参数资料
型号: SAK-C505A-4R
厂商: INFINEON TECHNOLOGIES AG
元件分类: 微控制器/微处理器
英文描述: 8-BIT, MROM, 20 MHz, MICROCONTROLLER, PQFP44
封装: METRIC, PLASTIC, QFP-44
文件页数: 13/88页
文件大小: 1224K
代理商: SAK-C505A-4R
C505/C505C/C505A/C505CA
Data Sheet
16
12.00
Multiple Datapointers
As a functional enhancement to the standard 8051 architecture, the C505 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 regsiter DPSEL.
Figure 8 illustrates the datapointer addressing mechanism.
Figure 8
External Data Memory Addressing using Multiple Datapointers
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
相关PDF资料
PDF描述
SAB-C505A-4E 8-BIT, OTPROM, 20 MHz, MICROCONTROLLER, PQFP44
SAB-C505A-L 8-BIT, 20 MHz, MICROCONTROLLER, PQFP44
SAF-C505A-4R 8-BIT, MROM, 20 MHz, MICROCONTROLLER, PQFP44
SAB-C505-L 8-BIT, 20 MHz, MICROCONTROLLER, PQFP44
SAF-C505C-2R 8-BIT, MROM, 20 MHz, MICROCONTROLLER, PQFP44
相关代理商/技术参数
参数描述
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SAK-C505CA4EMCA 制造商:Infineon Technologies AG 功能描述:
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SAK-C505CA-4EMCA/TR 制造商:Infineon Technologies AG 功能描述: