IMX53CEC datasheet(109/204 Pages) FREESCALE

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Electrical Characteristics

i.MX53xD Applications Processors for Consumer Products, Rev. 2

Freescale Semiconductor

109

4.7.11

Pulse Width Modulator (PWM) Timing Parameters

This section describes the electrical information of the PWM. The PWM can be programmed to select one

of three clock signals as its source frequency. The selected clock signal is passed through a prescaler before

being input to the counter. The output is available at the pulse-width modulator output (PWMO) external

pin.

Figure 62 depicts the timing of the PWM, and Table 69 lists the PWM timing parameters.

Figure 62. PWM Timing

Table 68. WR1 /RD Timing Parameters

Parameter

Symbol

Min

Typ

Max

Unit

OW7

Write 1 Low Time

tLOW1

µs

OW8

Transmission Time Slot

tSLOT

117

120

µs

Read Data Setup

tSU

——

µs

OW9

Read Low Time

tLOWR

µs

OW10

Read Data Valid

tRDV

—15

—

µs

OW11

Release Time

tRELEASE

0—

µs

Table 69. PWM Output Timing Parameter

Ref. No.

Parameter

Min

Max

Unit

System CLK frequency1

1 CL of PWMO = 30 pF

ipg_clk

MHz

Clock high time

12.29

—

Clock low time

9.91

—

Clock fall time

—

0.5

Clock rise time

—

0.5

Output delay time

—

9.37

Output setup time

8.71

—

System Clock

PWM Output

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