Technical data

Electrical Characteristics
MCIMX31C/MCIMX31LC Technical Data, Rev. 4.3
Freescale Semiconductor 49
Figure 40 depicts the setup and hold requirements of the trace data pins with respect to TRACECLK, and
Table 38 lists the timing parameters.
Figure 40. Trace Data Timing Diagram
4.3.10.1 Half-Rate Clocking Mode
When half-rate clocking is used, the trace data signals are sampled by the TPA on both the rising and
falling edges of TRACECLK, where TRACECLK is half the frequency of the clock shown in Figure 40.
4.3.11 FIR Electrical Specifications
FIR implements asynchronous infrared protocols (FIR, MIR) that are defined by IrDA
®
(Infrared Data
Association). Refer to http://www.IrDA.org for details on FIR and MIR protocols.
4.3.12 Fusebox Electrical Specifications
Table 37. ETM TRACECLK Timing Parameters
ID Parameter Min Max Unit
T
cyc
Clock period Frequency dependent — ns
T
wl
Low pulse width 2 — ns
T
wh
High pulse width 2 — ns
T
r
Clock and data rise time — 3 ns
T
f
Clock and data fall time — 3 ns
Table 38. ETM Trace Data Timing Parameters
ID Parameter Min Max Unit
T
s
Data setup 2 — ns
T
h
Data hold 1 — ns
Table 39. Fusebox Timing Characteristics
Ref. Num Description Symbol Minimum Typical Maximum Units
1 Program time for eFuse
1
1
The program length is defined by the value defined in the epm_pgm_length[2:0] bits of the IIM module. The value to program
is based on a 32 kHz clock source (4 * 1/32 kHz = 125 µs)
t
program
125 — — µs