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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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ST10F271Z1 데이터시트(PDF) 176 Page - STMicroelectronics |
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ST10F271Z1 데이터시트(HTML) 176 Page - STMicroelectronics |
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176 / 185 page  Electrical characteristics ST10F271Z1 176/185 25.8.19 External bus arbitration VDD = 5 V ± 10 %, V SS = 0 V, TA = -40 to +125 °C, CL = 50 pF 1. Partially tested, guaranteed by design characterization. Figure 62. External bus arbitration (releasing the bus) 1. The ST10F271Z1 will complete the currently running bus cycle before granting bus access. 2. This is the first possibility for BREQ to become active. 3. The CS outputs will be resistive high (pull-up) after t64. Table 81. External bus arbitration timings Symbol Parameter FCPU = 40 MHz TCL = 12.5 ns Variable CPU clock 1/2 TCL = 1 to 64 MHz min. max. min. max. t61 SR HOLD input setup time to CLKOUT 18.5–18.5– ns t62 CC CLKOUT to HLDA high or BREQ low delay – 12.5 – 12.5 ns t63 CC CLKOUT to HLDA low or BREQ high delay – 12.5 – 12.5 ns t64 CC CSx release 1) –20 – 20 ns t65 CC CSx drive – 415– 415 ns t66 CC Other signals release 1) –20 – 20 ns t67 CC Other signals drive – 4 15 – 4 15 ns t61 t63 t66 1) t64 1) 2) t62 3) CLKOUT HOLD HLDA BREQ Others CSx (P6.x) |
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