AT91SAM7S128C-MU Atmel, AT91SAM7S128C-MU Datasheet - Page 210

• Manufacturer Part Number: AT91SAM7S128C-MU
• Description: IC MCU ARM7 128K FLASH 64-QFN
• Manufacturer: Atmel
• Series: AT91SAMr

Specifications of AT91SAM7S128C-MU

• Core Processor: ARM7
• Core Size: 16/32-Bit
• Speed: 55MHz
• Connectivity: I²C, SPI, SSC, UART/USART, USB
• Peripherals: Brown-out Detect/Reset, DMA, POR, PWM, WDT
• Number Of I /o: 32
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Ram Size: 32K x 8
• Voltage - Supply (vcc/vdd): 1.65 V ~ 1.95 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-VQFN Exposed Pad, 64-HVQFN, 64-SQFN, 64-DHVQFN
• Core: ARM7TDMI
• For Use With: AT91SAM-ICE - EMULATOR FOR AT91 ARM7/ARM9AT91SAM7S-EK - KIT EVAL FOR ARM AT91SAM7S
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details
• Other names: AT91SAM7S128-MU; AT91SAM7S128-MU

25.9.11
Register Name:
Access Type:
• CSS: Master Clock Selection
• PRES: Programmable Clock Prescaler
210
31
23
15
–
–
–
7
–
AT91SAM7S Series Preliminary
PMC Programmable Clock Register
0
0
0
0
1
1
1
1
0
0
1
1
30
22
14
PMC_PCKx
Read-write
–
–
–
6
–
CSS
29
21
13
–
–
–
5
–
PRES
0
0
1
1
0
0
1
1
0
1
0
1
28
20
12
–
–
–
4
Clock Source Selection
Slow Clock is selected
Main Clock is selected
Reserved
PLL Clock is selected
PRES
27
19
11
–
–
–
3
0
1
0
1
0
1
0
1
26
18
10
–
–
–
2
Programmable 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
25
17
–
–
–
9
1
6175K–ATARM–30-Aug-10
CSS
24
16
–
–
8
–
0