3 overview, 4 processor, Overview -4 – Atmel AT91SAM7L-STK User Manual
Page 18: Processor -4
Board Description
4-4
AT91SAM7L-STK Rev. B Starter Kit User Guide
6414A–ATARM–12-Sep-08
4.3
Overview
The AT91SAM7L-STK is designed to be a simple starter board for users to evaluate the performance
and functionality of the AT91SAM7L-series microcontroller. Besides the basic system, the board inte-
grates a 400-segments dot matrix LCD, segment LCD control being one of the main attributes of the
AT91SAM7L, along with other low-power features.
4.4
Processor
The AT91SAM7L-STK is equipped with an AT91SAM7L128 microcontroller in a 128 lead LQFP green
package. The AT91SAM7L128 is a low-power ARM7TDMI Thumb-based microcontroller, targeting bat-
tery powered systems. Various aspects contribute to this, such as: wide supply range (1.8V to 3.6V) for
direct battery power, minimum leakage Power-on Reset, brownout detector, multi-mode power supply
controller, adjustable PLL and more. It also provides a fully integrated 400-segments LCD controller,
including drivers and charge pump for contrast control. The chip runs up to 37 MHz at 3.0V supply and
30 MHz at 1.8V supply.
Figure 4-2.
AT91SAM7L Block Diagram
For more information about the AT91SAM7L microcontroller, please refer to the
Backup Unit
User Peripherals
System Peripherals
SRAM
2KB (Backup)
4KB (Core)
ARM7TDMI
APB
Peripheral Bridge
AMBA System Bus
PWM
x4
SPI
TWI
16-bit
Timer
x3
I/O
x80
RC OSC
2MHz
PIT
WDT
DBGU
PMC
AIC
RSTC
PLL
ADC
x4
Flash
64-128kB
ROM
FFPI
SAM-BA Boot
USART
USART
PDC
PDC
PDC
PDC
PDC
1.8V
Voltage
Regulator
PIOA/B/C
Peripheral DMA
Controller: 11 channels
JTAG ICE
JTAG
Boundary Scan
Segment
LCD
Controller
40
segments
X
10
Terminals
BOD
RTC
POR
RC OSC
32kHz
XTAL
32kHz
LCD
Charge
Pump
LCD
Voltage
Regulator
PDC
Supply
Contr
IAP