Panasonic MN103001G/F01K - Manual (Page 58)

Extension Instruction Specifications
3-2
3.1 Operation Extension Function
The MN1030 series 32-bit microcontrollers are provided with 32 extension instructions which can be defined by
users. This allows the desired processing to be performed at high speed for each model expansion by assigning
multiply, multiply-accumulate, saturation and other application-oriented operations to extension instructions and
connecting extension function unit via the extension operation interface of the CPU core.
Extension instructions include instructions UDF00 to UDF15 which transfer register or immediate values to the
extension function unit and load the operation results to the data register, and instructions UDF20 to UDF35 which
only transfer register to the extension function unit. Processing which performs user-defined operations is assigned
to instructions UDF00 to UDF15, and processing which only transfers data to the extension function unit is assigned
to instructions UDF20 to UDF35. Extension operations which require three or more inputs can be realized by
transferring the input data to the extension function unit beforehand using instructions UDF20 to UDF35 and then
performing the operation using instructions UDF00 to UDF15.
The block diagram showing extension function unit connected to the CPU for this series is as follows.
This microcontroller has a 32 x 16 multiplier, priority encoder, and saturation compensation unit on chip. The
extension functions that use the extension function unit are explained in section 3.2, "Extension Instructions."
Fig. 3-1-1 Block Diagram of the Extension Function Unit
......
......
......
Operation
extension block B
Operation
extension block A
User
extension
instruction
decoder B
User
extension
instruction
decoder A
User extension
function unit
B
User extension
function unit
A
AU LU
CPU
instruction
decoder
Instruc-
tion
queue
Instruction decoding
block
Barrel
shifter
Program
counter
block
Register
Operand address
Instruction
address
Operand data
Instruction
data
Operation extension interface