PRELIMINARY
CYW54907
12. I/O States
Table 14 provides I/O state information for the signals listed.
The following notations are used in Table 14:
■ I: Input signal
■ O: Output signal
■ I/O: Input/Output signal
■ PU = Pulled up
■ PD = Pulled down
■ NoPull = Neither pulled up nor pulled down
Table 14. I/O States
Power-
downb(REG_ON
Held Low)
Out-of-Reset; Before
Software Download
(REG_ON High)
Low Power State/Sleep (All Power
Present)
Power
Rail
Ball Name
I/O Keepera
Active Mode
HIB_REG_ON_IN
REG_ON
I
I
N
N
Input; PD (Pull-down can be disabled.) Input; PD (Pull-down can be disabled.) Input
Input
–
Input; PD (Pull-down can be disabled.) Input; PD (Pull-down can be disabled.) Input; PD (of 200 kΩ) Input; PD (of 200 kΩ)
–
CLK_REQ
I/O
I/O
I/O
I/O
I/O
I/O
I/O
Y
Y
Y
Y
Y
Y
Y
Open drain or push-pull (program-
mable). Active high.
Open drain or push-pull (program-
mable). Active high.
High-Z, NoPull
High-Z, NoPull
High-Z, NoPull
High-Z, NoPull
High-Z, NoPull
High-Z, NoPull
High-Z, NoPull
Open drain; active
high
VDDO
GPIO_0
GPIO_1
GPIO_2
GPIO_3
GPIO_4
GPIO_5
Input/Output; PU, PD, or NoPull
(programmable [Default: PD])
Input/Output; PU, PD, or NoPull
(programmable [Default: PD])
Input; PD
VDDIO
VDDIO
VDDIO
VDDIO
VDDIO
VDDIO
Input/Output; PU, PD, or NoPull
(programmable [Default: NoPull])
Input/Output; PU, PD, or NoPull
(programmable [Default: NoPull])
Input; NoPull
Input; NoPull
Input; PD
Input/Output; PU, PD, or NoPull
(programmable [Default: NoPull])
Input/Output; PU, PD, or NoPull
(programmable [Default: NoPull])
Input/Output; PU, PD, or NoPull
(programmable [Default: PD])
Input/Output; PU, PD, or NoPull
(programmable [Default: PD])
Input/Output; PU, PD, or NoPull
(programmable [Default: NoPull])
Input/Output; PU, PD, or NoPull
(programmable [Default: NoPull])
Input; NoPull
Input; PD
Input/Output; PU, PD, or NoPull
(programmable [Default: PD])
Input/Output; PU, PD, or NoPull
(programmable [Default: PD])
Document Number: 002-19312 Rev. *C
Page 48 of 95
CYPRESS [ CYPRESS ]
