AN2131SC Cypress Semiconductor Corp, AN2131SC Datasheet - Page 34

• Manufacturer Part Number: AN2131SC
• Description: IC MCU 8051 8K RAM 24MHZ 44QFP
• Manufacturer: Cypress Semiconductor Corp
• Series: EZ-USB®r

Specifications of AN2131SC

• 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: 16
• 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: 428-1306; AN2131SC

48-pin Variants
There are two 48-pin devices:
The four extra pins are used as follows:
Bulk Endpoints
The AN2122 and AN2126 have a reduced set of thirteen bulk endpoints (see Section 6.1,
"Introduction").
Interrupts
The AN2122 and AN2126 contain two interrupts not present in the other AN21xx family
members.
The Revision ID for each part is shown in Table 1.2. The revision value is reported in the
internal DID (Device ID), which is the value read by the host during enumeration if no
EEPROM is connected to the I
EZ-USB TRM v1.9
1.19
•
•
•
•
AN2122T
AN2126T
PA7, PA6, and PA0 are GPIO pins. This makes five of the eight PORTA pins
available (all except PA1-PA3).
CPU12MHZ - This input controls the speed of the 8051:
An IBN (In-Bulk NAK) interrupt request activates when an IN packet is NAKd by
the SIE because the 8051 has not loaded the buffer (and byte count register) for an
IN endpoint. This is useful for applications that need to know when the host is
pinging an IN endpoint (see Section 9.13, "In Bulk NAK Interrupt - (AN2122/
AN2126 only)").
An I
mission of a STOP bit is complete (see Section 9.14, "I
rupt - (AN2122/AN2126 only)").
Revision ID
-
-
2
C interrupt source is added to the I
tied high 12 MHz
tied low 24 MHz
2
C bus. This value also appears in the CPUCS register bits.
Chapter 1. Introducing EZ-USB
2
C interrupt (INT3), indicating that trans-
2
C STOP Complete Inter-
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