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STM32H7B3AI датащи(PDF) 143 Page - STMicroelectronics |
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STM32H7B3AI датащи(HTML) 143 Page - STMicroelectronics |
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143 / 238 page ![]() Symbol Parameter Conditions Min(1) Typ(1) Max(1)(2) Unit thr(OUT) thf(OUT) Data output hold time DHQC = 1, PRESCALER[7:0]=1,2... t(CLK)/4 ns - - 1. Guaranteed by characterization results, unless otherwise specified. 2. At VOS1, these values are degraded by up to 5 %. 3. The maximum frequency values are given for a maximum RWDS to DQ skew ≤ ±1.0 ns. 4. DHQC must be set to reach the mentioned frequency. 5. Guaranteed by design. 6. Using PC2, PC3, PI11, PF0 or PF1 I/Os limits the maximum clock frequency. 7. Delay block bypassed. 8. Using PC2, PC3, PI11, PF0 or PF1 I/O in the data bus adds 3.5 ns to this timing value. Figure 50. OctoSPI timing diagram - DTR mode Data output D0 D2 D4 Clock Data input D0 D2 D4 t(CLK) tw(CLKH) tw(CLKL) tr(CLK) tf(CLK) tsf(IN) thf(IN) tvf(OUT) thr(OUT) D1 D3 D5 D1 D3 D5 tvr(OUT) thf(OUT) tsr(IN)thr(IN) Figure 51. OctoSPI Hyperbus clock CLK t(NCLK) tw(NCLKL) tw(NCLKH) tf(NCLK) tr(NCLK) tr(CLK) tw(CLKH) tw(CLKL) t(CLK) tf(CLK) NCLK VOD(CLK) Figure 52. OctoSPI Hyperbus read NCS tACC= Initial access Latency count Command address 47:40 39:32 31:24 23:16 15:8 7:0 Dn A Dn B Dn+1 A Dn+1 B Host drives DQ[7:0] and the memory drives RWDS. CLK, NCLK RWDS DQ[7:0] Memory drives DQ[7:0] and RWDS. tw(CS) tv(RWDS) tv(CLK) tv(DS) tv(DQ) th(CLK) th(DS) tv(OUT) th(OUT) th(DQ) ts(DQ) STM32H7B3xI Operating conditions DS13139 - Rev 8 page 143/238 |
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