7906 datasheet(116/531 Pages) RENESAS

116 / 531 page

TIMER A

7906 Group User’s Manual Rev.2.0

7-13

7.3.1 Setting for timer mode

Figure 7.3.2 shows an initial setting example for registers related to the timer mode.

Note that when using interrupts, set up to enable the interrupts. For details, refer to section “CHAPTER

6. INTERRUPTS.”

7.3 Timer mode

Fig. 7.3.2 Initial setting example for registers relevant to timer mode

Note: Counter divides the count source frequency by (n + 1).

Pulse output function select bit (Note)

0 : No pulse output

1 : Pulses output

Selecting timer mode and each function

Timer Ai mode register (i = 0 to 4) (Addresses 5616 to 5A16)

(i = 5 to 9) (Addresses D616 to DA16)

1 0 : Gate function (Counter counts only while TAjIN pin’s input signal level is “L.”)

1 1 : Gate function (Counter counts only while TAjIN pin’s input signal level is “H.”)

b4 b3

Selection of timer mode

Setting division ratio

Can be set to “000016” to “FFFF16” (n).

(b15)

(b8)

Timer A0 register (Addresses 4716, 4616)

Timer A1 register (Addresses 4916, 4816)

Timer A2 register (Addresses 4B16, 4A16)

Timer A3 register (Addresses 4D16, 4C16)

Timer A4 register (Addresses 4F16, 4E16)

Timer A5 register (Addresses C716, C616)

Timer A6 register (Addresses C916, C816)

Timer A7 register (Addresses CB16, CA16)

Timer A8 register (Addresses CD16, CC16)

Timer A9 register (Addresses CF16, CE16)

Gate function select bits (Note)

Count source select bits

See Table 7.2.3.

No Gate function

Count starts.

Setting count start bit to “1.”

Count start register 0 (Address 4016)

Timer A0 count start bit

Timer A1 count start bit

Timer A2 count start bit

Timer A3 count start bit

Timer A4 count start bit

Setting interrupt priority level

Timer Ai interrupt control register

(i = 0 to 4) (Addresses 7516 to 7916)

(i = 5 to 9) (Addresses F516 to F916)

Interrupt priority level select bits

When using interrupts, set these bits to one of

levels 1 to 7.

When disabling interrupts, set these bits to

level 0.

Setting port P6 and port P2 direction registers

Port P6 direction register (Address 1016)

Pin TA0IN

Pin TA1IN

When gate function is selected, clear the bit corresponding to the TAjIN

pin to “0.”

Note: In timers A3, A5 to A8, do not set the above registers.

Port P2 direction register (Address 816)

Pin TA4IN

Pin TA2IN

Pin TA9IN

Note: Valid only in timer Aj (j = 0 to 2, 4, 9).

Invalid in timer Ak (k = 3, 5 to 8); therefore, fix each of these bits to “0.”

Count start register 1 (Address 4116)

Timer A5 count start bit

Timer A6 count start bit

Timer A7 count start bit

Timer A8 count start bit

Timer A9 count start bit

0 0 :

0 1 :

7906 Datasheet(PDF) 116 Page - Renesas Technology Corp

7906 Datasheet(HTML) 116 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 98 99 100 ...More

Datasheet Download

Link URL