타이머 / 카운트 정리

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Timer 1( 1/12) Counter Using/ 0 SFR TH0,TL0/ 1 SFR TH1,TL1 , +1 (up counter)0. / [1]

0. / [2] /

() XTAL

0. / [3]If) Timer Register Overfloow(0xFFFF->0x0000)Than TCON Register TF Flag : Set 1Timer 0 -> TF0, Timer 1 -> TF1

1 Baud rate generator

TMOD TCON

0. / [4] XTALoscillator 12TR0(TCON)INT0 (P3.2)C/T = 0GATE(TMOD)T0 (P3.4) C/T = 1

0. / [5] XTALoscillator 12TR0(TCON)INT0 (P3.2)C/T = 0GATE(TMOD)T0 (P3.4) C/T = 111=1011

0. / [6] XTALoscillator 12TR0(TCON)INT0 (P3.2)C/T = 0T0 (P3.4) C/T = 111=101

1. / 0,1 [1]12M HZ(11.0592Mhz) 1us ec .24M HZ 500n sec .8bit / 256u sec .16bit timer/count 65m sec .8051 timer/count 0, 1 timer/count 3 .8051 timer/count 0, 1 timer/count 2 USART , . 1000 = 1Time ( = 12MHZ) : 10 = 10usec, 100 = 100usec, 255 = 255usec, 1000 = 1ms, 5000 = 5msec, 10000 = 10msec, 30000 = 30msec, 60000 = 60msec, 65000 = 65msecTime : 8bit = 256 xxx( ) = 2 = 256usec ex)8bit 50usec : 256-50 = 206 hex THx . = 0xce

1. / 0,1 [2]16bit = 65536 xxxx( ) 1 16bit timer/count 65m sec ex) 50m sec timer/count : t= 65536-50000 = 15536 hex THx TLx . = 0x3cb0 == THx = 0x3c; TLx = 0xb0;

timer/ count timer t0, t1 pin count .

Tmod gate bit 1 timer/count pin . t0 int0 pin tr0 bit and t1 int1 pin tr1 bit and . . ex) , , ir data .

/ 1 2 .

1. / 0,1 [3]

/ 0, 1 (/ 0 1 ) 013 / 116 / 2 (auto-reload) 8 / 3(0,1 )2 8 / / 0 / 1

M1M0Operating Mode00 013-bit timer/count01 116-bit timer/count10 28-bit Auto-reload timer/count11 3 (T/C 0) 8bit timer/count th0, tl011 3 (T/C 1)

1. / 0,1 [4]/

1. / 0,1 [5] / 0

1. / 0,1 [6] / 1

1. / 0,1 [7] / 2

1. / 0,1 [8] / 3

2. / 2 [1] OUT

2. / 2 [2]

2. / 2 [3]16bit

2. / 2 [4]16bit

3. / [1]TMOD reg [1]

3. / [2]TMOD reg [2]

/ 0, 1 (/ 0 1 ) 013 / 116 / 2 (auto-reload) 8 / 3(0,1 )2 8 / / 0 / 1

M1M0Operating Mode00 013-bit timer/count01 116-bit timer/count10 28-bit Auto-reload timer/count11 3 (T/C 0) 8bit timer/count th0, tl011 3 (T/C 1)

3. / [3]TCON reg

3. / [4]T2MOD reg

3. / [5]T2CON reg

3. / [6]SFR