SN8P2613 datasheet(79/102 Pages) SONIX

79 / 102 page

SN8P2610 Series

8-Bit Micro-Controller

SONiX TECHNOLOGY CO., LTD

Page 79

Version 1.3

8.3.4 TC0R AUTO-LOAD REGISTER

TC0 timer is with auto-load function controlled by ALOAD0 bit of TC0M. When TC0C overflow occurring, TC0R value

will load to TC0C by system. It is easy to generate an accurate time, and users don’t reset TC0C during interrupt

service routine.

TC0 is double buffer design. If new TC0R value is set by program, the new value is stored in 1

st buffer. Until TC0

overflow occurs, the new value moves to real TC0R buffer. This way can avoid TC0 interval time error and glitch in

PWM and Buzzer output.

Note: Under PWM mode, auto-load is enabled automatically. The ALOAD0 bit is selecting overflow

boundary.

0CDH

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

TC0R

TC0R7

TC0R6

TC0R5

TC0R4

TC0R3

TC0R2

TC0R1

TC0R0

Read/Write

After reset

The equation of TC0R initial value is as following.

TC0R initial value = N - (TC0 interrupt interval time * input clock)

N is TC0 overflow boundary number. TC0 timer overflow time has six types (TC0 timer, TC0 event counter, TC0 Fcpu

clock source, TC0 Fosc clock source, PWM mode and no PWM mode). These parameters decide TC0 overflow time

and valid value as follow table.

TC0CKS PWM0 ALOAD0 TC0OUT

TC0R valid

value

TC0R value

binary type

256

0x00~0xFF

00000000b~11111111b

256

0x00~0xFF

00000000b~11111111b

0x00~0x3F

xx000000b~xx111111b

0x00~0x1F

xxx00000b~xxx11111b

0x00~0x0F

xxxx0000b~xxxx1111b

256

0x00~0xFF

00000000b~11111111b

Example: To set 10ms interval time for TC0 interrupt. TC0 clock source is Fcpu (TC0KS=0) and no PWM

output (PWM0=0). High clock is external 4MHz. Fcpu=Fosc/4. Select TC0RATE=010 (Fcpu/64).

TC0R initial value = N - (TC0 interrupt interval time * input clock)

= 256 - (10ms * 4MHz / 4 / 64)

= 256 - (10-2 * 4 * 106 / 4 / 64)

= 100

= 64H

SN8P2613 Datasheet(PDF) 79 Page - SONiX Technology Company

SN8P2613 Datasheet(HTML) 79 Page - SONiX Technology Company

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