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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 AT91SAM7L-series
datasheet at www.atmel.com.
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
PDCPDC
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
- User Guide 1
- Table of Contents (Continued) 4
- Section 1 5
- Overview 5
- Power Supply 6
- CD ROM 6
- 1.1.3 Board Specification 8
- Section 2 9
- 6414A–ATARM–12-Sep-08 10
- Section 3 11
- Development Tools 11
- 3.4 SAM-ICE 12
- 3.5 SAM-BA 13
- Section 4 15
- Board Description 15
- 4.4 Processor 18
- 4.3 Overview 18
- 4.5 Memory 19
- 4.6 Clock Circuitry 19
- 4.9 DBGU 23
- 4.10 JTAG/ICE 23
- 4.11 Segment LCD 24
- 4.12 User Buttons 25
- 4.13 ZigBee 26
- 4.14 PIO Expansion 27
- 4.15 User Grids 27
- Section 5 28
- Configuration 28
- Table 5-1. PIO Controller A 29
- Table 5-2. PIO Controller B 30
- Table 5-3. PIO Controller C 31
- 5.2 Jumpers 32
- 5.3 Test Points 32
- 5.4 Solder Drops 33
- Section 6 34
- Schematics 34
- AT91SAM7L-STK 35
- AT91SAM7L-LQFP128 38
- Section 7 39
- Revision History 39
- Headquarters International 40
- Product Contact 40
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