ZiLOG Z8 Series User Manual

Z8
®
CPU
User Manual
UM001604-0108 Instruction Description
230
group of 16 registers. Registers F0h to FFh can be accessed as Working Registers R0 to
R15.
Example 3
The statement:
SRP 0Fh
Op Code: 31 0F
sets the Register Pointer to access Expanded Register Bank F, Reg ← to Reg 0Fh, as the
current Working Registers. All references to Working Registers now affect this group of
16 registers. These registers are now accessed as Working Registers R0 to R15. Port Reg-
isters are now not accessable.
Example 4
Assume the RP currently addresses the Control and Peripheral Working Register Group
and the program has just entered an interrupt service routine. The statement:
SRP 70h
Op Code: 31 70
retains the contents of the Control and Peripheral Registers by setting the RP to 70h
(
01110000b). Any reference to Working Registers in the interrupt routine points to regis-
ters
70h to 7Fh.

ZiLOG Z8 Series Specifications

General

Brand	ZiLOG
Model	Z8 Series
Category	Microcontrollers
Language	English