AN2131QC Cypress Semiconductor Corp, AN2131QC Datasheet - Page 54

• 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

EZ-USB devices divide RAM into two regions, one for code and data, and the other for
USB buffers and control registers.
EZ-USB TRM v1.9
3.1
1B3F
7FFF
7B40
1FFF
1B40
27FF
2000
0000
Introduction
Registers/Bulk Buffers
Registers/Bulk Buffers
Code(PSEN) RAM if
7FFF
7B40
0FFF
Data (RD/WR) RAM
Data (RD/WR) RAM
0000
Figure 3-1. EZ-USB 8-KB Memory Map - Addresses are in Hexadecimal
Figure 3-2. EZ-USB 4-KB Memory Map - Addresses are in Hexadecimal
If ISODISAB=1
(6,976 bytes)
Registers/Bulk Buffers
EA=0
Data (RD/WR) RAM
Code(PSEN) and
(4096 bytes)
3 EZ-USB Memory
Chapter 3. EZ-USB Memory
USB Control Registers
Bulk Endpoint Buffers
USB Control Registers
Bulk Endpoint Buffers
13 x 64-byte
(192 bytes)
(832 bytes)
(1,024 bytes)
16 x 64-byte
(192 bytes)
7FFF
7F40
7F3F
7C00
1FFF/7FFF
1F40/7F40
1F3F/7F3F
1B40/7B40
Page 3-1