SAK-C167CR-4RM

Manufacturer Part NumberSAK-C167CR-4RM
Description16 Bit Single-Chip Microcontroller
ManufacturerInfineon Technologies AG
SAK-C167CR-4RM datasheet
 
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Page 20/74:

Central Processing Unit (CPU)

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Note: When the on-chip CAN Module is to be used the segment address output on
Port 4 must be limited to 4 bits (i.e. A19 … A16) in order to enable the alternate
function of the CAN interface pins. CS lines can be used to increase the total
amount of addressable external memory.

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 C167CR’s instructions can be
executed in just one machine cycle which requires 60 ns at 33 MHz CPU clock. 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’, allows reducing the execution time of
repeatedly performed jumps in a loop from 2 cycles to 1 cycle.
32
ROM
Figure 4
CPU Block Diagram
Data Sheet
CPU
SP
MDH
STKOV
MDL
STKUN
Exec. Unit
Mul/Div-HW
Instr. Ptr.
Bit-Mask Gen
Instr. Reg.
ALU
4-Stage
(16-bit)
Pipeline
Barrel - Shifter
PSW
SYSCON
Context Ptr.
BUSCON 0
BUSCON 1
ADDRSEL 1
BUSCON 2
ADDRSEL 2
BUSCON 3
ADDRSEL 3
BUSCON 4
ADDRSEL 4
Data Page Ptr.
Code Seg. Ptr.
16
C167CR
C167SR
16
Internal
RAM
R15
General
R15
Purpose
Registers
16
R0
V3.2, 2001-07
R0
MCB02147