I/O States
BCM43907 Preliminary Data Sheet
Section 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
Out-of-Reset; Before
Software Download
(REG_ON Held Low) (REG_ON High)
Low Power State/Sleep Power-downb
(All Power Present)
Ball Name
I/O Keepera Active Mode
Power Rail
HIB_REG_ON_IN I
N
N
Y
Input; PD (Pull-down can Input; PD (Pull-down can Input
be disabled.) be disabled.)
Input
–
REG_ON
I
Input; PD (Pull-down can Input; PD (Pull-down can Input; PD (of 200 kΩ)
be disabled.) be disabled.)
Input; PD (of 200 kΩ)
–
CLK_REQ
I/O
Open drain or push-pull Open drain or push-pull High-Z, NoPull
(programmable). Active (programmable). Active
Open drain; active high VDDO
high.
high.
GPIO_0
GPIO_1
GPIO_2
I/O
I/O
I/O
Y
Y
Y
Input/Output; PU, PD, or Input/Output; PU, PD, or High-Z, NoPull
NoPull (programmable NoPull (programmable
Input; PD
VDDIO
VDDIO
VDDIO
[Default: PD])
[Default: PD])
Input/Output; PU, PD, or Input/Output; PU, PD, or High-Z, NoPull
NoPull (programmable NoPull (programmable
Input; NoPull
Input; NoPull
[Default: NoPull])
[Default: NoPull])
Input/Output; PU, PD, or Input/Output; PU, PD, or High-Z, NoPull
NoPull (programmable NoPull (programmable
[Default: NoPull])
[Default: NoPull])
Broadcom®
March 12, 2016 • 43907-DS104-R
Page 71
BROADCOM CONFIDENTIAL
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