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UPD6P8 Datasheet(PDF) 57 Page - Renesas Technology Corp

Part # UPD6P8
Description  MOS INTEGRATED CIRCUIT
PDF  101 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

UPD6P8 Datasheet(HTML) 57 Page - Renesas Technology Corp

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55
µPD6P8, 6P8A, 6P8B
Data Sheet U17848EJ5V0DS
10.7 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.
µPD6P8, 6P8A, 6P8B (ROM: 2K steps): Pages 0, 1
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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