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T89C51RD2-DDFC-L View Datasheet(PDF) - Atmel Corporation

Part Name
Description
Manufacturer
T89C51RD2-DDFC-L
Atmel
Atmel Corporation Atmel
T89C51RD2-DDFC-L Datasheet PDF : 86 Pages
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T89C51RD2
Table 11. CCAPnH: PCA Modules Capture/Compare Registers High
CCAPnH Address
n=0-4
CCAP0H=0FAH
CCAP1H=0FBH
CCAP2H=0FCH
CCAP3H=0FDH
CCAP4H=0FEH
7
6
5
4
3
2
1
0
Reset value
0
0
0
0
0
0
0
0
Table 12. CCAPnL: PCA Modules Capture/Compare Registers Low
CCAPnL Address
n=0-4
CCAP0L=0EAH
CCAP1L=0EBH
CCAP2L=0ECH
CCAP3L=0EDH
CCAP4L=0EEH
7
6
5
4
3
2
1
0
Reset value
0
0
0
0
0
0
0
0
Table 13. CH: PCA Counter High
CH
Address 0F9H
Reset value
7
6
5
4
3
2
1
0
0
0
0
0
0
0
0
0
Table 14. CL: PCA Counter Low
CL
Address 0E9H
Reset value
7
6
5
4
3
2
1
0
0
0
0
0
0
0
0
0
6.5.1. PCA Capture Mode
To use one of the PCA modules in the capture mode either one or both of the CCAPM bits CAPN and CAPP for
that module must be set. The external CEX input for the module (on port 1) is sampled for a transition. When a
valid transition occurs the PCA hardware loads the value of the PCA counter registers (CH and CL) into the
module's capture registers (CCAPnL and CCAPnH). If the CCFn bit for the module in the CCON SFR and the
ECCFn bit in the CCAPMn SFR are set then an interrupt will be generated (Refer to Figure 9).
27
Rev. F - 15 February, 2001
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