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| 型号： | DS89C430-QNL+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 27/46页 |
| 文件大小： | 0K |
| 描述： | IC MCU FLASH 16KB 33MHZ 44-PLCC |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 26 |
| 系列： | 89C |
| 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： | 闪存 |
| 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： | 44-LCC（J 形引线） |
| 包装： | 管件 |
| 产品目录页面： | 703 (CN2011-ZH PDF) |
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DS89C430/DS89C450 Ultra-High-Speed Flash Microcontrollers
33 of 46
Table 10. Page Mode 2, Data Memory Cycle Stretch Values (PAGES1:PAGES0 = 11)
RD/WR
PULSE WIDTH (IN NUMBER OF OSCILLATOR CLOCKS)
MD2:MD0
STRETCH
CYCLES
4X/2X, CD1,
CD0 = 100
4X/2X, CD1,
CD0 = 000
4X/2X, CD1,
CD0 = X10
4X/2X, CD1,
CD0 = X11
000
0
0.5
1
2
2048
001
1
2
4
4096
010
2
4
8
8192
011
3
6
12
12,288
100
7
4
8
16
16,384
101
8
5
10
20
20,480
110
9
6
12
24
24,576
111
10
7
14
28
28,672
As shown in the previous tables, the stretch feature supports eight stretched external data-memory access options,
which can be categorized into three timing groups. When the stretch value is cleared to 000b, there is no stretch on
external data memory access, and a MOVX instruction is completed in two basic memory cycles. When the stretch
value is set to 1, 2, or 3, the external data memory access is extended by 1, 2, or 3 stretch memory cycles,
respectively. Note that the first stretch value does not result in adding four system clocks to the control signals. This
is because the first stretch uses one system clock to create additional address setup and data bus float time and
one system clock to create additional address and data hold time. When using very slow RAM and peripherals, a
larger stretch value (4–7) can be selected. In this stretch category, two stretch cycles are used to create additional
setup (the ALE pulse width is also stretched by one stretch cycle for page miss) and one stretch cycle is used to
create additional hold time. The following timing diagrams illustrate the external data memory access at divide-by-1
system clock mode (CD1:CD0 = 10b).
Figure 12 illustrates the external data-memory stretch-cycle timing relationship when PAGEE = 1 and
PAGES1:PAGES0 = 01. The stretch cycle shown is for a stretch value of 1 and is coincident with a page miss.
Note that the first stretch value does not result in adding four system clocks to the RD/WR control signals. This is
because the first stretch uses one system clock to create additional setup and one system clock to create
additional hold time.
Figure 13 shows the timing relationship for a slow peripheral interface (stretch value = 4). Note that a page hit data
memory cycle is shorter than a page miss data memory cycle. The ALE pulse width is also stretched by a stretch
cycle in the case of a page miss.
The stretched data memory bus cycle timing relationship for PAGES = 11 is identical to nonpage mode operation
since the basic data memory cycle always contains four system clocks in this page mode operation.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS89C430-QNL+ | 功能描述:8位微控制器 -MCU Ultra-High-Speed Flash MCU 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 |
| DS89C430-QNL+ | 制造商:Maxim Integrated Products 功能描述:IC 8BIT MCU 8051 33MHZ LCC-44 |
| DS89C440 | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:Ultra-High-Speed Flash Microcontrollers |
| DS89C440-ENG | 功能描述:IC MCU FLASH 32KB 25MHZ 44-TQFP RoHS:否 类别:集成电路 (IC) >> 嵌入式 - 微控制器， 系列:89C 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:260 系列:73S12xx 核心处理器:80515 芯体尺寸:8-位 速度:24MHz 连通性:I²C，智能卡，UART/USART，USB 外围设备:LED，POR，WDT 输入/输出数:9 程序存储器容量:64KB（64K x 8） 程序存储器类型:闪存 EEPROM 大小:- RAM 容量:2K x 8 电压 - 电源 (Vcc/Vdd):2.7 V ~ 5.5 V 数据转换器:- 振荡器型:内部 工作温度:-40°C ~ 85°C 封装/外壳:68-VFQFN 裸露焊盘 包装:管件 |
| DS89C440-ENL | 功能描述:IC MCU FLASH 32KB 33MHZ 44-TQFP RoHS:否 类别:集成电路 (IC) >> 嵌入式 - 微控制器， 系列:89C 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:260 系列:73S12xx 核心处理器:80515 芯体尺寸:8-位 速度:24MHz 连通性:I²C，智能卡，UART/USART，USB 外围设备:LED，POR，WDT 输入/输出数:9 程序存储器容量:64KB（64K x 8） 程序存储器类型:闪存 EEPROM 大小:- RAM 容量:2K x 8 电压 - 电源 (Vcc/Vdd):2.7 V ~ 5.5 V 数据转换器:- 振荡器型:内部 工作温度:-40°C ~ 85°C 封装/外壳:68-VFQFN 裸露焊盘 包装:管件 |
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