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AT90SCR100 bảng dữ liệu(PDF) 328 Page - ATMEL Corporation

tên linh kiện AT90SCR100
Giải thích chi tiết về linh kiện  8-bit Microcontroller for Smart Card Readers
PDF  433 Pages
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nhà sản xuất  ATMEL [ATMEL Corporation]
Trang chủ  http://www.atmel.com
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AT90SCR100 bảng dữ liệu(HTML) 328 Page - ATMEL Corporation

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328
TPR0327AY–SMS–30Jan09
AT90SCR100
22.9.6
TWAMR – TWI (Slave) Address Mask Register
• Bits 7..1 – TWAM: TWI Address Mask
The TWAMR can be loaded with a 7-bit Slave Address mask. Each of the bits in TWAMR can
mask (disable) the corresponding address bit in the TWI Address Register (TWAR). If the mask
bit is set to one then the address match logic ignores the compare between the incoming
address bit and the corresponding bit in TWAR. Figure 22-22 shows the address match logic in
detail.
Figure 22-22.
TWI Address Match Logic, Block Diagram
• Bit 0 – Res: Reserved Bit
This bit is reserved and will always read as zero.
Bit
7654
3
2
1
0
$0000BD
TWAM [6:0]
-
TWAMR
Read/write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Initial value
0000
0
0
0
0
0x00
Address
Match
Address Bit Comparator 0
Address Bit Comparator 6..1
TWAR0
TWAMR0
Address
Bit 0



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