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AM186ES-33VCW 数据表(PDF) 11 Page - Advanced Micro Devices |
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AM186ES-33VCW 数据表(HTML) 11 Page - Advanced Micro Devices |
11 / 102 page Am186/188ES and Am186/188ESLV Microcontrollers 11 P R E L IMINAR Y connects to the data inputs and outputs, and the chip selects connect to the memory chip-select inputs. The RD output connects to the SRAM Output Enable (OE) pin for read operations. Write operations use the byte-write enables connected to the SRAM Write Enable (WE) pins. The example design uses 2-Mbit memory technology (256 Kbytes) to fully populate the available address space. Two flash PROM devices provide 512 Kbytes of nonvolatile program storage, and two static RAM devices provide 512 Kbytes of data storage area. COMPARING THE ES TO THE 80C186 Figure 1 shows an example system using a 40-MHz Am 18 6ES micr oco n t r olle r . F i g u r e 2 sh ow s a comparable system implementation with an 80C186. Because of its superior integration, the Am186ES microcontroller system does not require the support devices that are required on the 80C186 example system. In addition, the Am186ES microcontroller provides significantly better performance with its 40- MHz clock rate. Figure 2. 80C186 Microcontroller Example System Design COMPARING THE ES TO THE EMTABLE1 C omp ar ed t o the Am186 EM and Am188 EM microcontrollers, the Am186ES and Am188ES microcontrollers have the following additional features: n Two full-featured asynchronous serial ports n The ability to use DMA to and from the serial ports n Two additional external interrupt signals n Enhancements to the watchdog timer to improve its security and functionality n A pulse width demodulation option n A data strobe bus interface option for DEN n ARDY functionality is changed to allow both edges of ARDY to be asynchronous to the clock n An option to have all MCS space asserted through MCS0 n On the Am186ES microcontroller, static bus sizing allows UCS space to use a 16-bit data bus, while LCS space can be either 8-bit or 16-bit. All non- UCS and non-LCS memory and I/O accesses can be 8-bit or 16-bit. This capability is available only on the Am186ES microcontroller; the Am188ES micro- controller has a uniform 8-bit access width. n The synchronous serial interface is removed n On the ES, row addresses are not driven on DRAM refreshes Two Asynchronous Serial Ports The Am186ES and Am188ES microcontrollers have two identical asynchronous serial ports. Each serial UCS WR WE OE CS AD15–AD0 ALE 40-MHz Crystal Address Data Timer 0–2 INT3 DMA 0–1 CLKOUT 20 MHz X2 X1 SRAM WE WE Address Data OE CS RD LCS BHE A0 PCS0 LATCH Serial Port RS-232 Level Converter INT2–INT0 PIOs Am29F200 Flash |
类似零件编号 - AM186ES-33VCW |
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类似说明 - AM186ES-33VCW |
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