Cypress CY7C68003 manual TX2UL 20-Pin CPS Package Operation Modes

CY7C68003

Operation Modes

There are six operation modes available in TX2UL. They are:

■Normal Operation Mode

■Configuration Mode

■ULPI Low Power Mode

■Sleep Mode

■Carkit UART Pass Through Mode

■Tri-state ULPI Interface Output Mode (only available in 24-pin QFN package)

When changing the operation modes, if the current and changing modes are not the Normal Operation Mode, TX2UL first changes to the Normal Operation Mode. For example, to change from ULPI Low power mode to Sleep mode, TX2UL changes to

Normal operation mode first, and then changes to Sleep mode. The Mode Change State diagram in Figure 3 shows the mode change path of TX2UL. The entries of the six operations modes (20-pin CSP package has 5 operation modes) are listed in Table 4 and Table 5. There are three mode change transactions that require the RESET_N assert or deassert with tSTATE (see Table 21 on page 19 for tSTATE). These three mode change transactions are:

■Change from Normal Operation Mode to Configuration Mode

–RESET_N is required to assert with tSTATE

■Change from Configuration Mode to Normal Operation Mode

–RESET_N is required to de-assert with tSTATE

■Change from Normal Operation Mode to Sleep Mode – RESET_N is required to assert with tSTATE

	Figure 3. Mode Change State Diagram
Sleep Mode	Carkit UART Pass Through	Tri-State ULPI Interface
	Mode	Output Mode (available in 24-
		pin QFN package only)

Normal Operation Mode

Configuration Mode ULPI Low Power Mode

Table 4. TX2UL 20-Pin CPS Package Operation Modes

RESET_N	Mode
0 (Low)	Sleep Mode
1 (High)	Normal Operation Mode
1 (High)	Enter into ULPI Low Power Mode by setting Sus-
	pendM register bit (in Function Control Register) to
	0 during the Normal Operation Mode.
1 (High)	Enter into Carkit UART Pass Through Mode by set-
	ting Carkit Mode register bit (in Interface Control
	Register) to 1 during the Normal Operation Mode.
0 (Low)	Enter into Configuration Mode
when
Power On
(VCC On)

Table 5. TX2UL 24-Pin QFN Package Operation Modes

CS_N	RESET_N	Mode
0 (Low)	0 (Low)	Sleep Mode
0 (Low)	1 (High)	Normal Operation Mode
0 (Low)	1 (High)	Enter into ULPI Low Power Mode
		by setting SuspendM register bit (in
		Function Control Register) to 0 dur-
		ing the Normal Operation Mode.
0 (Low)	1 (High)	Enter into Carkit UART Pass
		Through Mode by setting Carkit
		Mode register bit (in Interface Con-
		trol Register) to 1 during the Nor-
		mal Operation Mode.
1 (High)	0 (Low)	Configuration Mode
1 (High)	1 (High)	Tri-state ULPI Interface output pins

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