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| 型號： | MSC1212Y5PAGR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, FLASH, 40 MHz, MICROCONTROLLER, PQFP64 |
| 封裝： | GREEN, PLASTIC, TQFP-64 |
| 文件頁數(shù)： | 42/111頁 |
| 文件大小： | 1113K |
| 代理商： | MSC1212Y5PAGR |
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MSC1211, MSC1212
MSC1213,MSC1214
SBAS323G JUNE 2004 REVISED OCTOBER 2007
www.ti.com
36
FFh
7Fh
2Fh
2Dh
2Eh
2Ch
2Bh
2Ah
29h
28h
27h
26h
25h
24h
23h
22h
21h
20h
1Fh
18h
17h
10h
0Fh
08h
07h
7F
7E
7D
7C
7B
7A
79
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6F
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5F
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5D
5C
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5A
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4F
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4C
4B
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3F
3E
3D
3C
3B
3A
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2F
2E
2D
2C
2B
2A
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1F
1E
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00
0000h
Direct
RAM
Bank 3
Bit-Addressable
Bank 2
Bank 1
Bank 0
MSB
LSB
Indirect
RAM
Figure 23. Scratchpad Register Addressing
Thus, an instruction can designate the value stored in R0
(for example) to address the upper RAM. The 16 bytes
immediately above the these registers are bit addressable.
So any of the 128 bits in this area can be directly accessed
using bit addressable instructions.
Stack
Another
use
of
the Scratchpad area is for the
programmer’s stack. This area is selected using the Stack
Pointer (SP; 81h) SFR. Whenever a call or interrupt is
invoked, the return address is placed on the Stack. It also
is available to the programmer for variables, etc., since the
Stack can be moved and there is no fixed location within
the RAM designated as Stack. The Stack Pointer will
default to 07h on reset. The user can then move it as
needed. A convenient location would be the upper RAM
area (> 7Fh) since this is only available indirectly. The SP
will point to the last used value. Therefore, the next value
placed on the Stack is put at SP + 1. Each PUSH or CALL
will increment the SP by the appropriate value. Each POP
or RET will decrement as well.
Program Memory
After reset, the CPU begins execution from Program
Memory location 0000h. The selection of where Program
Memory execution begins is made by tying the EA pin to
DVDD for internal access, or DGND for external access.
When EA is tied to DVDD, any PC fetches outside the
internal Program Memory address occur from external
memory. If
EA is tied to DGND, then all PC fetches
address external memory. Table 6 shows the standard
internal Program Memory size for MSC1211/12/13/14
family members. If enabled the Boot ROM will appear from
address F800h to FFFFh.
Table 6. MSC1211/12/13/14 Maximum Internal
Program Memory Sizes
MODEL NUMBER
STANDARD INTERNAL
PROGRAM MEMORY SIZE (BYTES)
MSC121xY5
32k
MSC121xY4
16k
MSC121xY3
8k
MSC121xY2
4k
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MSC1212Y5PAGRG4 | 功能描述:數(shù)據(jù)轉(zhuǎn)換系統(tǒng) Precision ADC & DACs w/8051 CPU & Flash RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換速率:0.001 MSPs 分辨率:24 bit 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| MSC1212Y5PAGT | 功能描述:數(shù)據(jù)轉(zhuǎn)換系統(tǒng) Precision ADC & DACs w/8051 CPU & Flash RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換速率:0.001 MSPs 分辨率:24 bit 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| MSC1212Y5PAGTG4 | 功能描述:數(shù)據(jù)轉(zhuǎn)換系統(tǒng) 8051 CPU w/ 32kB Mem 24B ADC & Quad 16B RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換速率:0.001 MSPs 分辨率:24 bit 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| MSC1213 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Precision Analog-to-Digital Converter (ADC) and Digital-to-Analog Converters (DACs) |
| MSC1213Y2 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Precision Analog-to-Digital Converter (ADC) and Digital-to-Analog Converters (DACs) with 8051 Microcontroller and Flash Memory |
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