45181 Parallax Inc, 45181 Datasheet - Page 109

• Manufacturer Part Number: 45181
• Description: SX TECH TOOL KIT NO POWER
• Manufacturer: Parallax Inc
• Series: SXr
• Type: Microcontrollerr

Specifications of 45181

• Contents: SX Book, SX Key, SX Tech Board, Samples, Resonators, Cable and Manual
• Product: Microcontroller Basic Stamps
• Operating Supply Voltage: 5 V
• For Use With/related Products: SX MCUs
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

11 Appendix A: SX Features
11.1 Introduction
The SX chip is a fully static CMOS MPU conservatively rated for DC to 50 (or 75) MHz operation. The
SX provides 2K words of on-chip E²Flash program memory (4K words in SX48/52). In Turbo mode, all
instructions are single cycle except program branches, which take three cycles, and IREAD, which takes
four cycles.
11.2 CPU Features
11.3 Peripheral and I/O Features
Single cycle instruction execution (20 ns cycle time @ 50 MHz, 13.3 ns @ 75 MHz)
DC to 50 MHz operation (75 MHz on selected chips)
User selectable clock options: (Internal R/C, External R/C, resonator, crystal oscillator or crystal-
oscillator pack)
Internal R/C oscillator (31 KHz to 4 MHz, +/- 8% accuracy)
43 single-word basic instructions
2048 x 12-bits (4096 x 12-bits in SX48/52) E²Flash program memory rated for 10,000 rewrite cycles
Up to 137 bytes (262 bytes in SX48/52) of directly, or indirectly, addressable RAM
Selectable 8-level hardware stack
Fixed interrupt response time: 60 ns internal, 100 ns external
Hardware context save/restore of PC, W, STATUS, and FSR on interrupt.
Multi-Input Wake-Up (MIWU) on 8 pins
In-system programming via OSC pins
Single-step and breakpoint debugging via OSC2 pin
Analog comparator (RB0 out, RB1 in-, RB2 in+)
Built-in brown-out detector (On/Off, 4.2V) (4.2, 2.6, 2.2, Off in SX48/52)
W mappable into RTCC space for flexibility
Nine sources of interrupts (17 in SX48/52)
1998 UL compliance and fast lookup provided through run-time readable code
Every pin programmable as input or output
Inputs are each TTL or CMOS level selectable
All pins include selectable internal pull-ups (~20 k to V
RB, RC, RD and RE inputs each selectable as Schmitt Trigger
SX-Key/Blitz Development System Manual 2.0 Parallax, Inc. Page 109
11 Appendix A: SX Features
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