SX18AC/SO Parallax Inc, SX18AC/SO Datasheet
SX18AC/SO
Manufacturer Part Number
SX18AC/SO
Description
IC MCU 2K FLASH 50MHZ SO-18
Manufacturer
Parallax Inc
Series
SXr
Datasheet
1.SX18ACSO.pdf
(43 pages)
Specifications of SX18AC/SO
Core Processor
RISC
Core Size
8-Bit
Speed
50MHz
Number Of I /o
12
Program Memory Size
3KB (2K x 12)
Program Memory Type
FLASH
Ram Size
137 x 8
Oscillator Type
Internal
Operating Temperature
0°C ~ 70°C
Package / Case
18-SOIC
Voltage - Supply (vcc/vdd)
-
Eeprom Size
-
Data Converters
-
Peripherals
-
Connectivity
-
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
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.
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.
© 1998 Scenix Semiconductor, Inc. All rights reserved.
Scenix™ and the Scenix logo are trademarks of Scenix Semiconductor, Inc.
I
PIC® is a registered trademark of Microchip Technology, Inc.
Microchip® is a registered trademark of Microchip Technology, Inc.
2
C™ is a trademark of Philips Corporation
OSC1 OSC2
RC OSC
Instruction Pipeline
Internal
Driver
4MHz
OSC
Brown-Out
Power-On
System Clock
Four - Stage
Reset
8
Select
Clock
4 or
RESET
MCLR
MIWU
1
8
System
Clock
8-bit Watchdog
Timer (WDT)
OPTION
STATUS
MODE
FSR
PC
W
Prescaler for RTCC
Postscaler for WDT
Figure 1-1. Block Diagram
or
Address
8
Internal Data Bus
Address
8
- 1 -
Write Data
8-bit Timer
8
1.2 Key Features
• 50 MIPS performance at 50 MHz oscillator frequency
• 2048 x 12 bits EE/Flash program memory rated for
• 136 x 8 bits SRAM
• In-system programming capability through OSC pins
• Internal RC oscillator with configurable rate from 31.25
• User selectable clock modes:
SX-Key™ is a trademark of Parallax, Inc.
Microwire™ is a trademark of National Semiconductor Corporation
All other trademarks mentioned in this document are property of their respec-
tive companies.
RTCC
RTCC
8
10,000 rewrite cycles
KHz to 4 MHz, 8% accuracy
– Internal RC oscillator
– External oscillator
– Crystal/resonator options
– External RC oscillator (continued on page 3)
12
12
Read Data
8
Interrupt
136 Bytes
SRAM
Instruction
ALU
8
8
MIWU
Programming
Debugging
EEPROM
In-System
In-System
2k x 12
8
Port B
8
8
Port A
PRELIMINARY
3
December 3, 1998
8
4
www.scenix.com
Analog
Comp
Port C
8
8
8
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