The new Robotis open source servo control board will be out soon. It is the replacement for the CM-900. The improvements are in price from 20 to 10 dollars USD, smaller size and doubling of the amount of flash memory.
Link to the CM-900 and soon to be CM-9.04 website.
CM-9.04
|
CM-900
|
|
CPU
|
STM32F103CB (ARM Cortex-M3)
|
STM32F103C8 (ARM Cortex-M3)
|
Op Voltage
|
5V~16V( USB 5V, DXL 12V, 7.4V)
|
5V~35V( USB 5V, DXL 12V, 7.4V)
|
I/O
|
GPIO 28
|
GPIO 32
|
Timer
|
8
|
8
|
Analog In(ADC)
|
10(12bit)
|
10(12bit)
|
Analog Out(DAC)
|
X
|
X
|
Flash
|
128 Kbytes
|
64 Kbytes
|
SRAM
|
20 Kbytes
|
20 Kbytes
|
Clock
|
72Mhz(9 X 8Mhz)
|
72Mhz(9 X 8Mhz)
|
USB
|
1(2.0 FS)
|
1(2.0 FS)
|
CAN
|
1
|
1
|
USART
|
3
|
3
|
SPI
|
2
|
2
|
I2C(TWI)
|
2
|
2
|
Debug
|
JTAG & SWD
|
JTAG & SWD
|
DMA
|
7ch
|
7ch
|
3 Pin TTL
|
4(AX12 Compatible 3Pin)
|
2
|
4 Pin RS485
|
X
|
2
|
Mini 3Pin TTL
|
4(AX12 Compatible 3Pin)
|
1
|
External ADC Ref
|
YES
|
NO
|
DC Jack
|
NO
|
YES
|
S/W
|
ROBOTIS CM9
|
ROBOTIS CM9
|
SIZE
|
27mm X 66.5 mm
|
60mm X 54 mm
|
Price
|
Around 10$
|
Around 20$
|
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