SABC504 Просмотр технического описания (PDF) - Infineon Technologies

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SABC504

8-Bit Single-Chip Microcontroller

Infineon Technologies 

C504

CPU

The C504 is efficient both as a controller and as an arithmetic processor. It has extensive

facilities for binary and BCD arithmetic and excels in its bit-handling capabilities. Efficient

use of program memory results from an instruction set consisting of 44% one-byte, 41%

two-byte, and 15% three-byte instructions. With a 12 MHz crystal, 58% of the instructions

are executed in 1.0 µs (24 MHz: 500 ns, 40 MHz: 300 ns).

Special Function Register PSW (Address D0H)

Reset Value: 00H

Bit No. MSB

LSB

D7H D6H D5H D4H D3H D2H D1H D0H

D0H

CY

AC

F0 RS1 RS0 OV

F1

P PSW

Bit

Function

CY

Carry Flag

Used by arithmetic instructions.

AC

Auxiliary Carry Flag

Used by instructions which execute BCD operations.

F0

General Purpose Flag 0

RS1

Register Bank Select Control bits

RS0

These bits are used to select one of the four register banks.

RS1 RS0 Function

0

0

Bank 0 selected, data address 00H-07H

0

1

Bank 1 selected, data address 08H-0FH

1

0

Bank 2 selected, data address 10H-17H

1

1

Bank 3 selected, data address 18H-1FH

OV

Overflow Flag

Used by arithmetic instruction.

F1

General Purpose Flag 1

P

Parity Flag

Set/cleared by hardware after each instruction to indicate an odd/

even number of “one” bits in the accumulator.

Data Sheet

11

2000-05

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