M42800A Atmel Corporation, M42800A Datasheet - Page 66

• Manufacturer Part Number: M42800A
• Manufacturer: Atmel Corporation

Specifications of M42800A

• Flash (kbytes): 0 Kbytes
• Pin Count: 144
• Max. Operating Frequency: 33 MHz
• Cpu: ARM7TDMI
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 54
• Ext Interrupts: 54
• Usb Speed: No
• Usb Interface: No
• Spi: 2
• Uart: 2
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 8
• Self Program Memory: NO
• External Bus Interface: 1
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 3.3/5.0
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 6
• Output Compare Channels: 6
• Input Capture Channels: 6
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: No

12.13 PMC Clock Generator Mode Register
Register Name:
Access Type:
Offset:
Reset Value:
• PRES: Prescaler Selection
• PLLS: PLL Selection
0 = The PLL A with 5 - 20 MHz output range is selected as PLL source. (Code Label PMC_PLL_A)
• 1 = The PLL B with 20 - 80 MHz output range is selected as PLL source. (Code Label PMC_PLL_B)
Note:
• MCKOSS: Master Clock Output Source Selection
• MCKODS: Master Clock Output Disable (Code Label PMC_MCKO_DIS)
0 = The pin MCKO is driven with the clock selected by MCKOSS.
1 = The pin MCKO is tri-stated.
66
0
0
0
0
1
1
1
1
CSS
31
23
15
–
7
0
0
1
1
This bit can be written only once after the reset. Any write of a different value than this one written the first time has no effect on
the bit.
AT91M42800A
MCKOSS
PRES
0
0
1
1
0
0
1
1
MCKODS
PMC_CGMR
Read/Write
0x20
0x0
30
22
14
–
6
0
1
0
1
0
1
0
1
0
1
0
1
Master Clock Output Source Select
Slow Clock
Master Clock
Master Clock inverted
Master Clock divided by 2
Prescaler Selected
None. The Prescaler is bypassed.
Divide by 2
Divide by 4
Divide by 8
Divide by 16
Divide by 32
Divide by 64
Reserved
29
21
13
–
5
MCKOSS
28
20
12
–
4
PLLCOUNT
MUL
PLLS
27
19
11
–
3
Code Label PMC_PRES
PMC_PRES_NONE
PMC_PRES_DIV2
PMC_PRES_DIV4
PMC_PRES_DIV8
PMC_PRES_DIV16
PMC_PRES_DIV32
PMC_PRES_DIV64
–
Code Label: PMC_MCKOSS
PMC_MCKOSS_SLCK
PMC_MCKOSS_MCK
PMC_MCKOSS_MCKINV
PMC_MCKOSS_MCK_DIV2
26
18
10
2
PRES
MUL
25
17
9
1
1779D–ATARM–14-Apr-06
24
16
8
0