MC96FM204/FM214
104
April 7, 2016 Ver. 1.8
11.6.3 16-Bit Capture Mode
The timer 2 capture mode is set by T2MS[1:0]
as ‘01’. The clock source can use the internal/external clock.
Basically, it has the same function as the 16-bit timer/counter mode and the interrupt occurs when T2CNTH/L is
equal to T2ADRH/L. The T2CNTH/T2CNTL values are automatically cleared by match signal . It can be also
cleared by software (T2CC).
This timer interrupt in capture mode is very useful when the pulse width of captured signal is wider than the
maximum period of timer.
The capture result is loaded into T2BDRH/T2BDRL.
According to EIPOL1 registers setting, the external interrupt EINT12 function is chosen. Of course, the EINT12
pin must be set as an input port.
A Match
T2CC
T2EN
P
r
e
s
c
a
l
e
r
fx
M
U
X
fx/2
fx/4
fx/64
fx/512
fx/2048
fx/8
fx/1
16-bit Counter
T2CNTH/T2CNTL
16-bit B Data Register
T2BDRH/T2BDRL
Clear
Edge
Detector
T2ECE
EC2
Comparator
16-bit A Data Register
T2ADRH/T2ADRL
T2IFR
INT_ACK
Clear
To interrupt
block
A Match
Buffer Register A
Reload
R
EINT12
T2CNTR
T2EN
3
T2CK[2:0]
Clear
EIPOLB[3:2]
FLAG12
(EIFLAG.5)
INT_ACK
Clear
To interrupt
block
2
T2MS[1:0]
2
A Match
T2CC
T2EN
T2EN
T2CRH
1
ADDRESS:C3H
INITIAL VALUE : 0000_0000B
–
T2MS1
T2MS0
–
–
–
T2CC
–
0
1
–
–
–
X
T2CK2
T2CRL
X
ADDRESS:C2H
INITIAL VALUE : 0000_0000B
T2CK1
T2CK0
T2IFR
–
T2POL
T2ECE T2CNTR
X
X
X
–
X
X
X
Figure 11.18 16-Bit Capture Mode for Timer 2
Summary of Contents for MC96FM204
Page 17: ...MC96FM204 FM214 April 7 2016 Ver 1 8 17 4 Package Diagram Figure 4 1 20 Pin SOP Package ...
Page 18: ...MC96FM204 FM214 18 April 7 2016 Ver 1 8 Figure 4 2 20 Pin TSSOP Package ...
Page 19: ...MC96FM204 FM214 April 7 2016 Ver 1 8 19 Figure 4 3 16 Pin SOP Package ...
Page 20: ...MC96FM204 FM214 20 April 7 2016 Ver 1 8 Figure 4 4 16 Pin TSSOP Package ...