Z86E61 Zilog., Z86E61 Datasheet - Page 36

• Manufacturer Part Number: Z86E61
• Description: CMOS Z8 16K/32K EPROM MICROCONTROLLER
• Manufacturer: Zilog.

INSTRUCTION SET NOTATION
Addressing Modes. The following notation is used to
describe the addressing modes and instruction opera-
tions as shown in the instruction summary.
Symbol
IRR
Irr
X
DA
RA
IM
R
r
IR
Ir
RR
Symbols. The following symbols are used in describing
the instruction set.
Symbol
dst
src
cc
@
SP
PC
FLAGS
RP
IMR
36
Meaning
Indirect register pair or indirect working
register pair address
Indirect working register pair only
Indexed address
Direct address
Relative address
Immediate
Register or working register address
Working register address only
Indirect register or indirect
working register address
Indirect working register address only
Register pair or working register pair
address
Meaning
Destination location or contents
Source location or contents
Condition Code
Indirect address prefix
Stack Pointer
Program Counter
Flag Register (Control Register 252)
Register Pointer (R253)
Interrupt Mask Register (R251)
P R E L I M I N A R Y
Flags. Control register (R252) contains the following six
flags:
Symbol
C
Z
S
V
D
H
Affected flags are indicated by:
0
1
*
-
x
Meaning
Carry flag
Zero flag
Sign flag
Overflow flag
Decimal-adjust flag
Half-carry flag
Clear to zero
Set to one
Set to clear according to operation
Unaffected
Undefined
WITH
Z86E61/E63 Z8
16K/32K EPROM
®
MCU