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SPEAR1340 データシート(PDF) 169 Page - STMicroelectronics

部品番号 SPEAR1340
部品情報  Dual-core Cortex A9 HMI embedded MPU
PDF  200 Pages
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メーカー  STMICROELECTRONICS [STMicroelectronics]
ホームページ  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

SPEAR1340 データシート(HTML) 169 Page - STMicroelectronics

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SPEAr1340
Timing characteristics
Doc ID 023063 Rev 4
169/200
THCLK is the clock period of the HCLK internal clock. The frequency is programmable, for
details refer to the RCG section of RM0078, Reference manual, SPEAr1340 architecture
and functionality.
For the I2C working as SLAVE, the only significant parameters are TSU-DAT and THD-DAT.
Table 79.
Timing characteristics for I2C in High-Speed mode
Parameter
Min(1)
1.
HS_SCL_HCNT = 10, HS_SCL_LCNT = 33, FS_SCL_HCNT = 183, FS_SCL_LCNT = 233,
IC_SDA_HOLD=1
TSU-STA
(HS_SCL_HCNT+7)*THCLK
THD-STA
(HS_SCL_LCNT+2)*THCLK
TSU-DAT
TSCLLow - THD-DATmax
THD-DAT
(IC_SDA_HOLD)* THCLK
TSU-STO
(FS_SCL_HCNT+7)*THCLK
THD-STO
685*THCLK
Table 80.
Time characteristics for I2C in Fast-Speed mode
Parameter
Min(1)
1.
SCL_HCNT = 183, SCL_LCNT = 233 IC_SDA_HOLD=1
TSU-STA
(SCL_HCNT+7)*THCLK
THD-STA
(SCL_HCNT+3)*THCLK
TSU-DAT
TSCLLow - THD-DATmax
THD-DAT
(IC_SDA_HOLD)* THCLK
TSU-STO
(SCL_HCNT+7)*THCLK
THD-STO
685*THCLK
Table 81.
Timing characteristics for I2C in Standard-Speed mode
Parameter
Min(1)
1.
SCL_HCNT = 664, SCL_LCNT = 780 IC_SDA_HOLD=1
TSU-STA
(SCL_LCNT+7)*THCLK
THD-STA
(SCL_HCNT+3)*THCLK
TSU-DAT
TSCLLow - THD-DATmax
THD-DAT
(IC_SDA_HOLD)* THCLK
TSU-STO
(SCL_HCNT+7)*THCLK
THD-STO
685*THCLK



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