AN2131QC Cypress Semiconductor Corp, AN2131QC Datasheet - Page 46

• Manufacturer Part Number: AN2131QC
• Description: IC MCU 8051 8K RAM 24MHZ 80BQFP
• Manufacturer: Cypress Semiconductor Corp
• Series: EZ-USB®r

Specifications of AN2131QC

• 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: 24
• Voltage - Supply: 3 V ~ 3.6 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 80-QFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 428-1307

The EZ-USB built-in microprocessor, an enhanced 8051 core, is fully described in Appen-
dices A-C. This chapter introduces the processor, its interface to the EZ-USB core, and
describes architectural differences from a standard 8051.
The enhanced 8051 core uses the standard 8051 instruction set. Instructions execute faster
than with the standard 8051 due to two features:
In addition to the speed improvement, the enhanced 8051 core also includes architectural
enhancements:
EZ-USB TRM v1.9
2.1
2.2
•
•
1. A second data pointer.
2. A second UART.
3. A third, 16-bit timer (TIMER2).
4. A high-speed memory interface with a non-multiplexed 16-bit address bus.
5. Eight additional interrupts (INT2-INT5, PFI, T2, and UART1).
6. Variable MOVX timing to accommodate fast/slow RAM peripherals.
7. 3.3V operation.
Wasted bus cycles are eliminated. A bus cycle uses four clocks, as compared to 12
clocks with the standard 8051.
The 8051 runs at 24 MHz.
Introduction
8051 Enhancements
2 EZ-USB CPU
Chapter 2. EZ-USB CPU
Page 2-1