參數(shù)資料
型號(hào)： DS83C530
廠商： Maxim Integrated Products, Inc.
英文描述： EPROM/ROM Micro with Real Time Clock(帶實(shí)時(shí)時(shí)鐘的EPROM/ROM高速微控制器)
中文描述： EPROM微控制器，帶有實(shí)時(shí)時(shí)鐘
文件頁(yè)數(shù)： 13/41頁(yè)
文件大小： 437K
代理商： DS83C530
DS87C530/DS83C530
070898 13/41
ROM MEMORY MAP
Figure 4
ON CHIP
OFF CHIP
OFF CHIP
EA=1
EA=0
64K
16K
64K
FFFFh
0000h
FFFFh
0000h
3FFFh
DEFAULT = 16K BYTES
ROM SIZE IGNORED
USER
SELECTABLE
DATA MEMORY ACCESS
Unlike
many
DS87C530/DS83C530 contains on–chip data memory.
It also contains the standard 256 bytes of RAM
accessed by direct instructions. These areas are sepa-
rate. The MOVX instruction accesses the on–chip data
memory. Although physically on–chip, software treats
this area as though it was located off–chip. The 1KB of
SRAM is between address 0000h and 03FFh.
8051
derivatives,
the
Access to the on–chip data RAM is optional under soft-
ware control. When enabled by software, the data
SRAM is between 0000h and 03FFh. Any MOVX
instruction that uses this area will go to the on–chip RAM
while enabled. MOVX addresses greater than 03FFh
automatically go to external memory through Ports 0
and 2.
When disabled, the 1KB memory area is transparent to
the system memory map. Any MOVX directed to the
space between 0000h and FFFFh goes to the expanded
bus on Ports 0 and 2. This also is the default condition.
This default allows the DS87C530/DS83C530 to drop
into an existing system that uses these addresses for
other hardware and still have full compatibility.
The on–chip data area is software selectable using two
bits in the Power Management Register at location C4h.
This selection is dynamically programmable. Thus
access to the on–chip area becomes transparent to
reach off–chip devices at the same addresses. The con-
trol bits are DME1 (PMR.1) and DME0 (PMR.0). They
have the following operation:
DATA MEMORY ACCESS CONTROL
Table 3
DME1
DME0
DATA MEMORY ADDRESS
MEMORY FUNCTION
0
0
0000h – FFFFh
External Data Memory *Default condition
0
1
0000h – 03FFh
0400h – FFFFh
Internal SRAM Data Memory
External Data Memory
1
0
Reserved
Reserved
1
1
0000h – 03FFh
0400h – FFFBh
FFFCh
FFFDh–FFFh
Internal SRAM Data Memory
Reserved – no external access
Read access to the status of lock bits
Reserved – no external access
Notes on the status byte read at FFFCh with DME1, 0 = 1, 1: Bits 2–0 reflect the programmed status of the security lock
bits LB2–LB0. They are individually set to a logic 1 to correspond to a security lock bit that has been programmed.
These status bits allow software to verify that the part has been locked before running if desired. The bits are read only.
Note: After internal MOVX SRAM has been initialized, changing bits DEM0/1 will have no affect on the contents of the
SRAM.
相關(guān)PDF資料
PDF描述
DS87C530 EPROM/ROM Micro with Real Time Clock(帶實(shí)時(shí)時(shí)鐘的EPROM/ROM高速微控制器)
DS87C550 EPROM High-Speed Micro with A/D and PWM(帶 A/D 和 PWM的EPROM/ROM高速微控制器)
DS9503 ESD Protection Diode with Resistors(帶電阻器的ESD保護(hù)二極管)
DSTINIM400 Networked Microcontroller Evaluation Kit
DSTINIS-005 Sockets Evaluation Board
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DS83C530-DS87C530 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:EPROM/ROM Microcontrollers with Real-Time Clock
DS83C530-ECL 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:EPROM/ROM Microcontrollers with Real-Time Clock
DS83C530-ECL+ 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:EPROM/ROM Microcontrollers with Real-Time Clock
DS83C530-ENL 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:EPROM/ROM Microcontrollers with Real-Time Clock
DS83C530-ENL+ 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:EPROM/ROM Microcontrollers with Real-Time Clock
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*