M55800A Atmel Corporation, M55800A Datasheet - Page 118

• 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

USART Baud Rate Generator Register
Name:
Access Type:Read/Write
Reset Value: 0
Offset:
• CD: Clock Divisor
This register has no effect if Synchronous Mode is selected with an external clock.
Notes:
118
2 to 65535
31
23
15
–
–
7
1. Clock divisor bypass (CD = 1) must not be used when internal clock MCK is selected (USCLKS = 0).
2. In Synchronous Mode, the value programmed must be even to ensure a 50:50 mark:space ratio.
CD
0
1
AT91X40 Series
US_BRGR
0x20
Effect
Disables Clock
Clock Divisor Bypass
Baud Rate (Asynchronous Mode) = Selected Clock / (16 x CD)
Baud Rate (Synchronous Mode) = Selected Clock / CD
30
22
14
–
–
6
29
21
13
–
–
5
(1)
28
20
12
–
–
4
CD
CD
27
19
11
–
–
3
(2)
26
18
10
–
–
2
25
17
–
–
9
1
1354D–ATARM–08/02
24
16
–
–
8
0