st10f269z1 STMicroelectronics, st10f269z1 Datasheet - Page 37

• Manufacturer Part Number: st10f269z1
• Description: St10f269 16-bit Mcu With Mac Unit, 256k Byte Flash Memory And 12k Byte Ram
• Manufacturer: STMicroelectronics

ST10F269
6.1.1 - Features
6.1.1.1 - Enhanced Addressing Capabilities
– New addressing modes including a double indi-
– Parallel Data Move: this mechanism allows one
– New transfer instructions CoSTORE (for fast ac-
6.1.1.2 - Multiply-Accumulate Unit
– One-cycle execution for all MAC operations.
Figure 10 : MAC Unit Architecture
Note: * Shared with standard ALU.
rect addressing mode with pointer post-modifi-
cation.
operand move during Multiply-Accumulate in-
structions without penalty.
cess to the MAC SFRs) and CoMOV (for fast
memory to memory table transfer).
Controller
ST10 CPU
Interrupt
GPR Pointers *
IDX0 Pointer
IDX1 Pointer
QR0 GPR Offset Register
QR1 GPR Offset Register
QX0 IDX Offset Register
QX1 IDX Offset Register
Repeat Unit
MRW
Control Unit
MCW
Concatenation
– 16 x 16-bit signed/unsigned parallel multiplier.
– 40-bit signed arithmetic unit with automatic sat-
– 40-bit accumulator.
– 8-bit left/right shifter.
– Full instruction set with multiply and multiply-ac-
6.1.1.3 - Program Control
– Repeat Unit: allows some MAC co-processor in-
– MAC interrupt (Class B Trap) on MAC condition
6 - CENTRAL PROCESSING UNIT (CPU)
MSW
uration mode.
cumulate, 32-bit signed arithmetic and compare
instructions.
structions to be repeated up to 8192 times. Re-
peated instructions may be interrupted.
flags.
Flags MAE
32
40
0h
Sign Extend
Operand 1
Scaler
40
40
Mux
Mux
40-bit Signed Arithmetic Unit
A
signed/unsigned
16
40
08000h
Multiplier
16 x 16
32
MAH
8-bit Left/Right
16
40
40
Shifter
Operand 2
40
0h
MAL
40
Mux
B
40
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