參數(shù)資料
型號(hào)： HD4074618H
廠商： Hitachi,Ltd.
英文描述： 4-Bit Single-Chip Microcomputer
中文描述： 4位單片機(jī)
文件頁(yè)數(shù)： 14/89頁(yè)
文件大?。?/td> 358K
代理商： HD4074618H
HD404618 Series
14
V Register (V):
Used for RAM address expansion and selecting the bank of RAM addresses $100–$2CF
(464 digits). Thus, when accessing locations $100–$2CF, specify the value of the V register (V = $0 for
bank 0, V = $1 for bank 1). Locations $000–$0FF and $3C0–$3FF can be accessed independent of the V
register. The V register is located at RAM address $03F.
W Register (W), X Register (X), Y Register (Y):
Two-bit (W) and four-bit (X and Y) registers used for
indirect RAM addressing. The Y register is also used for D-port addressing.
SPX Register (SPX), SPY Register (SPY):
Four-bit registers used to supplement the X and Y registers.
Carry Flag (CA):
One-bit flag that stores any ALU overflow generated by an arithmetic operation. CA is
affected by the SEC, REC, ROTL, and ROTR instructions. During an interrupt, a carry is pushed onto the
stack and popped from the stack by the RTNI instruction–but not by the RTN instruction.
Status Flag (ST):
One-bit flag that latches any overflow generated by an arithmetic or compare
instruction, not-zero decision from the ALU, or result of a bit test. ST is used as a branch condition of the
BR, BRL, CAL, or CALL instruction. The contents of ST remain unchanged until the next arithmetic,
compare, or bit test instruction is executed, but become 1 after the BR, BRL, CAL, or CALL instruction is
read, regardless of whether the instruction is executed or skipped. During an interrupt, the contents of ST
are pushed onto the stack and popped from the stack by the RTNI instruction, but not by the RTN
instruction.
Program Counter (PC):
A 14-bit counter that points to the ROM address of the instruction being
executed.
Stack Pointer (SP):
Ten-bit pointer that contains the address of the stack area to be used next. The SP is
initialized to $3FF by MCU reset, is decremented by 4 when data is pushed onto the stack, and is
incremented by 4 when data is popped from the stack. Since the top four bits of the SP are fixed at 1111, a
stack of up to 16 levels can be used.
The SP can also be initialized to $3FF in another way: by resetting the RSP bit with the REM or REMD
instruction.
相關(guān)PDF資料
PDF描述
HD4074618TF 4-Bit Single-Chip Microcomputer
HD4046212R AS Microcomputer Incorporating a DTMF Generator Circuit(微計(jì)算機(jī)帶雙音多頻發(fā)生器電路)
HD404628R AS Microcomputer Incorporating a DTMF Generator Circuit(微計(jì)算機(jī)帶雙音多頻發(fā)生器電路)
HD4074629 AS Microcomputer Incorporating a DTMF Generator Circuit(微計(jì)算機(jī)帶雙音多頻發(fā)生器電路)
HD404629R AS Microcomputer Incorporating a DTMF Generator Circuit(微計(jì)算機(jī)帶雙音多頻發(fā)生器電路)
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
HD4074618TF 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:4-Bit Single-Chip Microcomputer
HD4074629 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:AS Microcomputer Incorporating a DTMF Generator Circuit
HD4074629F 制造商:Renesas Electronics Corporation 功能描述:
HD4074629FS 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Bit Microcontroller
HD4074629H 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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