參數(shù)資料
型號: VCT3801A
廠商: MICRONAS SEMICONDUCTOR HOLDING AG
英文描述: Video/Controller/Teletext IC Family
中文描述: 視頻/控制/圖文電視IC系列
文件頁數(shù): 115/172頁
文件大小: 2243K
代理商: VCT3801A
ADVANCE INFORMATION
VCT 38xxA
Micronas
115
5.14.Capture Compare Module (CAPCOM)
The Capture Compare Module (CAPCOM) is a com-
plex relative timer. It comprises a free running 16-bit
Capture Compare Counter (CCC) and 2 Capture Com-
pare Subunits (SU). The CCC provides an interrupt on
overflow and the timervalue can be read by software.
A SU is able to capture the relative time of an external
event input and to generate an output signal when the
CCC passes a predefined timer value. Three types of
interrupts enable interaction with SW. Special function-
ality provides an interface to the asynchronous exter-
nal world.
5.14.1.Features
– 16-bit free running counter with read out.
– 16-bit capture register.
– 16-bit compare register.
– Input trigger on rising, falling or both edges.
– Output action: toggle, Low or High level.
– Three different interrupt sources: overflow, input,
compare
– Designed for interfacing to asynchronous external
events
Fig. 5–23:
Block diagram of CAPCOM module
A
B
=
&
>1
0
0
1
1
0
1
0
1
0
0
1
1
0
1
0
1
TOGGLE
Low
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
2
MSK MSK MSK FOL
CAP CMP OFL LAC RCR
X
X
X
16-Bit Compare-Register
CC0
16-Bit Capture-Register
r
w
16
16
3
2
0
1
2
ofl
CC0M
CC0I
>1
load
CC0COMP
Interrupt
Source
CC0OR
Interrupt
Source
IAM
OAM
&
&
reset
Output Action Logic
Input Action Logic
16
Subunit 0
CCC
clk
CC0-IN
CC0-OUT
16
Timer Value
Subunit 1
CC1-IN
CC1-OUT
SR0.CCC
ofl
Timer Value
CCCOFL
Interrupt
Source
CC1OR
Interrupt
Source
CC1COMP
Interrupt
Source
2
CCCS.CSF
4:1
Mux
f
OSC
/2
0
f
OSC
/2
4
f
OSC
/2
8
f
OSC
/2
12
0
1
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