FUTABA RS204MD, Instruction Manual, Page: 28 / 55

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Memory Map
4.1. Invariable ROM Area
Table 4.5 Invariable ROM Area
Area
Address
DEC HEX
Initial Name R/W
Invariable
00 00H 40H Model Number L R
01 01H 20H Model Number H R
02 02H 03H Firmware Version R
03 03H -- Reserved -
●
No.0/No.1 Model Number(2 Byte, Hex, Read)
It is the Model Number (Name of the servo).
“20 40” means RS”204”MD
Model Number L = 40H
Model Number H = 20H
●
No.2 Firmware Version(1Byte, Hex, Read)
It is the version of the servo’s firmware.
Its value is depending on the version at production (0x03 in the example below).
Firmware Version = 03H
※
Saving 2-Byte data
Two-byte data is stored to the memory map in two individual 8-bit bytes of H (High byte) and L (Low
byte).
Ex) Set Angle to 29.2 degrees to servo (ID:23)
Target angle is stored in “Goal Position” (Address 30/31) with unit of 0.1 degrees.
(29.2 [degrees] = 292 [0.1degrees, DEC] = 0124[0.1degrees, HEX])
Stored data is below :
Goal Position (L) = 24H
Goal Position (H) = 01H