Microchip Technology AT91SAM9G20B-CU - Semicone IC Supplier

Mfr	Microchip Technology
Device Type	32-bit ARM926EJ-S Embedded Microprocessor (MPU)
Core Processor	ARM926EJ-S (ARM Thumb)
Core Size	32-bit Single Core
Maximum CPU Speed	400 MHz
System Bus / EBI Speed	133 MHz
General-Purpose I/O	96 I/O Lines
Ethernet	10/100 Mbps Ethernet MAC
Serial Interfaces	USART, UART, SPI, I²C, SSC
ADC	4-channel, 10-bit ADC
Timers	7 Timers total
PWM	2 PWM Channels
Core Supply Voltage (VDDCORE)	0.9 V to 1.1 V
I/O Supply Voltage	1.8 V / 3.3 V
Operating Temperature	–40°C to +85°C
Package	217-LFBGA
Mounting Type	Surface Mount
Compliance	RoHS Compliant

The AT91SAM9G20B-CU is a high-performance 32-bit ARM926EJ-S-based embedded microprocessor unit (MPU) from Microchip Technology, operating at 400MHz with 32KB instruction and 32KB data cache memories for efficient data processing. This device integrates 32KB internal SRAM (2x16KB), 64KB internal ROM, and an External Bus Interface (EBI) supporting SDRAM, static memory, ECC-enabled NAND Flash, and CompactFlash for flexible memory expansion. As a pin-to-pin compatible evolution of the AT91SAM9260, it offers four times the cache and on-chip SRAM memory, improved error correction for external NAND Flash, and an enlarged Ethernet FIFO, consuming only 80mW in full-power mode with all peripherals active, targeting power-constrained applications requiring high performance.

Key Features
● 32KB instruction + 32KB data cache: Four times the cache of AT91SAM9260 for substantially improved performance
● 2x16KB internal SRAM + 64KB ROM: Single-cycle access at maximum matrix speed for fast code execution
● External Bus Interface (EBI): Supports SDRAM, static memory, ECC-enabled NAND Flash, and CompactFlash
● 10/100 Ethernet MAC: With MII/RMII interface, 128-byte FIFOs, and dedicated DMA channels
● USB 2.0 Full Speed: One Device port plus dual Host ports with on-chip transceivers
● 24 Peripheral DMA channels: Maximizes data throughput between interfaces and memories
● 96 programmable I/O lines: Three 32-bit PIO controllers with input change interrupt and Schmitt trigger inputs
● Rich peripheral set: 4 USARTs, 2 SPI, 1 TWI, 1 SSC, 1 MCI, 6 16-bit timers, 4-channel 10-bit ADC
● Fully featured system controller: Reset controller, shutdown controller, clock management, advanced interrupt controller, watchdog timer, and real-time timer
FAQ

Q: What is the key advantage of the AT91SAM9G20 over the AT91SAM9260?
A: It provides four times the cache and SRAM, twice the clock frequency (400MHz vs 200MHz), half the power consumption, improved NAND Flash ECC, and pin-to-pin compatibility for seamless design migration.
Q: What is the power consumption in full-power mode?
A: Only 80mW with all peripherals turned on, achieved through the efficient 0.9V to 1.1V core voltage and power management controller.
Q: What development support is available?
A: The AT91SAM9G20 Evaluation Kit, extensive third-party tools, and comprehensive Microchip documentation including datasheets, application notes, and reference designs.
Alternative Microprocessor Models
● AT91SAM9G20B-CFU (Microchip Technology): The same ARM926EJ-S processor in a 247-pin TFBGA package providing additional I/O capability for designs requiring more external connections.
● AT91SAM9G20-CU (Microchip Technology): The earlier silicon revision in identical 217-ball LFBGA package offering same core functionality for legacy design continuation.
● AT91SAM9G25-CU (Microchip Technology): A related 400MHz ARM9-based MPU with camera interface, Ethernet MAC, and dual USB host ports offering similar performance with different peripheral mix.
● SAM9X60-CU (Microchip Technology): The newer-generation 600MHz ARM926EJ-S-based successor with improved performance, DDR support, and Linux 4.x compatibility for modern designs.