谁能帮我解释一下这个程序（汇编语言） 谢谢？

CJNE A,#60,EXIT
MOV SEC,#0
MOV SEC_B,#0
MOV MIN,#0
EXIT:
POP PSW
POP ACC
RETI

DELAY_10MS:
MOV R6,#5
DEL:
MOV R7,#0FFH
DJNZ R7,$
DJNZ R6,DEL
RET
tab:
db 0C0H,0f9h,0A4H,0B0H,99H,92H,82H,0F8H,80H,90H
END

一句都看不懂CJNE A,#60,EXIT
MOV SEC,#0
MOV SEC_B,#0
MOV MIN,#0
EXIT:
POP PSW
POP ACC
RETI