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Application Note
BD93F10MWV Function Description
© 2021 ROHM Co., Ltd.
No. 64AN078E Rev.002
Nov.2021
GPIO Functions Description
This product requires connecting VCCIN to VDDIO to utilize
these GPIO functions. And shall not apply the voltage to
GPIOs over VDDIO (=VCCIN) voltage.
Unused pins are always fixed to Hi-Z. Therefore, both Open
and Short to GND are acceptable. Please refer to Table 1
regarding the default condition of these GPIOs after bootup.
And also refer to the BD93F10MWV Datasheet regarding the
electrical characteristic of the inputs and outputs.
●
Unused (GPIO0, GPIO1)
These terminals don
’
t be used.
●
ALERT# Function (GPIO2)
The ALERT# is NOT required in the Stand-Alone operation.
The terminal shall be Open.
●
STOPENB Function (GPIO4)
The STOPENB is NOT required in the Stand-Alone
operation. The terminal shall be short to GND directly.
●
ORIENT Function (GPIO5)
This ORIENT shall be open if it is NOT required for the
system.
The function can detect which side of CC1 or CC2 has been
connected to the port pair. The result of the detection
indicates which side of the Type-C plug is connecting to the
sink. The connection by CC1 maintains the voltage level of
the ORIENT terminal to
“
L,
”
as well as the default and the
connection by CC2 goes the ORIENT terminal to
“
H
”
as the
flipped connection. The ORIENT output is asserted when the
state is just entering Active (Type-C).
CC1
VBUS
(0V)
(5V)
ORIENT
L
Plug
Detach
Plug
Attach
CC2
L
(Connection Voltage)
t3
Assert
Timing
Figure 8. CC1 Connection of SNK / UFP
CC1
VBUS
(0V)
(5V)
ORIENT
L
Plug
Detach
Plug
Attach
CC2
H
(Connection Voltage)
t3
Assert
Timing
Figure 9. CC2 Connection of SNK / UFP
Table 5. Timing characteristic of asserting ORIENT
Parameter
Symbol
Min
Typ
Max
Unit
Asserting timing of
ORIENT
t3
100
-
550
ms
●
USBCAPB Function (GPIO8 / SDA1)
This USBCAPB informs the port pair of whether the local port
has USB communication capability or not in USBPD
negotiation communication. The terminal notifies the other
party whether the local port is capable of USB
communication. This product is connected as UFP, so the
terminal shall be set to
“
L
”
if the system enables USB
communication, if not, set this pin to
“
H
”
(connect to VDDIO).
The configuration of the function doesn
’
t affect the system
operation. However, it causes failures at the USB PD
compliance test for the finished product. Therefore, it shall
accord to the system architecture.
●
VBRDY Function (GPIO9 / SCL1)
The VBRDY shall be open if it is NOT required for the
system.
The terminal can be used to detect the start timing of the
USB communication as UFP. VBRDY is asserted to
“
H
”
when a series of the sequences of USB Type-C and PD is
completed. It is asserted when the status is entering Active
(Type-C) if the connected source cannot support USB PD
after confirming whether the source has not supported USB
PD.
Table 6. Timing characteristic of VBRDY
Parameter
Symbol
Min
Typ
Max
Unit
Asserting timing of
VBRDY
-
-
-
992
ms
