STR91XFAX32 Datasheet, PDF (73/99 Pages) STMicroelectronics – ARM966E-S™ 16/32-Bit Flash MCU with Ethernet, USB, CAN, AC motor control, 4 timers, ADC, RTC, DMA

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Electrical characteristics
7.11
7.11.1
External memory bus timings
V_DDQ = 2.7 - 3.6V, V_DD = 1.65 - 2V, T_A = -40 / 85 °C, C_L= 30 pF unless otherwise specified.
Table 31. EMI bus clock period
Symbol
Parameter⁽¹⁾
Value ⁽²⁾
t_BCLK
EMI Bus Clock period
1 /(f_HCLK x EMI_ratio)
1. The internal EMI Bus clock signal is available externally only on LFBGA144 packages (ball M8), and not
available on LQFP packages.
2. EMI_ratio =1/ 2 by default (can be programmed to be 1 by setting the proper bits in the SCU_CLKCNTR
register)
Asynchronous mode
Non Mux Write
Figure 17. Non-mux write timings
EMI_CSxn
EMI_A[15:0]
Address
EMI_D[7:0]
EMI_BWR_WRLn
Data
t_WAS
t_WDS
t_WP
t_WCR
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