SAM9G20 Atmel Corporation, SAM9G20 Datasheet - Page 40

• Manufacturer Part Number: SAM9G20
• Manufacturer: Atmel Corporation

Specifications of SAM9G20

• Flash (kbytes): 0 Kbytes
• Pin Count: 217
• Max. Operating Frequency: 400 MHz
• Cpu: ARM926
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 96
• Ext Interrupts: 96
• Usb Transceiver: 3
• Usb Speed: Full Speed
• Usb Interface: Host, Device
• Spi: 2
• Twi (i2c): 1
• Uart: 7
• Ssc: 1
• Ethernet: 1
• Sd / Emmc: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: Yes
• Adc Channels: 4
• Adc Resolution (bits): 10
• Adc Speed (ksps): 95
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 32
• Self Program Memory: NO
• External Bus Interface: 1
• Dram Memory: sdram
• Nand Interface: Yes
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 1.8/3.3
• Operating Voltage (vcc): 0.9 to 1.1
• Fpu: No
• Mpu / Mmu: No/Yes
• Timers: 6
• Output Compare Channels: 6
• Input Capture Channels: 6
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: No

Programmer’s Model
2.3.2
2-12
Control Register c1
31
TCM Status Register c0
This is a read-only register that enables operating systems to establish if TCM memories
are present. See also TCM Region Register c9 on page 2-29.
You can access the TCM Status Register by reading CP15 register c0 with the Opcode_2
field set to 2. For example:
The format of the TCM Status Register is shown in Figure 2-4.
Register c1 is the Control Register for the ARM926EJ-S processor. This register
specifies the configuration used to enable and disable the caches and MMU. It is
recommended that you access this register using a read-modify-write sequence.
For both reading and writing, the CRm and Opcode_2 fields Should Be Zero. To read
and write this register, use the instructions:
Function
Isize
Copyright © 2001-2003 ARM Limited. All rights reserved.
SBZ/UNP
Reserved
Size
Assoc
M
Len
Table 2-10 Example Cache Type Register format (continued)
Register bits
[11:10]
[9:6]
[5:3]
[2]
[1:0]
17 16 15
present
DTCM
Figure 2-4 TCM Status Register format
Value
b00
b0101 = 16KB
b010 = 4-way
b0
b10 = 8 words per line (32 bytes)
SBZ/UNP
ARM DDI0198D
1 0
present
ITCM