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T89C51AC2-RLSI-M 数据表(PDF) 112 Page - ATMEL Corporation |
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T89C51AC2-RLSI-M 数据表(HTML) 112 Page - ATMEL Corporation |
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112 / 117 page ![]() 112 Draft.A - March 30, 2001 Preview - Confidential T89C51AC2 18.4.6. External Data Memory Read Cycle 18.4.7. Serial Port Timing - Shift Register Mode Table 32. Symbol Description (F= 40 MHz) Symbol Parameter TXLXL Serial port clock cycle time TQVHX Output data set-up to clock rising edge TXHQX Output data hold after clock rising edge TXHDX Input data hold after clock rising edge TXHDV Clock rising edge to input data valid Table 33. AC Parameters for a Fix Clock (F= 40 MHz) Symbol Min Max Units TXLXL 300 ns TQVHX 200 ns TXHQX 30 ns TXHDX 0 ns TXHDV 117 ns ALE PSEN RD PORT 0 PORT 2 A0-A7 DATA IN ADDRESS OR SFR-P2 TAVWL TLLWL TRLAZ ADDRESS A8-A15 OR SFR P2 TRHDZ TWHLH TRLRH TLLDV TRHDX TLLAX TAVDV |
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