KS57C2308/P2308/C2316/P2316
SAM47 INSTRUCTION SET
5-73
PUSH
— Push Onto Stack
PUSH
src
Operation:
Operand
Operation Summary
Bytes
Cycles
RR
Push register pair onto stack
1
1
SB
Push SMB and SRB values onto stack
2
2
Description:
The SP is then decreased by two and the contents of the source operand are copied into the
RAM location addressed by the stack pointer, thereby adding a new element to the top of the
stack.
Operand
Binary Code
Operation Notation
RR
0
0
1
0
1
r2
r1
1
(SP–1)
←
RR
H
, (SP–2)
←
RR
L
SP
←
SP–2
SB
1
1
0
1
1
1
0
1
(SP–1)
←
SMB, (SP–2)
←
SRB;
(SP)
←
SP–2
0
1
1
0
0
1
1
1
Example:
As an interrupt service routine begins, the stack pointer contains the value 0FAH and the data
pointer register pair HL contains the value 20H. The instruction
PUSH
HL
leaves the stack pointer set to 0F8H and stores the values 2H and 0H in RAM locations 0F9H
and 0F8H, respectively.
Summary of Contents for KS57C2308
Page 30: ...ADDRESS SPACES KS57C2308 P2308 C2316 P2316 2 22 NOTES ...
Page 168: ...SAM47 INSTRUCTION SET KS57C2308 P2308 C2316 P2316 5 94 NOTES ...
Page 170: ......
Page 206: ...POWER DOWN KS57C2308 P2308 C2316 P2316 8 8 NOTES ...
Page 210: ...RESET KS57C2308 P2308 C2316 P2316 9 4 NOTES ...
Page 222: ...I O PORTS KS57C2308 P2308 C2316 P2316 10 12 NOTES ...
Page 272: ...LCD CONTROLLER DRIVER KS57C2308 P2308 C2316 P2316 12 24 NOTES ...
Page 280: ...SERIAL I O INTERFACE KS57C2308 P2308 C2316 P2316 13 8 NOTES ...
Page 294: ...MECHANICAL DATA KS57C2308 P2308 C2316 P2316 15 2 NOTES ...
Page 310: ...KS57P2308 P2316 OTP KS57C2308 P2308 C2316 P2316 16 16 NOTES ...
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