Visible to Intel only — GUID: aza1657772286122
Ixiasoft
GPIO-B Single-Ended I/O Standards Specifications
GPIO-B Single-Ended SSTL, HSTL, HSUL, POD and LVSTL I/O Reference Voltage Specifications
GPIO-B Single-Ended SSTL, HSTL, HSUL, and POD I/O Standards Signal Specifications
GPIO-B Single-Ended LVSTL I/O Standards Specifications
GPIO-B Differential SSTL, HSTL, and HSUL I/O Standards Specifications
GPIO-B Differential POD I/O Standards Specifications
GPIO-B Differential LVSTL I/O Standards Specifications
GPIO-B Differential I/O Standards Specifications
HPS Clock Performance
HPS Internal Oscillator Frequency
HPS PLL Specifications
HPS Cold Reset
HPS SPI Timing Characteristics
HPS SD/MMC Timing Characteristics
HPS USB UPLI Timing Characteristics
HPS Ethernet Media Access Controller (EMAC) Timing Characteristics
HPS I2C Timing Characteristics
HPS NAND Timing Characteristics
HPS Trace Timing Characteristics
HPS GPIO Interface
HPS JTAG Timing Characteristics
HPS Programmable I/O Timing Characteristics
Visible to Intel only — GUID: aza1657772286122
Ixiasoft
HPS I2C Timing Characteristics
Symbol | Description | Standard Mode | Fast Mode | Unit | ||
---|---|---|---|---|---|---|
Min | Max | Min | Max | |||
Tclk | Serial clock (SCL) clock period | 10 | — | 2.5 | — | μs |
Tclk_jitter | I2C clock output jitter | — | 2 | — | 2 | % |
THIGH 115 | SCL high period | 4116 | — | 0.6117 | — | μs |
TLOW 118 | SCL low period | 4.7119 | — | 1.3120 | — | μs |
TSU;DAT | Setup time for serial data line (SDA) data to SCL | 0.25 | — | 0.1 | — | μs |
THD;DAT 121 | Hold time for SCL to SDA data | 0 | 3.15 | 0 | 0.6 | μs |
TVD;DAT and TVD;ACK 122 | SCL to SDA output data delay | — | 3.45123 | — | 0.9124 | μs |
TSU;STA | Setup time for a repeated start condition | 4.7 | — | 0.6 | — | μs |
THD;STA | Hold time for a repeated start condition | 4 | — | 0.6 | — | μs |
TSU;STO | Setup time for a stop condition | 4 | — | 0.6 | — | μs |
TBUF | SDA high pulse duration between STOP and START | 4.7 | — | 1.3 | — | μs |
Tscl:r 125 | SCL rise time | — | 1,000 | 20 | 300 | ns |
Tscl:f 125 | SCL fall time | — | 300 | 6.54 | 300 | ns |
Tsda:r 125 | SDA rise time | — | 1,000 | 20 | 300 | ns |
Tsda:f 125 | SDA fall time | — | 300 | 6.54 | 300 | ns |
Figure 16. I2C Timing Diagram
115 You can adjust Thigh using the ic_ss_scl_hcnt or ic_fs_scl_hcnt register.
116 The recommended minimum setting for ic_ss_scl_hcnt is 428. Refer to the related information for the SCL_High_time equation.
117 The recommended minimum setting for ic_fs_scl_hcnt is 75. Refer to the related information for the SCL_High_time equation.
118 You can adjust Tlow using the ic_ss_scl_lcnt or ic_fs_scl_lcnt register.
119 The recommended minimum setting for ic_ss_scl_lcnt is 464. Refer to the related information for the SCL_Low_time equation.
120 The recommended minimum setting for ic_fs_scl_lcnt is 163. Refer to the related information for the SCL_Low_time equation.
121 THD;DAT is affected by the rise and fall time.
122 TVD;DAT and TVD;ACK are affected by the rise and fall time, as well as the SDA hold time (set by adjusting the ic_sda_hold register).
123 Use maximum SDA_HOLD = 240 to be within the specification.
124 Use maximum SDA_HOLD = 60 to be within the specification.
125 Rise and fall time parameters vary depending on external factors such as the characteristics of the I/O driver, pull-up resistor value, and total capacitance on the transmission line.