Cypress Semiconductor FX2LP Technical Information Seite 410

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EZ-USB FX2 Technical Reference Manual
Page 15-90 EZ-USB FX2 Technical Reference Manual v2.1
CTLx Bit: specifies the state to set each CTLx signal to during this entire State.
1 = High level
If the CTLx bit in the GPIFCTLCFG register is set to 1, the output driver will be an
open-drain.
If the CTLx bit in the GPIFCTLCFG register is set to 0, the output driver will be driven
to CMOS levels.
0 = Low level
defined by FLOWEQxCTL and these bits, instead:
TRICTL (GPIFCTLCFG.7), as described in Section 10.2.3.1, "Control Output Modes".
GPIFCTLCFG[5:0].
The combination of these bits defines CTL5:0 during a Flow State as follows:
If TRICTL is 0, FLOWEQxCTL[5:0] directly represent the output states of CTL5:0 during
the Flow State. The GPIFCTLCFG[5:0] bits determine whether the CTL5:0 outputs are
CMOS or open-drain: If GPIFCTLCFG.x = 0, CTLx is CMOS; if GPIFCTLCFG.x = 1, CTLx
is open-drain.
If TRICTL is 1, FLOWEQxCTL[7:4] are the output enables for the CTL[3:0] signals, and
FLOWEQxCTL[3:0] are the output values for CTL[3:0]. CTL4 and CTL5 are unavailable in
this mode.
Table 15-17 illustrates this relationship.
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