z, X, Y)

= (0, 0, 0), the middle-order 4 bits in address M(Z, X, Y) = (0, 0, 1),

and the low-order 2 bits in address M(Z, X, Y) = (0, 0, 2) of RAM.

The A-D interrupt is not used in this example.

➀ After selecting the AIN4 pin function with the bit 0 of the register

Q2, select AIN4 pin and A-D conversion mode with the register

Q1 (refer to Figure 28).

➁ Execute the ADST instruction and start A-D conversion.

➂ Examine the state of ADF flag with the SNZAD instruction to de-

termine the end of A-D conversion.

➃ Transfer the low-order 2 bits of converted data to the high-order

2 bits of register A (TALA instruction).

➄ Transfer the contents of register A to M (Z, X, Y) = (0, 0, 2).

➅ Transfer the high-order 8 bits of converted data to registers A

and B (TABAD instruction).

➆ Transfer the contents of register A to M (Z, X, Y) = (0, 0, 1).

➇ Transfer the contents of register B to register A, and then, store

into M(Z, X, Y) = (0, 0, 0).

ADST instruction

A-D conversion

completion flag (ADF)

62 machine cycles

DAC operation signal

4513 датащи(PDF) 43 Page - Renesas Technology Corp

4513 датащи(HTML) 43 Page - Renesas Technology Corp

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97

датащи скачать

ссылки URL