AN2131QC Cypress Semiconductor Corp, AN2131QC Datasheet - Page 85

• 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

If, at power-on, the EZ-USB core detects an EEPROM connected to its I
value 0xB2 at address 0; the EZ-USB core loads the EEPROM data into EZ-USB RAM.
It also sets the ReNum bit to 1, causing device requests to be fielded by the 8051 instead of
the EZ-USB core. The EEPROM data format is shown in Table 5-8.
The first byte tells the EZ-USB core to copy EEPROM data into RAM. The next six bytes
(1-6) are ignored (see the text box, “VID/PID/DID in a “B2” EEPROM” on page 5-11).
Page 5-10
5.8
Serial EEPROM Present, First Byte is 0xB2
Table 5-8. EEPROM Data Format for “B2” Load
0
1
2
3
4
5
6
7
8
9
10
---
---
---
---
---
---
---
---
---
---
---
---
---
Last
EEPROM
Address
Chapter 5. EZ-USB CPU
0xB2
Vendor ID (VID) L
Vendor ID (VID) H
Product ID (PID) L
Product ID (PID) H
Device ID (DID) L
Device ID (DID) H
Length H
Length L
StartAddr H
StartAddr L
Data block
Length H
Length L
StartAddr H
StartAddr L
Data block
0x80
0x01
0x7F
0x92
00000000
Contents
2
C port with the
EZ-USB TRM v1.9