SPEAR320 datasheet(55/73 Pages) STMICROELECTRONICS

部件名	SPEAR320

功能描述	Embedded MPU with ARM926 core, optimized for factory automation and consumer applications

PDF	73 Pages

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制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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55 / 73 page

SPEAr320

Timing requirements

Doc ID 16755 Rev 5

55/73

Note:

The timings shown in Figure 10 depend on the programmed value of tSCLHigh and tSCLLow,

so the values present in the three tables here above have been calculated using the

minimum programmable values of :

●

IC_HS_SCL_HCNT=19 and IC_HS_SCL_LCNT=53 registers (for High-Speed mode);

●

IC_FS_SCL_HCNT=99 and IC_FS_SCL_LCNT=215 registers (for Fast-Speed mode);

●

IC_SS_SCL_HCNT=664 and IC_SS_SCL_LCNT=780 registers (for Standard-Speed

mode).

These minimum values depend on the AHB clock frequency, which is 166 MHz.

7.6

FSMC timing characteristics

The characterization timing is done using primetime considering an output load of 3 pF on

the data, 15 pF on FSMC_CSx, FSMC_RE and FSMC_WE and 10 pF on FSMC_ADDR_LE

and FSMC_CMD_LE.

7.6.1

NAND Flash configuration

Figure 11.

Output command signal waveforms for NAND Flash

Table 35.

Timing characteristics for I2C in standard speed mode

Parameter

Min

Unit

tSU-STA

4723.6

tHD-STA

3991.9

tSU-DAT

4676.1

tHD-DAT

0.8

tSU-STO

4027.7

tHD-STO

4742.2

FSMC_CSx

FSMC_WE

FSMC_Dx

Command

tCLE

tWE

tIO

FSMC_CMD_LE

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