CD00237391 Datasheet, PDF (137/177 Pages) STMicroelectronics – ARM-based 32-bit MCU, 150DMIPs, up to 1 MB Flash/128+4KB RAM

STM32F20xxx
Electrical characteristics
Figure 67. PC Card/CompactFlash controller waveforms for I/O space write access
FSMC_NCE4_1
FSMC_NCE4_2
FSMC_A[10:0]
tv(NCEx-A)
th(NCE4_1-AI)
FSMC_NREG
FSMC_NWE
FSMC_NOE
FSMC_NIORD
td(NCE4_1-NIOWR)
FSMC_NIOWR
ATTxHIZ =1
FSMC_D[15:0]
tw(NIOWR)
tv(NIOWR-D)
th(NIOWR-D)
ai14900c
Table 78. Switching characteristics for PC Card/CF read and write cycles in
attribute/common space⁽¹⁾⁽²⁾
Symbol
Parameter
Min
Max
t_v(NCEx-A) FSMC_Ncex low to FSMC_Ay valid
t_{h(NCEx_AI)} FSMC_NCEx high to FSMC_Ax invalid
t_d(NREG-NCEx) FSMC_NCEx low to FSMC_NREG valid
t_h(NCEx-NREG) FSMC_NCEx high to FSMC_NREG invalid
t_d(NCEx-NWE) FSMC_NCEx low to FSMC_NWE low
t_d(NCEx-NOE) FSMC_NCEx low to FSMC_NOE low
t_w(NOE)
FSMC_NOE low width
t_{d(NOE_NCEx)} FSMC_NOE high to FSMC_NCEx high
t_{su (D-NOE)} FSMC_D[15:0] valid data before FSMC_NOE high
t_{h (N0E-D)} FSMC_N0E high to FSMC_D[15:0] invalid
t_w(NWE) FSMC_NWE low width
t_{d(NWE_NCEx}) FSMC_NWE high to FSMC_NCEx high
t_d(NCEx-NWE) FSMC_NCEx low to FSMC_NWE low
t_{v (NWE-D)} FSMC_NWE low to FSMC_D[15:0] valid
t_{h (NWE-D)} FSMC_NWE high to FSMC_D[15:0] invalid
t_{d (D-NWE)} FSMC_D[15:0] valid before FSMC_NWE high
1. C_L = 30 pF.
2. Based on characterization, not tested in production.
-
4
-
T_HCLK+ 4
-
-
8T_HCLK– 0.5
5T_HCLK+ 2.5
4
2
8T_HCLK- 1
5T_HCLK+ 1.5
-
-
8 T_HCLK
13T_HCLK
0
-
3.5
-
5T_HCLK+ 1
5T_HCLK
8T_HCLK+ 1
-
-
-
8T_HCLK+ 4
5HCLK+ 1
0
-
-
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Doc ID 15818 Rev 9
137/177