IMX35_1 Datasheet, PDF (87/148 Pages) Freescale Semiconductor, Inc – i.MX35 Applications Processors for Industrial and Consumer Products

9 _{Data read point}
Tdrp = THSP_CLK ⋅ ceil _{H---D--S--I-P-S---_P---C-#---L_---RK----E-_--A-P---E-D---R-_---IE--O--N--D---}
10 _{Loopback delay Tlbd is the cumulative propagation delay of read controls and read data. It includes an IPU output delay, a}
device – level output delay, board delays, a device – level input delay, an IPU input delay. This value is device specific.
The following parameters are programmed via the DI_DISP#_TIME_CONF_1,
DI_DISP#_TIME_CONF_2, and DI_HSP_CLK_PER registers:
• DISP#_IF_CLK_PER_WR, DISP#_IF_CLK_PER_RD
• HSP_CLK_PERIOD
• DISP#_IF_CLK_DOWN_WR
• DISP#_IF_CLK_UP_WR
• DISP#_IF_CLK_DOWN_RD
• DISP#_IF_CLK_UP_RD
• DISP#_READ_EN
4.9.13.5 Serial Interfaces, Functional Description
The IPU supports the following types of asynchronous serial interfaces:
• 3-wire (with bidirectional data line)
• 4-wire (with separate data input and output lines)
• 5-wire type 1 (with sampling RS by the serial clock)
• 5-wire type 2 (with sampling RS by the chip select signal)
Figure 63 depicts timing of the 3-wire serial interface. The timing images correspond to active-low
DISPB_D#_CS signal and the straight polarity of the DISPB_SD_D_CLK signal.
For this interface, a bidirectional data line is used outside the device. The IPU still uses separate input and
output data lines (IPP_IND_DISPB_SD_D and IPP_DO_DISPB_SD_D). The I/O mux connects the
internal data lines to the bidirectional external line according to the IPP_OBE_DISPB_SD_D signal
provided by the IPU.
Each data transfer can be preceded by an optional preamble with programmable length and contents. The
preamble is followed by read/write (RW) and address (RS) bits. The order of the these bits is
programmable. The RW bit can be disabled. The following data can consist of one word or of a whole
burst. The interface parameters are controlled by the DI_SER_DISPn_CONF registers (n = 1, 2).
i.MX35 Applications Processors for Industrial and Consumer Products, Rev. 6
Freescale Semiconductor
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