AT91SAM7L128-CU Atmel, AT91SAM7L128-CU Datasheet - Page 16
AT91SAM7L128-CU
Manufacturer Part Number
AT91SAM7L128-CU
Description
MCU ARM7 128K HS FLASH 144-LFBGA
Manufacturer
Atmel
Series
AT91SAMr
Datasheet
1.AT91SAM7L64-CU.pdf
(564 pages)
Specifications of AT91SAM7L128-CU
Core Processor
ARM7
Core Size
16/32-Bit
Speed
36MHz
Connectivity
I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, LCD, POR, PWM, WDT
Number Of I /o
80
Program Memory Size
128KB (128K x 8)
Program Memory Type
FLASH
Ram Size
6K x 8
Voltage - Supply (vcc/vdd)
1.55 V ~ 1.8 V
Data Converters
A/D 4x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
144-LFBGA
Processor Series
AT91SAMx
Core
ARM7TDMI
Data Bus Width
32 bit
Data Ram Size
6 KB
Interface Type
2-Wire, SPI, USART
Maximum Clock Frequency
36 MHz
Number Of Programmable I/os
80
Number Of Timers
3
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
3rd Party Development Tools
JTRACE-ARM-2M, MDK-ARM, RL-ARM, ULINK2
Development Tools By Supplier
AT91SAM-ICE, AT91-ISP, AT91SAM7L-EK
Minimum Operating Temperature
- 40 C
On-chip Adc
10 bit, 4 Channel
For Use With
AT91SAM7L-STK - KIT EVAL FOR AT91SAM7LAT91SAM-ICE - EMULATOR FOR AT91 ARM7/ARM9
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Lead Free Status / Rohs Status
Details
Available stocks
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Part Number
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Quantity
Price
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Part Number:
AT91SAM7L128-CU
Manufacturer:
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Quantity:
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5.6
16
LCD Power Supply
AT91SAM7L128/64 Preliminary
Adequate input supply decoupling is mandatory for VDDIO1 in order to improve startup stability
and reduce source voltage drop. The input decoupling capacitor should be placed close to the
chip. For example, two capacitors can be used in parallel, 100 nF NPO and 4.7 µF X7R.
The AT91SAM7L128/64 embeds an on-chip LCD power supply comprising a regulated charge
pump and an adjustable voltage regulator.
The regulated charge pump output delivers 3.6V as long as its input is supplied between 1.8V
and 3.6V. The regulated charge pump only requires two external flying capacitors and one exter-
nal tank capacitor to operate.
Adequate input supply decoupling is mandatory for VDDINLCD in order to improve startup sta-
bility and reduce source voltage drop. The input decoupling capacitor should be placed close to
the chip.
Current consumption of the charge pump and LCD bias when active is 350 µA (max case).
The regulated charge pump can be used to supply the LCD voltage regulator or as a 3.6V volt-
age reference delivering up to 4 mA.
The LCD voltage regulator output voltage is software selectable from 2.4V to 3.4V with 16 lev-
els. Its input should be supplied in the range of 2.5 to 3.6V. The LCD voltage regulator can be
supplied by the regulated charge pump output or by an external supply.
When the LCD voltage regulator is not used, its output must be connected to an external source
in order to supply the PIOA and PIOB I/O lines.
Figure 5-3
Figure 5-3.
below shows the typical schematics needed:
External supply
The Charge Pump Supplies the LCD Regulator
R = 10
VDDINLCD
VDDLCD
VDD3V6
VDDIO2
Regulator
Voltage
Charge
Pump
LCD
CAPP1
CAPM1
CAPP2
CAPM2
6257A–ATARM–20-Feb-08
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