SC73P1601

HANGZHOU SILAN MICROELECTRONICS CO.,LTD

REV:1.4

2009.08.03

Http: www.silan.com.cn

Page 15 of 22

6. Branch instructions

Instruction

Operation

CF

SF

Cycle

BSS label

---

1

2

JMPS label

---

1

3

Jump instruction is active only when SF is 1, or else next instruction is executed. Please read the Pseudo-

instruction Set for details.

BSS label Jump to destination address label with range of 128 bytes

JMPS label Jump to destination address label with range of 2K program.

Symbol description of above instructions:

a.

label

Destination address of jump

b.

#k

Immediate (0~15)

c.

b

Bit addressing (0~3)

d.

%p

Port address

7. Subroutine instructions

Instruction

Operation

CF

SF

Cycle

CALLS label

---

---

2

RET

---

---

2

When executing subroutine call and return instructions, the subroutine starting address is limited from 000H to

01FH.

8. Other instructions

Instruction

Operation

CF

SF

Cycle

HOLD

---

1

1

NOP

---

---

1

TMRST

Reset timer counter

---

---

1

a.

HOLD

After executing this instruction, MCU is in the power–save mode, the clock stops

oscillation and power consumption reduces dramatically.

b.

NOP

Null operation. It doesn’

t affect anything.

c.

TMRST

Timer clear command. It will clear all values of the timer to 0. This instruction is often

used to reset WDT in program.

9. Pseudoinstruction

ORG

Format:

[Label:] ORG address

Function:

Redefine following start address

Expression:

Label: selectable

Address: redefined address, can be binary, decimal or hexadecimal.

Redefined address is an absolute address which could not be returned back. That is, the redefined address