ZLP32300 datasheet(41/99 Pages) ZILOG

41 / 99 page

Crimzon® ZLP32300

Product Specification

PS020823-0208

Functional Description

Using the same instructions for stopping the counter/timers and setting the status bits is

not recommended.

Two successive commands are necessary. First, the counter/timers must be stopped. Sec-

ond, the status bits must be reset. These commands are required because it takes one

counter/timer clock interval for the initiated event to actually occur, see Figure 19 and

Figure 20.

Figure 19. T8_OUT in SINGLE-PASS Mode

Figure 20. T8_OUT in MODULO-N Mode

T8 DEMODULATION Mode

You must program TC8L and TC8H to FFh. After T8 is enabled, when the first edge (ris-

ing, falling, or both depending on CTR1, D5; D4) is detected, it starts to count down.

When a subsequent edge (rising, falling, or both depending on CTR1, D5; D4) is detected

during counting, the current value of T8 is complemented and put into one of the capture

registers. If it is a positive edge, data is put into LO8; if it is a negative edge, data is put

into HI8. From that point, one of the edge detect status bits (CTR1, D1; D0) is set, and an

interrupt can be generated if enabled (CTR0, D2). Meanwhile, T8 is loaded with FFh and

starts counting again. If T8 reaches 0, the time-out status bit (CTR0, D5) is set, and an

Caution:

TC8H

Counts

Counter Enable Command;

T8_OUT Switches to Its

Initial Value (CTR1 D1)

T8_OUT Toggles;

Timeout Interrupt

Counter Enable Command;

T8_OUT Switches to Its

Initial Value (CTR1 D1)

Timeout

Interrupt

Timeout

Interrupt

T8_OUT

T8_OUT Toggles

TC8L

TC8H

TC8L

.. .

ZLP32300 Datasheet(PDF) 41 Page - Zilog, Inc.

ZLP32300 Datasheet(HTML) 41 Page - Zilog, Inc.

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 98 99

Datasheet Download

Link URL