參數(shù)資料
型號: HD4046212R
廠商: Hitachi,Ltd.
英文描述: AS Microcomputer Incorporating a DTMF Generator Circuit(微計算機帶雙音多頻發(fā)生器電路)
中文描述: 由于微機安裝有雙音多頻發(fā)電機斷路器(微計算機帶雙音多頻發(fā)生器電路)
文件頁數(shù): 123/155頁
文件大小: 549K
代理商: HD4046212R
HD404629R Series
123
ROM Addressing Modes and the P Instruction
The MCU has four ROM addressing modes, as shown in figure 108 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 105. 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 109. 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PDF資料
PDF描述
HD404628R AS Microcomputer Incorporating a DTMF Generator Circuit(微計算機帶雙音多頻發(fā)生器電路)
HD4074629 AS Microcomputer Incorporating a DTMF Generator Circuit(微計算機帶雙音多頻發(fā)生器電路)
HD404629R AS Microcomputer Incorporating a DTMF Generator Circuit(微計算機帶雙音多頻發(fā)生器電路)
HD404638R 4-Bit Single-Chip Microcomputer(4位單片微計算機)
HD40A4638R 4-Bit Single-Chip Microcomputer(4位單片微計算機)
相關代理商/技術參數(shù)
參數(shù)描述
HD4046212RFS 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Bit Microcontroller
HD4046212RH 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:AS Microcomputer Incorporating a DTMF Generator Circuit
HD4046212RTF 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Bit Microcontroller
HD4046212TF 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Bit Microcontroller
HD404628FS 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Bit Microcontroller