Memory allocation, Ft 3120 smart transceiver, Ft 3150 smart transceiver – Echelon FT 3150 Smart Transceiver User Manual
Page 19
FT 3120 / FT 3150 Smart Transceiver Data Book
13
Memory Allocation
Table 2.5 ALU Instructions
Memory Allocation
FT 3120 Smart Transceiver
See Figure 2.6 for a memory map of the FT 3120 Smart Transceiver.
•
4,096 bytes of in-circuit programmable EEPROM that store:
— Network configuration and addressing information.
— Unique 48-bit Neuron ID (written at the factory).
— User-written application code and read-mostly data.
•
2,048 bytes of static RAM that store the following:
— Stack segment, application, and system data.
— Network buffers and application buffers.
•
12,288 bytes of ROM that store the following:
— The Neuron firmware, including the system firmware executed by the MAC and network processors, and
the executive supporting the application program.
FT 3150 Smart Transceiver
See Figure 2.5 for a memory map of the FT 3150 Smart Transceiver.
•
512 bytes of in-circuit programmable EEPROM that store the following:
— Network configuration and addressing information.
POPD [PTR]
6
1
Pop to 16-bit pointer [0 to 3], low byte first
PUSH/POP [PTR][TOS]
6
1
EA = (16-bit pointer) + TOS
PUSH/POP [PTR][D]
7
2
EA = (16-bit pointer) + displacement [0 to 255]
PUSH/POP absolute
7
3
Absolute memory address
IN/OUT
7 + 4n
1
Fast I/O instruction, transfer n bytes
Mnemonic
Cycles
Size (bytes)
Operation
INC/DEC/NOT
2
1
Increment/decrement/negate TOS
ROLC/RORC
2
1
Rotate left/right TOS through carry
SHL/SHR
2
1
Unsigned left/right shift TOS, clear carry
SHLA/SHRA
2
1
Signed left/right shift TOS into carry
ADD/AND/OR/XOR/ADC
4
1
Operate with NEXT on TOS, drop NEXT
ADD/AND/OR/XOR #literal
3
2
Operate with literal on TOS
(ADD/AND/OR/XOR)_R
7
1
Operate with NEXT on TOS, drop NEXT and
return
ALLOC #literal
3
1
Add [1 to 8] to data stack pointer
DEALLOC_R #literal
6
1
Subtract [1 to 8] from data stack pointer and return
SUB NEXT,TOS
4
1
TOS = NEXT - TOS, drop NEXT
SBC NEXT, TOS
4
1
TOS = NEXT - TOS - carry, drop NEXT
SUB TOS,NEXT
4
1
TOS = TOS - NEXT, drop NEXT
XCH
4
1
Exchange TOS and NEXT
INC [PTR]
6
1
Increment 16-bit pointer [0 to 3]