PRELIMINARY
CYW43340
Table 20. I/O States (Cont.)
(WL_REG_ON=0
and
Before SW Download (WL_REG_ON=1 and BT_REG_ON=1)
Power-down
(BT_REG_ON and
WL_REG_ON
Held Low)
Out-of-Reset;
Low Power State/
Sleep
(All Power Present)
(BT_REG_ON=1;
WL_REG_ON=1)
BT_REG_ON=0) and and VDDIOs Are
VDDIOs Are Present Present
Power
Rail
Name
I/O Keeper Active Mode
GPIO_4
I/O
Y
jtag_sel=1 PU;
jtag_sel=0 PD
jtag_sel=1 PU;
jtag_sel=0 PD
NoPull
jtag_sel=1 PU;
jtag_sel=0 PD
jtag_sel=1 PU;
jtag_sel=0 PD
jtag_sel = 1 PU;
jtag_sel = 0 PD
WL_VDDI
O
GPIO_5
GPIO_6
GPIO_12
I/O
I/O
I/O
Y
Y
Y
NoPull
PD
NoPull
PD
NoPull
NoPull
NoPull
NoPull
PD
NoPull
PD
NoPull
WL_VDDI
O
PD
WL_VDDI
O
jtag_sel=1 PU;
jtag_sel=0 PD
jtag_sel=1 PU;
jtag_sel=0 PD
jtag_sel=1 PU;
jtag_sel=0 PD
jtag_sel=1 PU;
jtag_sel=0 PD
PU
WL_VDDI
O
1. Keeper column: N=pad has no keeper. Y=pad has a keeper. Keeper is always active except in Power-down state.
2. If there is no keeper, and it is an input and there is Nopull, then the pad should be driven to prevent leakage due to floating pad (e.g., SDIO_CLK).
3. In the Power-down state (xx_REG_ON=0): High-Z; NoPull => the pad is disabled because power is not supplied.
4. Depending on whether the PCM interface is enabled and the configuration of PCM is in master or slave mode, it can be either output or input.
2
2
5. Depending on whether the I S interface is enabled and the configuration of I S is in master or slave mode, it can be either output or input.
6. GPIO_6 is input-only during the Low-Power and Deep-Sleep modes.
7. GPIO_0 through GPIO_5 and GPIO_12 can be configured to operate as inputs or outputs in Deep-Sleep mode before entering the mode.
8. The GPIO pull states for the Active and Low-Power states are hardware defaults. They can all be subsequently programmed as pull-ups or pull-downs.
9. Regarding GPIO pins, the following are the pull-up and pull-down values for both 3.3V and 1.8V VDDIO:
Minimum (kΩ)
Typical (kΩ)
Maximum (kΩ)
3.3V VDDIO, Pull-downs:
3.3V VDDIO, Pull-ups:
1.8V VDDIO, Pull-downs:
1.8V VDDIO, Pull-ups:
51.5
37.4
64
44.5
39.5
83
38
44.5
116
118
65
86
Document Number: 002-14943 Rev. *L
Page 56 of 96
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