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| 型號(hào)： | 4559 |
| 廠商： | Renesas Technology Corp. |
| 英文描述： | SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER |
| 中文描述： | 單芯片4位微機(jī)的CMOS |
| 文件頁(yè)數(shù)： | 62/148頁(yè) |
| 文件大?。?/td> | 1732K |
| 代理商： | 4559 |
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Rev.1.04
Aug 23, 2007
Page 20 of 146
REJ03B0188-0104
4559 Group
(8) Program counter (PC)
Program counter (PC) is used to specify a ROM address (page
and address). It determines a sequence in which instructions
stored in ROM are read. It is a binary counter that increments the
number of instruction bytes each time an instruction is executed.
However, the value changes to a specified address when branch
instructions, subroutine call instructions, return instructions, or
the table reference instruction (TABP p) is executed.
Program counter consists of PCH (most significant bit to bit 7)
which specifies to a ROM page and PCL (bits 6 to 0) which
specifies an address within a page. After it reaches the last
address (address 127) of a page, it specifies address 0 of the next
page (Figure 18).
Make sure that the PCH does not specify after the last page of the
built-in ROM.
(9) Data pointer (DP)
Data pointer (DP) is used to specify a RAM address and consists
of registers Z, X, and Y. Register Z specifies a RAM file group,
register X specifies a file, and register Y specifies a RAM digit
(Figure 19).
Register Y is also used to specify the port D bit position.
When using port D, set the port D bit position to register Y
certainly and execute the SD, RD, or SZD instruction (Figure
20).
Note
Register Z of data pointer is undefined after system is released
from reset.
Also, registers Z, X and Y are undefined in the power down
mode. After system is returned from the power down mode, set
these registers.
Fig 18. Program counter (PC) structure
Fig 19. Data pointer (DP) structure
Fig 20. SD instruction execution example
a3
a2
a1
a0
a6
a5
a4
PCH
Specifying page
Program counter (PC)
p3
p2
p1
p0
p6
p5
p4
PCL
Specifying address
Register Y (4)
Data pointer (DP)
X2 X1 X0 Y3
Z1 Z0 X3
Y2 Y1 Y0
Register X (4)
Register Z (2)
Specifying RAM digit
Specifying RAM file
Specifying RAM file group
Specifying bit position
0
1
Register Y (4)
Set
D3
D2
1
D1
D0
Port D output latch
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PDF描述 |
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| 456700000 | Terminal Block; Leaded Process Compatible:Yes |
| 457000000 | Cross Connector; Number of Positions:10; Current Rating:24 VA |
| 45714-0003 | Edge Connector,PCB Mnt,RECEPT,8 Contacts,0.507 Pitch,COMPLIANT FIT Terminal,GUIDE SLOT |
| 45714-0001 | Card Edge Connector; No. of Contacts:4; Pitch Spacing:0.508"; Contact Termination:Press-Fit; Body Material:LCP Liquid Crystal Polymer, Glass-filled; Mounting Type:Through Hole; Series:45714; Color:Black; Voltage Rating:250V RoHS Compliant: Yes |
| 45714-0002 | Card Edge Connector; No. of Contacts:6; Pitch Spacing:0.508"; Contact Termination:Press-Fit; Body Material:LCP Liquid Crystal Polymer, Glass-filled; Mounting Type:Through Hole; Series:45714; Color:Black; Voltage Rating:250V RoHS Compliant: Yes |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 4559_08 | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:Standard Characteristics |
| 45-590 | 制造商:GC Electronics 功能描述:Conn D-Subminiature Adapter F/F 9/15 POS ST 1 Port |
| 45-590 4/PK | 功能描述:電纜組件 DB-9F DB-15F HI DEN RoHS:否 制造商:Molex 產(chǎn)品:Power Assemblies 類型:Cable Assembly 連接器端口 A:No Connector 連接器端口 A 管腳計(jì)數(shù):4 連接器端口 B:No Connector 連接器端口 B 管腳計(jì)數(shù): 型式:Male 線規(guī) - 美國(guó)線規(guī)（AWG）:20, 28 長(zhǎng)度:0.305 m 顏色:Black, Red |
| 4-5-5906 | 功能描述:TAPE 5906 VHB FOAM 4" X 5YD 制造商:3m (tc) 系列:* 零件狀態(tài):有效 標(biāo)準(zhǔn)包裝:1 |
| 4-5-5907 | 功能描述:TAPE 5907 VHB FOAM 4" X 5YD 制造商:3m (tc) 系列:* 零件狀態(tài):有效 標(biāo)準(zhǔn)包裝:1 |
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