W77E532_07 Datasheet, PDF (52/86 Pages) Winbond – 8-BIT MICROCONTROLLER

W77E532/W77E532A
Clock Source
Mode input
div. by 4 osc/1
div. by 64 osc/16
div. by 1024 osc/256
T0 = P3.4
TR0 = TCON.4
T0M = CKCON.3
1/4
1
C/T = TMOD.2
0
1/12 0
1
TL0
0
7
TF0
Interrupt
GATE = TMOD.3
INT0 = P3.2
TR1 = TCON.6
TH0
0
7
TF1
Interrupt
Capture Mode
Figure 13. Timer/Counter 0 Mode 3
The capture mode is enabled by setting the CP / RL2 bit in the T2CON register to a 1. In the capture
mode, Timer/Counter 2 serves as a 16 bit up counter. When the counter rolls over from FFFFh to
0000h, the TF2 bit is set, which will generate an interrupt request. If the EXEN2 bit is set, then a
negative transition of T2EX pin will cause the value in the TL2 and TH2 register to be captured by the
RCAP2L and RCAP2H registers. This action also causes the EXF2 bit in T2CON to be set, which will
also generate an interrupt. Setting the T2CR bit (T2MOD.3), the W77E532A allows hardware to reset
timer 2 automatically after the value of TL2 and TH2 have been captured.
Clock Source
Mode input
div. by 4 osc/1
div. by 64 osc/16
div. by 1024 osc/256
T2 = P1.0
TR2 = T2CON.2
T2EX = P1.1
T2M = CKCON.5
1/4
1
C/T2 = T2CON.1
0
1/12 0
1
EXEN2 = T2CON.3
TL2 TH2
T2CON.7
TF2
RCAP2L RCAP2H
EXF2
T2CON.6
Timer 2
Interrupt
Figure 14. 16-Bit Capture Mode
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Publication Release Date: November 19, 2007
Revision A9