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參數資料
| 型號： | IS80LV51-24PQI |
| 廠商： | INTEGRATED SILICON SOLUTION INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | CMOS SINGLE CHIP LOW VOLTAGE 8-BIT MICROCONTROLLER |
| 中文描述： | 8-BIT, MROM, 24 MHz, MICROCONTROLLER, PQFP44 |
| 封裝： | PLASTIC, QFP-44 |
| 文件頁數： | 7/43頁 |
| 文件大小： | 339K |
| 代理商： | IS80LV51-24PQI |
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IS80LV51
IS80LV31
Integrated Silicon Solution, Inc.
ADVANCE INFORMATION
MC018-0A
10/01/98
7
ISSI
OPERATING DESCRIPTION
The detail description of the IS80LV51/31 included in this
description are:
Memory Map and Registers
Timer/Counters
Serial Interface
Interrupt System
Other Information
MEMORY MAP AND REGISTERS
Memory
The IS80LV51/31 has separate address spaces for
program and data memory. The program and data memory
can be up to 64K bytes long. The lower 4K program
memory can reside on-chip. (IS80LV51 only) Figure 5
shows a map of the IS80LV51/31 program and data
memory.
The IS80LV51/31 has 128 bytes of on-chip RAM, plus
numbers of special function registers. The lower 128
bytes can be accessed either by direct addressing or by
indirect addressing. Figure 6 shows internal data memory
organization and SFR Memory Map.
The lower 128 bytes of RAM can be divided into three
segments as listed below and shown in Figure 7.
1.
Register Banks 0-3:
locations 00H through 1FH
(32 bytes). The device after reset defaults to register
bank 0. To use the other register banks, the user
must select them in software. Each register bank
contains eight 1-byte registers R0-R7. Reset initial-
izes the stack point to location 07H, and is
incremented once to start from 08H, which is the first
register of the second register bank.
2.
Bit Addressable Area:
16 bytes have been as-
signed for this segment 20H-2FH. Each one of the
128 bits of this segment can be directly addressed
(0-7FH). Each of the 16 bytes in this segment can
also be addressed as a byte.
3.
Scratch Pad Area:
30H-7FH are available to the
user as data RAM. However, if the data pointer has
been initialized to this area, enough bytes should be
left aside to prevent SP data destruction.
FFFFH:
64K
0FFFH:
4K
Program Memory
(Read Only)
Data Memory
(Read/Write)
EA = 0
External
External
External
PSEN
EA = 1
Internal
0000
00
FFFFH
Internal
FFH
80H
7FH
0000
RD WR
Figure 5. IS80LV51/31 Program and Data Memory Structure
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| IS80LV51-24W | CMOS SINGLE CHIP LOW VOLTAGE 8-BIT MICROCONTROLLER |
| IS80LV32 | CMOS SINGLE CHIP LOW VOLTAGE 8-BIT MICROCONTROLLER |
| IS80LV32-24PL | CMOS SINGLE CHIP LOW VOLTAGE 8-BIT MICROCONTROLLER |
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相關代理商/技術參數 |
參數描述 |
|---|---|
| IS80LV51-24W | 制造商:ISSI 制造商全稱:Integrated Silicon Solution, Inc 功能描述:CMOS SINGLE CHIP LOW VOLTAGE 8-BIT MICROCONTROLLER |
| IS80LV51-24WI | 制造商:ISSI 制造商全稱:Integrated Silicon Solution, Inc 功能描述:CMOS SINGLE CHIP LOW VOLTAGE 8-BIT MICROCONTROLLER |
| IS80LV51-40PL | 制造商:ISSI 制造商全稱:Integrated Silicon Solution, Inc 功能描述:CMOS SINGLE CHIP LOW VOLTAGE 8-BIT MICROCONTROLLER |
| IS80LV51-40PLI | 制造商:ISSI 制造商全稱:Integrated Silicon Solution, Inc 功能描述:CMOS SINGLE CHIP LOW VOLTAGE 8-BIT MICROCONTROLLER |
| IS80LV51-40PQ | 制造商:ISSI 制造商全稱:Integrated Silicon Solution, Inc 功能描述:CMOS SINGLE CHIP LOW VOLTAGE 8-BIT MICROCONTROLLER |
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