SAK-C164CM-4EF Infineon Technologies AG, SAK-C164CM-4EF Datasheet - Page 18

• Manufacturer Part Number: SAK-C164CM-4EF
• Description: 16-Bit Single-Chip Microcontrol ler
• Manufacturer: Infineon Technologies AG

Central Processing Unit (CPU)
The main core of the CPU consists of a 4-stage instruction pipeline, a 16-bit arithmetic
and logic unit (ALU) and dedicated SFRs. Additional hardware has been spent for a
separate multiply and divide unit, a bit-mask generator and a barrel shifter.
Based on these hardware provisions, most of the C164CM’s instructions can be
executed in just one machine cycle which requires 2 CPU clocks (4 TCL). For example,
shift and rotate instructions are always processed during one machine cycle
independent of the number of bits to be shifted. All multiple-cycle instructions have been
optimized so that they can be executed very fast as well: branches in 2 cycles, a
16 × 16 bit multiplication in 5 cycles and a 32-/16-bit division in 10 cycles. Another
pipeline optimization, the so-called ‘Jump Cache’, reduces the execution time of
repeatedly performed jumps in a loop from 2 cycles to 1 cycle.
Figure 4
Data Sheet
ROM
CPU Block Diagram
32
Data Page Ptr.
Exec. Unit
Instr. Reg.
SYSCON
Instr. Ptr.
BUSCON 1
BUSCON 0
BUSCON 2
BUSCON 3
BUSCON 4
STKUN
STKOV
PSW
SP
Pipeline
4-Stage
Barrel - Shifter
Bit-Mask Gen
Code Seg. Ptr.
Mul/Div-HW
Context Ptr.
ADDRSEL 1
ADDRSEL 3
ADDRSEL 4
ADDRSEL 2
ALU
MDH
MDL
CPU
14
(16-bit)
Registers
Purpose
General
R15
R0
16
16
V1.0, 2001-05
C164CM
C164SM
Internal
RAM
R15
R0
MCB02147