AT91SAM7A1-AU Atmel, AT91SAM7A1-AU Datasheet - Page 69

• Manufacturer Part Number: AT91SAM7A1-AU
• Description: IC ARM7 MCU 32BIT ROMLESS144LQFP
• Manufacturer: Atmel
• Series: AT91SAMr

Specifications of AT91SAM7A1-AU

• Core Processor: ARM7
• Core Size: 16/32-Bit
• Speed: 40MHz
• Connectivity: CAN, EBI/EMI, SPI, UART/USART
• Peripherals: POR, PWM, WDT
• Number Of I /o: 49
• Program Memory Type: ROMless
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 144-LQFP
• For Use With: AT91SAM7A1-EK - BOARD EVAL FOR AT91SAM7A1
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -

11.1.7
Name:
Access:
Address:
• MDIV[6:0]: Master Clock Divider
MDIV[6:0] is used to divide the MCK clock and generate the DIVCLK. Default value for MDIV[6:0] is 0x1F.
• MDIVKEY[15:0]: Key for Write Access into the CM_MDIV Register
Any write in the MDIV[6:0] bits is effective only if the MDIVKEY[15:0] bits are equal to 0xACDC. These bits are always read
at 0.
6048B–ATARM–29-Jun-06
31
23
15
–
7
–
CM Master Clock Divider Register
CM_MDIV
Read/Write
0xFFFEC018
DIVCLK
30
22
14
–
6
=
--------------------------------------------------- -
2
MDIV[6:0]
MCK
29
21
13
–
5
+
1
28
20
12
–
4
MDIVKEY[15:8]
MDIVKEY[7:0]
MDIV[6:0]
27
19
11
–
3
26
18
10
–
2
AT91SAM7A1
25
17
9
–
1
24
16
8
–
0
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