AT91RM9200-QI-002 Atmel, AT91RM9200-QI-002 Datasheet - Page 95

• Manufacturer Part Number: AT91RM9200-QI-002
• Description: IC ARM9 MCU 208 PQFP
• Manufacturer: Atmel
• Series: AT91SAMr

Specifications of AT91RM9200-QI-002

• Core Processor: ARM9
• Core Size: 16/32-Bit
• Speed: 180MHz
• Connectivity: EBI/EMI, Ethernet, I²C, MMC, SPI, SSC, UART/USART, USB
• Peripherals: POR
• Number Of I /o: 122
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: ROM
• Ram Size: 48K x 8
• Voltage - Supply (vcc/vdd): 1.65 V ~ 1.95 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 208-MQFP, 208-PQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Data Converters: -

14. Embedded Software Services
14.1
14.2
14.2.1
14.2.1.1
14.2.1.2
1768I–ATARM–09-Jul-09
Overview
Service Definition
Service Structure
Structure Definition
Methods
An embedded software service is an independent software object that drives device resources
for frequently implemented tasks. The object-oriented approach of the software provides an
easy way to access services to build applications.
An AT91 service has several purposes:
The main features of the software services are:
A service structure is defined in C header files.
This structure is composed of data members and pointers to functions (methods) and is similar
to a class definition. There is no protection of data access or methods access. However, some
functions can be used by the customer application or other services and so be considered as
public methods. Similarly, other functions are not invoked by them. They can be considered as
private methods. This is also valid for data.
In the service structure, pointers to functions are supposed to be initialized by default to the stan-
dard functions. Only the default standard functions reside in ROM. Default methods can be
overloaded by custom application methods.
Methods do not declare any static variables nor invoke global variables. All methods are invoked
with a pointer to the service structure. A method can access and update service data without
restrictions.
Similarly, there is no polling in the methods. In fact, there is a method to start the functionality (a
read to give an example), a method to get the status (is the read achieved?), and a callback, ini-
tialized by the start method. Thus, using service, the client application carries out a synchronous
read by starting the read and polling the status, or an asynchronous read specifying a callback
when starting the read operation.
• It gives software examples dedicated to the AT91 devices.
• It can be used on several AT91 device families.
• It offers an interface to the software stored in the ROM.
• Compliant with ATPCS
• Compliant with ANSI/ISO Standard C
• Compiled in ARM/Thumb Interworking
• ROM Entry Service
• Tempo, Xmodem and DataFlash services
• CRC and Sine tables
AT91RM9200
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