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AT89C5122D-RDRUM 数据表(PDF) 85 Page - ATMEL Corporation |
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AT89C5122D-RDRUM 数据表(HTML) 85 Page - ATMEL Corporation |
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85 / 208 page  85 AT83R5122, AT8xC5122/23 4202F–SCR–07/2008 Reset Value = 0000 0000b Reset Value = 0010 0101b Reset Value = 1000 0000b Table 56. Smart Card Character/Block Waiting Time Register 2 SCWT2 (S:B6h, SCRS=0) 76 54 32 10 WT23 WT22 WT21 WT20 WT19 WT18 WT17 WT16 Bit Number Bit Mnemonic Description 7 - 0 WT[23:16] Waiting Time Byte2 Used together with WT[31:24] and WT[15:0] in registers SCWT3,SCWT1, SCWT0 (see Table 58). Table 57. Smart Card Character/Block Waiting Time Register 1 SCWT1 (S:B5h, SCRS=0) 76 54 32 10 WT15 WT14 WT13 WT12 WT11 WT10 WT9 WT8 Bit Number Bit Mnemonic Description 7 - 0 WT[15:8] Waiting Time Byte 1 Used together with WT[31:16] and WT[7:0] in registers SCWT3,SCWT2, SCWT0 (see Table 55). Table 58. Smart Card Character/Block Waiting Time Register 0 SCWT0 (S:B4h, SCRS=0) 76 54 32 10 WT7 WT6 WT5 WT4 WT3 WT2 WT1 WT0 Bit Number Bit Mnemonic Description 7 - 0 WT[7:0] Waiting Time Byte 0 WT[31:0] is the reload value of the Waiting Time Counter (WTC). The WTC is a general-purpose timer. It is using the ETU clock and is controlled by the WTEN bit (see Table 44 on page 77 and Section “Waiting Time (WT) Counter”, page 67). When UART bit of Registers is set, the WTC is automatically reloaded at each start bit of the UART. It is used to check the maximum time between to consecutive start bits. |
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