M166 Datasheet, PDF (68/127 Pages) Siemens Semiconductor Group – C16x Family of Siemens 16-Bit CMOS Single-Chip Microcontrollers

30Mar98@15:00h
C166 Family Instruction Set
Instruction Description
EXTR
Begin EXTended Register Sequence
EXTR
Syntax
Operation
Description
Note
EXTR
op1
(count) ← (op1) [1 ≤ op1 ≤ 4]
Disable interrupts and Class A traps
SFR_range = Extended
DO WHILE ((count) ≠ 0 AND Class_B_trap_condition ≠ TRUE)
Next Instruction
(count) ← (count) - 1
END WHILE
(count) = 0
SFR_range = Standard
Enable interrupts and traps
Causes all SFR or SFR bit accesses via the ’reg’, ’bitoff’ or ’bitaddr’
addressing modes being made to the Extended SFR space for a specified
number of instructions. During their execution, both standard and PEC
interrupts and class A hardware traps are locked.
The value of op1 defines the length of the effected instruction sequence.
The EXTR instruction must be used carefully (see introductory note).
The EXTR instruction is not available in the SAB 8XC166(W) devices.
Condition Flags
E
Z
V
C
N
-
-
-
-
-
Addressing Modes
E Not affected.
Z Not affected.
V Not affected.
C Not affected.
N Not affected.
Mnemonic
EXTR
#irang2
Format
D1 :10##-0
Bytes
2
Semiconductor Group
68
Version 1.2, 12.97