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參數(shù)資料
| 型號： | HD404828R |
| 廠商： | Hitachi,Ltd. |
| 英文描述： | AS Microcomputer Incorporating a LCD controller/Driver Circuit(帶LCD控制/驅(qū)動電路的微計算機) |
| 中文描述： | 由于微機安裝有LCD控制器/驅(qū)動電路（帶液晶控制/驅(qū)動電路的微計算機） |
| 文件頁數(shù)： | 117/147頁 |
| 文件大?。?/td> | 519K |
| 代理商： | HD404828R |
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HD404829R Series
117
ROM Addressing Modes and the P Instruction
The MCU has four ROM addressing modes, as shown in figure 101 and described below.
Direct Addressing Mode:
A program can branch to any address in the ROM memory space by executing
the JMPL, BRL, or CALL instruction. Each of these instructions replaces the 14 program counter bits
(PC
13
–PC
0
) with 14-bit immediate data.
Current Page Addressing Mode:
The MCU has 64 pages of ROM with 256 words per page. A program
can branch to any address in the current page by executing the BR instruction. This instruction replaces the
eight low-order bits of the program counter (PC
7
–PC
0
) with eight-bit immediate data. If the BR instruction
is on a page boundary (address 256n + 255), executing that instruction transfers the PC contents to the next
physical page, as shown in figure 98. This means that the execution of the BR instruction on a page
boundary will make the program branch to the next page.
Note that the HMCS400-series cross macroassembler has an automatic paging feature for ROM pages.
Zero-Page Addressing Mode:
A program can branch to the zero-page subroutine area located at $0000–
$003F by executing the CAL instruction. When the CAL instruction is executed, 6 bits of immediate data
are placed in the six low-order bits of the program counter (PC
5
–PC
0
), and 0s are placed in the eight high-
order bits (PC
13
–PC
6
).
Table Data Addressing Mode:
A program can branch to an address determined by the contents of four-bit
immediate data, the accumulator, and the B register by executing the TBR instruction.
P Instruction:
ROM data addressed in table data addressing mode can be referenced with the P instruction
as shown in figure 102. If bit 8 of the ROM data is 1, eight bits of ROM data are written to the accumulator
and the B register. If bit 9 is 1, eight bits of ROM data are written to the R1 and R2 port output registers. If
both bits 8 and 9 are 1, ROM data is written to the accumulator and the B register, and also to the R1 and
R2 port output registers at the same time.
The P instruction has no effect on the program counter.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| HD404829R | AS Microcomputer Incorporating a LCD controller/Driver Circuit(帶LCD控制/驅(qū)動電路的微計算機) |
| HD4048412 | 4-Bit Single-Chip Microcomputer |
| HD4048412FS | 4-Bit Single-Chip Microcomputer |
| HD4048412H | RELAY BASE |
| HD4048412TF | 4-Bit Single-Chip Microcomputer |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HD404828RFS | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:AS Microcomputer Incorporating a LCD controller/Driver Circuit |
| HD404828RH | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:AS Microcomputer Incorporating a LCD controller/Driver Circuit |
| HD404828RTF | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:AS Microcomputer Incorporating a LCD controller/Driver Circuit |
| HD404828TF | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Bit Microcontroller |
| HD404829FS | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Bit Microcontroller |
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