SAM9M10 Atmel Corporation, SAM9M10 Datasheet - Page 95
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SAM9M10
Manufacturer Part Number
SAM9M10
Description
Manufacturer
Atmel Corporation
Datasheets
1.M40800.pdf
(284 pages)
2.SAM9261.pdf
(248 pages)
3.SAM9M10.pdf
(59 pages)
4.SAM9M10.pdf
(1398 pages)
Specifications of SAM9M10
Flash (kbytes)
0 Kbytes
Pin Count
324
Max. Operating Frequency
400 MHz
Cpu
ARM926
Hardware Qtouch Acquisition
No
Max I/o Pins
160
Ext Interrupts
160
Usb Transceiver
3
Usb Speed
Hi-Speed
Usb Interface
Host, Device
Spi
2
Twi (i2c)
2
Uart
5
Lin
4
Ssc
2
Ethernet
1
Sd / Emmc
2
Graphic Lcd
Yes
Video Decoder
Yes
Camera Interface
Yes
Adc Channels
8
Adc Resolution (bits)
10
Adc Speed (ksps)
440
Resistive Touch Screen
Yes
Temp. Sensor
No
Crypto Engine
No
Sram (kbytes)
64
Self Program Memory
NO
External Bus Interface
2
Dram Memory
DDR2/LPDDR, SDRAM/LPSDR
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
Pwm Channels
4
32khz Rtc
Yes
Calibrated Rc Oscillator
No
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ARM DDI 0029G
Because two memory cycles are required, nWAIT is used to stretch the internal
processor clock. nWAIT does not affect the operation of the data latches. Using this
method, data can be taken from memory as word, halfword, or byte at a time and the
memory can have as many wait states as required. In multi-cycle memory accesses,
nWAIT must be held LOW until the final part is latched.
In the example shown in Figure 3-18, the BL[3:0] signals are driven to value
first cycle so that only the latches on D[15:0] are open. BL[3:0] can be driven to value
the latches on D[31:16] are written with the correct data during the second cycle.
BL[3:0] must be held HIGH during store cycles.
Figure 3-19 on page 3-26 shows a halfword load from single-wait state byte wide
memory. In the figure, each memory access takes two cycles:
•
•
and all of the latches opened. This does not affect the operation of the core because
in the first access:
—
—
—
in the second cycle, the byte for D[15:8] is latched so the halfword on D[15:0] is
correctly read from memory. It does not matter that D[31:16] are unknown
because the core only extracts the halfword that it is interested in.
Note
Copyright © 1994-2001. All rights reserved.
BL[3:0] are driven to
the correct data is latched from D[7:0]
unknown data is latched from D[31:8].
D[31:16]
nMREQ
A[31:0]
D[15:0]
BL[3:0]
nWAIT
MCLK
SEQ
APE
0x3
Figure 3-18 Memory access
0xC
Memory Interface
in the
3-25
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