參數(shù)資料
型號: UPD68AMC-XXX-5A4
元件分類: 微控制器/微處理器
英文描述: 4-BIT, OTPROM, 4.5 MHz, MICROCONTROLLER, PDSO20
封裝: 0.300 INCH, PLASTIC, SSOP-20
文件頁數(shù): 44/73頁
文件大?。?/td> 561K
代理商: UPD68AMC-XXX-5A4
47
PD67, 67A, 68, 68A, 69
Data Sheet U14935EJ2V1DS
9.7 Branch Instructions
The program memory consists of pages in steps of 1K (000H to 3FFH). However, as the assembler automatically
performs page optimization, it is unnecessary to designate pages. The pages allowed for each product are as
follows.
PD67, 67A (ROM: 1K steps): Page 0
PD68, 68A (ROM: 2K steps): Pages 0, 1
PD69 (ROM: 4K steps):
Pages 0 to 3
PD6P9 (PROM: 4K steps):
Pages 0 to 3
JMP addr
<1> Instruction code:
Page 0
0100010001
; page 1 0100110001
Page 2
0100010100
; page 3 0100110100
a9 a7 a6 a5 a4 a8 a3 a2 a1 a0
<2> Cycle count:
1
<3> Function:
PC
← addr
The 10 bits (PC9-0) of the program counter are replaced directly by the specified address addr (a9 to
a0).
JC addr
<1> Instruction code:
Page 0
0110010001
; page 1 0101010001
Page 2
0110010100
; page 3 0101010100
a9 a7 a6 a5 a4 a8 a3 a2 a1 a0
<2> Cycle count:
1
<3> Function:
if
CY = 1
PC
← addr
else
PC
← PC + 2
If the carry flag CY is set (to 1), a jump is made to the address specified by addr (a9 to a0).
JNC addr
<1> Instruction code:
Page 0
0110110001
; page 1 0101110001
Page 2
0110110100
; page 3 0101110100
a9 a7 a6 a5 a4 a8 a3 a2 a1 a0
<2> Cycle count:
1
<3> Function:
if
CY = 0
PC
← addr
else
PC
← PC + 2
If the carry flag CY is cleared (to 0), a jump is made to the address specified by addr (a9 to a0).
JF addr
<1> Instruction code:
Page 0
0111010001
; page 1 1000010001
Page 2
0111010100
; page 3 1000010100
a9 a7 a6 a5 a4 a8 a3 a2 a1 a0
<2> Cycle count:
1
<3> Function:
if
F = 1
PC
← addr
else
PC
← PC + 2
If the status flag F is set (to 1), a jump is made to the address specified by addr (a9 to a0).
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