AT91RM9200-CI-002 Atmel, AT91RM9200-CI-002 Datasheet - Page 287

• 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: -

23.6.11
Register Name:
Access Type:
Note: Value to be written in PMC_MCKR must not be the same as current value in PMC_MCKR.
• CSS: Master Clock Selection
• PRES: Master Clock Prescaler
• MDIV: Master Clock Division (on ARM9-based systems only)
0 = The Master Clock and the Processor Clock are the same.
1 = The Processor Clock is twice as fast as the Master Clock.
2 = The Processor Clock is three times faster than the Master Clock.
3 = The Processor Clock is four times faster than the Master Clock.
1768I–ATARM–09-Jul-09
31
23
15
–
–
–
7
–
PMC Master Clock Register
0
0
0
0
1
1
1
1
0
0
1
1
30
22
14
PMC_MCKR
Read/Write
–
–
–
6
–
29
21
13
–
–
–
5
PRES
CSS
0
0
1
1
0
0
1
1
28
20
12
–
–
–
4
0
1
0
1
PRES
0
1
0
1
0
1
0
1
27
19
11
–
–
–
3
Clock Source Selection
Slow Clock is selected
Main Clock is selected
PLL A Clock is selected
PLL B Clock is selected
Master Clock
Selected clock
Selected clock divided by 2
Selected clock divided by 4
Selected clock divided by 8
Selected clock divided by 16
Selected clock divided by 32
Selected clock divided by 64
Reserved
26
18
10
–
–
–
2
AT91RM9200
25
17
–
–
9
1
MDIV
CSS
24
16
–
–
8
0
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