参数资料
型号: SAB-C515C-LM
厂商: INFINEON TECHNOLOGIES AG
元件分类: 微控制器/微处理器
英文描述: 8-BIT, 10 MHz, MICROCONTROLLER, PQFP80
封装: PLASTIC, MQFP-80
文件页数: 18/98页
文件大小: 1117K
代理商: SAB-C515C-LM
C515C
Data Sheet
21
2003-02
Figure 7
Recommended Oscillator Circuitries
Multiple Datapointers
As a functional enhancement to the standard 8051 architecture, the C515C contains
eight 16-bit datapointers instead of only one datapointer. The instruction set uses just
one of these datapointers at a time. The selection of the actual datapointer is done in the
special function register DPSEL. Figure 8 illustrates the datapointer addressing
mechanism.
Figure 8
External Data Memory Addressing using Multiple Datapointers
MCT02765
XTAL1
XTAL2
XTAL1
Crystal/Resonator Oscillator Mode
Driving from External Source
External Oscillator
Signal
N.C.
2 - 10 MHz
C
C = 20 pF ± 10 pF (incl. stray capacitance)
Crystal Mode
:
Resonator Mode
= depends on selected ceramic resonator
C
DPH(83 )
DPL(82 )
DPTR0
DPTR7
.0
.1
.2
-
DPSEL(92 )
DPSEL
Selected
Data-
pointer
.2
.1
.0
DPTR 0
0
1
DPTR 1
0
1
0
DPTR 2
0
1
DPTR 3
1
0
DPTR 4
1
0
1
DPTR 5
1
0
DPTR 6
1
DPTR 7
MCD00779
External Data Memory
H
HH
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