TMP88CU74F datasheet(71/132 Pages) TOSHIBA

71 / 132 page

TMP88CU74

2003-02-17

88CU74-71

2.7.3

Function

The timer/counter 2 has three operating modes: timer, event counter and window modes.

Also timer/counter 2 is used for warm-up when switching from SLOW mode to NORMAL2

mode.

(1) Timer mode

In this mode, the internal clock is used for counting up. The contents of TREG2 are

compared with the contents of up-counter. If a match is found, a timer/counter 2

interrupt (INTTC2) is generated, and the counter is cleared. Counting up is resumed

after the counter is cleared.

Also, when “fcgck” is selected as the source clock during SLOW mode, the lower 11

bits of TREG2 are ignored and an INTTC2 interrupt is generated by matching the

upper 5 bits. Thus, in this case, only the TREG2H setting is necessary.

Table 2.7.1 Source Clock (Internal clock) for Timer/Counter 2 (at fc

= 12.5 MHz, fs = 32.8 kHz)

NORMAL1/2, IDLE1/2 Mode

DV7CK

= 0

DV7CK

= 1

DV1CK

= 0

DV1CK

= 1

DV1CK

= 0

DV1CK

= 1

TC2CK

Resolution

Maximum

Time Setting

Resolution

Maximum

Time Setting

Resolution

Maximum

Time Setting

Resolution

Maximum

Time Setting

000

001

010

011

100

101

671

655.36

μs

20.48

μs

0.64

μs

−

30.5

μs

12.2 h

43.0 s

1.34 s

41.92 ms

−

1.34 s

1.31 ms

40.96

μs

1.28

μs

−

30.5

μs

24.4 h

1.4 min

2.7 s

83.8 ms

−

0.98 ms

μs

0.5

μs

−

30.5

μs

18.2

1.07 min

1.05 s

32.75 ms

−

0.98 ms

μs

−

30.5

μs

18.2 h

1.07 min

2.1 s

65.5 ms

−

SLOW Mode

SLEEP Mode

TC2CK

Resolution [s]

Maximum

Time Setting

Resolution [s]

Maximum

Time Setting

000

001

100

110

101

0.98 ms

−

125

ns (Note)

160

ns (Note)

−

18.2

1.07 min

−

0.98 ms

−

18.2

1.07 min

−

Note:

fc and fc/2 can be used only in the timer mode. It is used for warm-up when switching from SLOW

mode to NORMAL2 mode. (at fc

= 8 MHz, TC2CK = <100>)

Example: Sets the timer mode with source clock fc/2

4 [Hz] and generates an interrupt every 25 ms

(at fc = 12.5 MHz, DV1CK = 1).

LDW

(TREG2), 4C46H

;

Sets TREG2 (25 ms

÷ 2

4/fc = 4C46H)

SET

(EIRH). EF14

;

Enables INTTC2 interrupt

(TC2CR), 00101100B

;

Starts TC2

2007-10-19

TMP88CU74F bảng dữ liệu(PDF) 71 Page - Toshiba Semiconductor

TMP88CU74F bảng dữ liệu(HTML) 71 Page - Toshiba Semiconductor

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 99 100 ...More

bảng dữ liệu tải về

Link URL