User`s guide

LZ87010 Advance User’s Guide Enhanced Timers
1/15/03 8-7
Figure 8-5. Capture Unit Block Diagram
LZ87010-98
f(n)
PCLK
n
CLK
TO INTERRUPT
CONTROLLER
CTCAP(x)(y)
T(x)CAP.IED(y)
T(x)CNTH
TIMER 2 or TIMER 3 COUNT INTERRUPT ENABLE
CAPTURED TIMER COUNT CAPTURE STATUS
T(x)CNTL T(x)CAP.IIE(y)
T(x)CAP(y)H T(x)CAP(y)L T(x)STA.CAP(y)_ST
2
8
8
8
8
1
1
n f(n)
00
01
10
11
CAPTURE DISABLED
CAPTURE ON RISING EDGE
CAPTURE ON FALLING EDGE
CAPTURE ON BOTH EDGES
INTERNAL TO
THE LZ87010
EXTERNAL TO
THE LZ87010
Table 8-2. Capture Function
TIMER SIGNAL EDGE SELECT REGISTERS STATUS BIT
INTERRUPT
ENABLE
2
CTCAP2A T2CAP.IED0[1:0] TM2CAP0H, TM2CAP0L T2STA.CAP0_ST T2CAP.IIE0
CTCAP2B T2CAP.IED1[1:0] TM2CAP1H, TM2CAP1L T2STA.CAP1_ST T2CAP.IIE1
3
CTCAP3A T3CAP.IED0[1:0] TM3CAP0H, TM3CAP0L T3STA.CAP0_ST T3CAP.IIE0
CTCAP3B T3CAP.IED1[1:0] TM3CAP1H, TM3CAP1L T3STA.CAP1_ST T3CAP.IIE1