AN2135SC Cypress Semiconductor Corp, AN2135SC Datasheet - Page 277

• Manufacturer Part Number: AN2135SC
• Description: IC MCU 8051 8K RAM 24MHZ 44QFP
• Manufacturer: Cypress Semiconductor Corp
• Series: EZ-USB®r

Specifications of AN2135SC

• Applications: USB Microcontroller
• Core Processor: 8051
• Program Memory Type: ROMless
• Controller Series: AN213x
• Ram Size: 8K x 8
• Interface: I²C, USB
• Number Of I /o: 8
• Voltage - Supply: 3 V ~ 3.6 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 44-QFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 428-1308

A.4
The 8051 core is object code compatible with the industry standard 8051 micro-controller.
That is, object code compiled with an industry standard 8051 compiler or assembler will
execute on the 8051 core and will be functionally equivalent. However, because the 8051 core
uses a different instruction timing than the standard 8051, existing code with timing loops
may require modification.
The “Instruction Set” in Table B-2 on page B-5 lists the number of instruction cycles required
to perform each instruction on the 8051 core. The 8051 instruction cycle timing and number
of instruction cycles required for each instruction are compatible with the Dallas
Semiconductor DS80C320.
EZ-USB TRM v1.9
Software Compatibility
AD0-AD7
AD0-AD7
XTAL1
PORT2
PORT2
PSEN#
PSEN#
ALE
ALE
Figure A-1. Comparative Timing of 8051 and Industry Standard 8051
single byte single cycle instruction
single byte single cycle instruction
4
Appendix A: 8051 Introduction
Standard 8051 Timing
12
8051 Timing
A - 3