AT91RM9200-CI-002 Atmel, AT91RM9200-CI-002 Datasheet - Page 169

• Manufacturer Part Number: AT91RM9200-CI-002
• Description: IC ARM9 MCU 256 BGA
• Manufacturer: Atmel
• Series: AT91SAMr

Specifications of AT91RM9200-CI-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: 256-BGA
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Data Converters: -

18.6.5.2
Figure 18-21. Write Access with Setup and Hold
Figure 18-22. Write Access with Setup
1768I–ATARM–09-Jul-09
D[15:0]
A[22:0]
NWE
MCK
Write Access
D[15:0]
A[22:0]
NWE
MCK
The write cycle can be divided into a setup, a pulse length and a hold. The setup parameter can
have a value between 1.5 and 7.5 clock cycles, the hold parameter between 0.5 and 7 clock
cycles and the pulse length between 1 and 128 clock cycles by increments of one.
NWR Setup
NWR Setup
Pulse Length
Pulse Length
NWR Hold
AT91RM9200
NWR
Hold
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