Memory Map; Invariable Rom Area; No.0 /No.1 Model Number; No.2 Firmware Version - FUTABA RS301CR Instruction Manual

●Invariable ROM area
Adress No.
Area
DEC
00
Invariable 01
ROM
02
03
●No.0 / No.1 Model Number(2Bytes, Hex Number, Read Only)
This field represents the model No. (servo model). For the RS301CR, it is:
Model Number L
Model Number H
For RS302CD, they are as follows.
Model Number L
Model Number H
●No.2 Firmware Version(1Byte, Hex Number, Read Only)
This field represents the servo firmware version. Its value varies depending on the
version at production (0x01 in the example below).
Firmware Version
※ Storing two-byte data to memory map
Two-byte data is stored to the memory map in two individual 8-bit bytes of H (High byte)
and L (Low byte).
Ex.) Issue a 29.2 degrees operation command to servo ID=23.
The command angle is saved to the Target Position item. The commanded value is 29.2
degrees, but since this is 0x0124 in hexadecimal notation, the data actually stored is:
Target Position(L) = 24H
Target Position(H) = 01H

Memory Map

Table 4.4 Invariable ROM area
Initial
HEX value
00H 10H(20H)
01H 30H
02H 01H
03H 00H
= 10H
= 30H
= 20H
= 30H
= 01H
Name
Model Number L
Model Number H
Firmware Version
Reserved
17
Property
R
R
R
-
( ) For RS302CD