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SX28AC75DP

更新时间： 2024-11-27 23:35:43
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其他 - ETC /
页数 文件大小 规格书
42页 313K
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IC-8-BIT MCU

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SX28AC75DP 数据手册

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PRELIMINARY  
May 30, 1999  
Devices with Datcode Axyywwxx  
SX18AC / SX20AC / SX28AC  
High-Performance 8-Bit Microcontrollers with EE/Flash Program  
Memory and In-System Programming Capability  
1.0 PRODUCT OVERVIEW  
1.1 Introduction  
1.2 Key Features  
The SX18AC, SX20AC, and SX28AC are members of  
the SX family of high-performance 8-bit microcontrollers  
fabricated in an advanced CMOS process technology.  
The advanced process, combined with a RISC-based  
architecture, allows high-speed computation, flexible I/O  
control, and efficient data manipulation. Throughput is  
enhanced by operating the device at frequencies up to 50  
MHz and by optimizing the instruction set to include  
mostly single-cycle instructions.  
• 50 MIPS performance at 50 MHz oscillator frequency  
• 2048 x 12 bits EE/Flash program memory rated for  
10,000 rewrite cycles  
• 136 x 8 bits SRAM  
• In-system programming capability through OSC pins  
• Internal RC oscillator with configurable rate from 31.25  
KHz to 4 MHz, +8% accuracy  
• User selectable clock modes:  
– Internal RC oscillator  
On-chip functions include a general-purpose 8-bit timer  
with prescaler, an analog comparator, a brown-out detec-  
tor, a watchdog timer, a power-save mode with multi-  
source wakeup capability, an internal R/C oscillator,  
user-selectable clock modes, and high-current outputs.  
– External oscillator  
– Crystal/resonator options  
– External RC oscillator (continued on page 3)  
RTCC  
OSC1  
OSC2  
OSC  
8-bit Watchdog  
Timer (WDT)  
8-bit Timer  
RTCC  
Driver  
Clock  
Select  
4MHz  
Internal  
RC OSC  
¸
4 or ¸ 1  
Interrupt Stack  
8
System Clock  
MCLR  
Prescaler for RTCC  
or  
Power-On  
Reset  
Analog  
Comp  
3
Interrupt  
RESET  
MIWU  
8
Port B  
8
Prescaler for WDT  
Brown-Out  
8
System  
Clock  
MIWU  
Internal Data Bus  
8
8
8
8
8
8
8
8
W
In-System  
PC  
3 Level  
Stack  
Debugging  
Port A Port C  
8
ALU  
FSR  
PC  
Address  
Fetch  
In-System  
Programming  
4
8
Instruction  
Pipeline  
Decode  
136 Bytes  
SRAM  
STATUS  
OPTION  
MODE  
Executive  
Write Back  
2k x 12  
EEPROM  
Address  
12  
Write Data  
8
Read Data  
Instruction  
8
12  
IREAD  
Figure 1-1. Block Diagram  
Scenix™ and the Scenix logo are trademarks of Scenix Semiconductor, Inc.  
I2C™ is a trademark of Philips Corporation  
SX-Key™ is a trademark of Parallax, Inc.  
Microwire™ is a trademark of National Semiconductor Corporation  
PIC® is a registered trademark of Microchip Technology, Inc.  
Microchip® is a registered trademark of Microchip Technology, Inc.  
All other trademarks mentioned in this document are property of their respec-  
tive companies.  
© 1999 Scenix Semiconductor, Inc. All rights reserved.  
- 1 -  
www.scenix.com  
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