- 您现在的位置：买卖IC网 > PDF目录10911 > DS87C530-QNL (Maxim Integrated Products)IC MCU EPR/ROM W/RTC 33MZ 52PLCC PDF资料下载
参数资料
| 型号： | DS87C530-QNL |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 8/45页 |
| 文件大小： | 0K |
| 描述： | IC MCU EPR/ROM W/RTC 33MZ 52PLCC |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 23 |
| 系列： | 87C |
| 核心处理器： | 8051 |
| 芯体尺寸： | 8-位 |
| 速度： | 33MHz |
| 连通性： | EBI/EMI，SIO，UART/USART |
| 外围设备： | 电源故障复位，WDT |
| 输入/输出数： | 32 |
| 程序存储器容量： | 16KB（16K x 8） |
| 程序存储器类型： | OTP |
| RAM 容量： | 1K x 8 |
| 电压 - 电源 (Vcc/Vdd)： | 4.5 V ~ 5.5 V |
| 振荡器型： | 外部 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 52-LCC（J 形引线） |
| 包装： | 管件 |
| 其它名称： | DS87C530QNL |
第1页第2页第3页第4页第5页第6页第7页当前第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页
DS87C530/DS83C530 EPROM/ROM Microcontrollers with Real-Time Clock
16 of 45
Using a Stretch value between 1 and 7 causes the microcontroller to stretch the read/write strobe and all
related timing. Also, setup and hold times are increased by 1 clock when using any Stretch greater than 0.
This results in a wider read/write strobe and relaxed interface timing, allowing more time for
memory/peripherals to respond. The timing of the variable speed MOVX is in the Electrical
Specifications section. Table 3 shows the resulting strobe widths for each Stretch value. The memory
Stretch uses the Clock Control Special Function Register at SFR location 8Eh. The Stretch value is
selected using bits CKCON.2–0. In the table, these bits are referred to as M2 through M0. The first
Stretch (default) allows the use of common 120ns RAMs without dramatically lengthening the memory
access.
Table 3. Data Memory Cycle Stretch Values
CKCON.2–0
M2
M1
M0
MEMORY CYCLES
RD OR WR STROBE
WIDTH IN CLOCKS
STROBE WIDTH TIME
AT 33MHz
(ns)
0
2 (forced internal)
2
60
0
1
3 (default external)
4
121
0
1
0
4
8
242
0
1
5
12
364
1
0
6
16
485
1
0
1
7
20
606
1
0
8
24
727
1
9
28
848
DUAL DATA POINTER
The timing of block moves of data memory is faster using the Dual Data Pointer (DPTR). The standard
8051 DPTR is a 16-bit value that is used to address off-chip data RAM or peripherals. In the
DS87C530/DS83C530, the standard data pointer is called DPTR, located at SFR addresses 82h and 83h.
These are the standard locations. Using DPTR requires no modification of standard code. The new DPTR
at SFR 84h and 85h is called DPTR1. The DPTR Select bit (DPS) chooses the active pointer. Its location
is the lsb of the SFR location 86h. No other bits in register 86h have any effect and are 0. The user
switches between data pointers by toggling the lsb of register 86h. The increment (INC) instruction is the
fastest way to accomplish this. All DPTR-related instructions use the currently selected DPTR for any
activity. Therefore it takes only one instruction to switch from a source to a destination address. Using the
Dual Data Pointer saves code from needing to save source and destination addresses when doing a block
move. The software simply switches between DPTR and 1 once software loads them. The relevant
register locations are as follows.
DPL
82h
Low byte original DPTR
DPH
83h
High byte original DPTR
DPL1
84h
Low byte new DPTR
DPH1
85h
High byte new DPTR
DPS
86h
DPTR Select (lsb)
相关PDF资料 |
PDF描述 |
|---|---|
| DS80C320-MNL+ | IC MCU HI SPEED 33MHZ IND 40-DIP |
| A5191HRTPG-XTP | MODEM HART SGL CMOS 28PLCC |
| VE-2NL-IX-F2 | CONVERTER MOD DC/DC 28V 75W |
| VE-2NL-IX-F1 | CONVERTER MOD DC/DC 28V 75W |
| VE-2NK-IX-F4 | CONVERTER MOD DC/DC 40V 75W |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DS87C530-QNL+ | 功能描述:8位微控制器 -MCU EPROM MCU w/RTC RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT |
| DS87C530Z+ECL | 制造商:Maxim Integrated Products 功能描述:MICRO OTP RTC 33MHZ 52P TQFP PB-FRR - Trays |
| DS87C550 | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:EPROM High-Speed Micro with A/D and PWM |
| DS87C550-FCL | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:EPROM High-Speed Micro with A/D and PWM |
| DS87C550-FNL | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:EPROM High-Speed Micro with A/D and PWM |
发布紧急采购，3分钟左右您将得到回复。