概述
myc-sam9x25 核心板是深圳市米尔科技有限公司推出，基于 atmel at91sam9x25 处理器的 arm9 核心板，该款产品属于 myc-sam9x5 系列核心板中的一款。
myc-sam9x25 核心板正面图：
图1 myc-sam9x25 核心板
myc-sam9x25 核心板背面图：
图2 myc-sam9x25 核心板背面图
关于 myc-sam9x25 核心板软硬件资源，请查看 myc-sam9x5 系列核心板 中的详细介绍。
chip introduction
a high-performance arm926-based embedded microprocessor unit, running at 400mhz and featuring multiple networking/connectivity peripherals, including two 2.0a/b compatible controller area network (can) interfaces and two ieee std 802.3-compatible 10/100mbps ethernet macs. additional communication interfaces include a soft modem, hs usb device and host, fs usb host, two hs sdcard/sdio/mmc interfaces, usarts, spis, i2s, multiple twis and 10-bit adc. the sam9x25 offers a multi-layer bus matrix coupled with 2 x 8 central dma channels and dedicated dmas for the high-speed connectivity peripherals. the external bus interface incorporates controllers for sdram/lpsdram, ddr2/lpddr and specific circuitry for mlc/slc nand flash with integrated ecc. the sam9x25 is available in a 217-ball bga package with 0.8mm ball pitch.
cpu logic diagram
key parameters
for sam9x25
|
parameter |
value |
|
flash（kbytes） |
0 |
|
pin count |
217 |
|
max. operating frequency |
400 mhz |
|
cpu |
arm926 |
|
hardware qtouch acquisition |
no |
|
max i/o pins |
105 |
|
ext interrupts |
105 |
|
usb transceiver |
3 |
|
quadrature decoder channels |
0 |
|
usb speed |
hi-speed |
|
usb interface |
host, device |
|
spi |
2 |
|
twi (i2c) |
3 |
|
uart |
7 |
|
can |
2 |
|
lin |
4 |
|
ssc |
1 |
|
ethernet |
2 |
|
sd/emmc |
2 |
|
segment lcd |
0 |
|
graphic lcd |
no |
|
video decoder |
no |
|
adc channels |
12 |
|
adc resolution (bits) |
10 |
|
adc speed (ksps) |
440 |
|
analog comparators |
0 |
|
resistive touch screen |
no |
|
dac channels |
0 |
|
dac resolution (bits) |
0 |
|
temp. sensor |
no |
|
crypto engine |
no |
|
sram (kbytes) |
32 |
|
eeprom (bytes) |
0 |
|
self program memory |
no |
|
external bus interface |
1 |
|
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 |