z08617 ZiLOG Semiconductor, z08617 Datasheet - Page 19

• Manufacturer Part Number: z08617
• Description: Nmos Z8 8-bit Mcu Keyboard Controller
• Manufacturer: ZiLOG Semiconductor

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
ing-
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
Meaning
Indirect register pair or indirect work-
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)
register pair address
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
Z08617 NMOS Z8
K
EYBOARD
®
C
ONTROLLER
8-B
IT
MCU
19