AT91RM9200-QU-002 Atmel, AT91RM9200-QU-002 Datasheet - Page 96

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

Specifications of AT91RM9200-QU-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
• Processor Series: AT91Rx
• Core: ARM7TDMI
• Data Bus Width: 32 bit
• Data Ram Size: 16 KB
• Interface Type: 2-Wire, EBI, I2S, SPI, UART, USART
• Maximum Clock Frequency: 180 MHz
• Number Of Programmable I/os: 122
• Number Of Timers: 10 bit
• Operating Supply Voltage: 3 V to 3.6 V
• 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, AT91RM9200-EK
• Minimum Operating Temperature: - 40 C
• Eeprom Memory: 0 Bytes
• Input Output: 122
• Interface: EBI/EMI, UART/USART
• Ios: 122
• Memory Type: ROM
• Number Of Bits: 32
• Package Type: 208-pin PQFP
• Programmable Memory: 128K Bytes
• Timers: 3-16-bit
• Voltage, Range: 1.65-1.95 V
• Cpu Family: 91R
• Device Core: ARM920T
• Device Core Size: 32b
• Frequency (max): 180MHz
• Total Internal Ram Size: 16KB
• # I/os (max): 122
• Number Of Timers - General Purpose: 6
• Operating Supply Voltage (typ): 1.8/3.3V
• Operating Supply Voltage (max): 1.95/3.6V
• Operating Supply Voltage (min): 1.65/3V
• Instruction Set Architecture: RISC
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 208
• For Use With: AT91SAM-ICE - EMULATOR FOR AT91 ARM7/ARM9
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

14.2.1.3
14.2.2
14.2.2.1
14.2.2.2
96
AT91RM9200
Using a Service
Service Entry Point
Opening a Service
Overloading a Method
Each AT91 service, except for the ROM Entry Service (see
page
for a service. Even if the functions AT91F_Open_<Service> may be compared with object
constructors, they do not act as constructors in that they initiate the service structure but they do
not allocate it. Thus the customer application must allocate it.
Example
Method pointers in the service structure are initialized to the default methods defined in the
AT91 service. Other fields in the service structure are initialized to default values or with the
arguments of the function AT91F_Open_<Service>.
In summary, an application must know what the service structure is and where the function
AT91F_Open_<Service> is.
The default function AT91F_Open_<Service> may be redefined by the application or com-
prised in an application-defined function.
The entry point to a service is established by initializing the service structure. An open function is
associated with each service structure, except for the ROM Entry Service (see
Entry Service” on page
the user side. Access to the service methods is made via function pointers in the service
structure.
The function AT91F_Open_<service> has at least one argument: a pointer to the service
structure that must be allocated elsewhere. It returns a pointer to the base service structure or a
pointer to this service structure.
The function AT91F_Open_<service> initializes all data members and method pointers. All
function pointers in the service structure are set to the service’s functions.
The advantage of this method is to offer a single entry point for a service. The methods of a ser-
vice are initialized by the open function and each member can be overloaded.
Default methods are defined for all services provided in ROM. These methods may not be
adapted to a project requirement. It is possible to overload default methods by methods defined
in the project.
A m e t h o d i s a p o i n t e r t o a f u n c t i o n . T h i s p o i n t e r i s i n i t i a l i z e d b y t h e f u n c t i o n
AT91F_Open_<Service>. To overload one or several methods in a service, the function
pointer must be updated to the new method.
It is possible to overload just one method of a service or all the methods of a service. In this latter
case, the functionality of the service is user-defined, but still works on the same data structure.
// Allocation of the service structure
AT91S_Pipe pipe;
// Opening of the service
AT91PS_Pipe pPipe = AT91F_OpenPipe(&pipe, …);
99), defines a function named AT91F_Open_<Service>. It is the only entry point defined
99). Thus, only the functions AT91F_Open_<service> are visible from
14.3.2 “ROM Entry Service” on
1768I–ATARM–09-Jul-09
14.3.2 “ROM