M55800A Atmel Corporation, M55800A Datasheet - Page 66

• Manufacturer Part Number: M55800A
• Manufacturer: Atmel Corporation

Specifications of M55800A

• Flash (kbytes): 0 Kbytes
• Pin Count: 176
• Max. Operating Frequency: 33 MHz
• Cpu: ARM7TDMI
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 58
• Ext Interrupts: 58
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Uart: 3
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• Adc Resolution (bits): 10
• Adc Speed (ksps): 72
• Resistive Touch Screen: No
• Dac Channels: 1
• Dac Resolution (bits): 10
• 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

12.9.7
Register Name:
Access Type:
Reset Value:
Offset:
• MOSCBYP: Main Oscillator Bypass (Code Label APMC_MOSC_BYP)
0 = Crystal must be connected between XIN and XOUT.
1 = External clock must be provided on XIN.
• MOSCEN: Main Oscillator Enable (Code Label APMC_MOSC_EN)
0 = Main Oscillator is disabled.
1 = Main Oscillator is enabled.
Note:
• MCKODS: Master Clock Output Disable (Code Label APMC_MCKO_DIS)
0 = The MCKO pin is driven with the Master Clock (MCK).
1 = The MCKO pin is tri-stated.
• PRES: Prescaler Selection
66
0
0
0
0
1
1
1
1
31
23
15
–
7
–
When operating in Bypass Mode, the Main Oscillator must be disabled. MOSCEN and MOSCBYP bits must never be set
together.
AT91M5880A
APMC Clock Generator Mode Register
CSS
PRES
0
0
1
1
0
0
1
1
30
22
14
APMC_CGMR
Read/Write
0x0
0x20
–
6
0
1
0
1
0
1
0
1
PRES
Prescaler Selected
None. Prescaler Output is the selected clock.
Selected clock is divided by 2
Selected clock is divided by 4
Selected clock is divided by 8
Selected clock is divided by 16
Selected clock is divided by 32
Selected clock is divided by 64
Reserved
29
21
13
5
28
20
12
4
OSCOUNT
27
19
11
–
3
PLLCOUNT
MUL
MCKODS
26
18
10
2
Code Label
APMC_PRES_NONE
APMC_PRES_DIV2
APMC_PRES_DIV4
APMC_PRES_DIV8
APMC_PRES_DIV16
APMC_PRES_DIV32
APMC_PRES_DIV64
–
MOSCEN
25
17
9
1
1745F–ATARM–06-Sep-07
MOSCBYP
24
16
8
0