CY7C68003
Page 4 of 5
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
Normal Operation Mode
Tri-State ULPI Interface
Output Mode (available in 24-
pin QFN package only)
Sleep Mode
ULPI Low Power Mode
Configuration Mode
Carkit UART Pass Through
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)
when
Power On
(VCC On)
Enter into Configuration Mode
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
