Maxim Integrated High-Speed Microcontroller - Manual (Page 128)

High-Speed Microcontroller User’s Guide
Rev: 062210 128 of 176
Figure 11-5. Timer/Counter 2 Auto-Reload Mode
(a) DCEN = 0
OSC INPUT TO TIMER
CLK MODE
TIMER INPUT
DIVIDE-BY-4 OSC/1
PMM1
OSC/16
PMM2 OSC/256
DIVIDE
BY 12
DIVIDE
BY 4
T2 = P1.0
TR2 = T2CON.2
EXEN2 = T2CON.3
EXF2 =
T2CON.6
TIMER 2
INTERRUPT
0
1
0
1
T2M = CKCON.5
TL2
0 7
TH2
8 15
TF2 =
T2CON.7
0 7 8 15
RCAP2L RCAP2H
T2EX = P1.1
C/ T2 = T2CON.1
CLK
OSC INPUT TO TIMER
CLK MODE
TIMER INPUT
DIVIDE-BY-4 OSC/1
PMM1
OSC/16
PMM2 OSC/256
DIVIDE
BY 12
DIVIDE
BY 4
T2 = P1.0
TR2 = T2CON.2
0
1
0
1
T2M = CKCON.5
RCAP2L RCAP2H
(b) DCEN = 1
0FFH 0FFH
0 7 8 15
TL2 TH2
(DOWN COUNTING RELOAD VALUE)
0 7 8 15
T2EX = P1.1
(UP COUNTING RELOAD VALUE)
TF2 =
T2CON.7
TIMER 2
INTERRUPT
EXF2 =
T2CON.6
COUNT DIRECTION
(1 = UP, 0 = DOWN)
C/ T2 = T2CON.1
CLK