SDA5250 Datasheet, PDF (47/143 Pages) Siemens Semiconductor Group – TVTEXT 8-Bit Microcontroller

SDA 525x
.. ₂
CDC = 1
Internal
OSC
Chip Clock
.. ₆
Machine Cycles,
Instruction Cycles
CDC = 0
UES05470
Figure 14
CPU-Timing
Note: For CDC see Chapter “Advanced Function Register” on page 115.
6.3.1.3 Addressing Modes
There are five general addressing modes operating on bytes. One of these five
addressing modes, however, operates on both bytes and bits:
– Register
– Direct (both bytes and bits)
– Register indirect
– Immediate
– Base-register plus index-register indirect
The following section summarizes, which memory spaces may be accessed by each of
the addressing modes:
Register Addressing
R0 – R7
ACC, B, CY (bit), DPTR
Direct Addressing
RAM (low part)
Special Function Registers
Register-Indirect Addressing
RAM (@R1, @R0, SP)
Immediate Addressing
Program Memory
Base-Register plus Index-Register Indirect Addressing
Program Memory (@DPTR + A, @PC + A)
Semiconductor Group
47
1998-04-08