USB 2.0 Hi-Speed 3-Port Hub Controller Optimized for Portable Applications
Datasheet
2014 Microchip Technology Inc. DS00001714A-page 11
3.1 Ball Descriptions
This section provides a detailed description of each ball. The signals are arranged in functional groups
according to their associated interface.
The “_N” symbol in the signal name indicates that the active, or asserted, state occurs when the signal
is at a low voltage level. For example, RESET_N indicates that the reset signal is active low. When
“_N” is not present after the signal name, the signal is asserted when at the high voltage level.
The terms assertion and negation are used exclusively. This is done to avoid confusion when working
with a mixture of “active low” and “active high” signals. The term assert, or assertion, indicates that a
signal is active, independent of whether that level is represented by a high or low voltage. The term
negate, or negation, indicates that a signal is inactive.
Note: The buffer type for each signal is indicated in the BUFFER TYPE column of Table 3.1. A
description of the buffer types is provided in Section 3.3.
Table 3.1 Ball Descriptions
NUM
BALLS NAME SYMBOL
BUFFER
TYPE DESCRIPTION
USB/HSIC INTERFACES
1
Upstream
HSIC Data
(Flex Port 0)
DATA0 HSIC Upstream HSIC Port 0 DATA signal.
Note: The upstream Port 0 signals can be
optionally swapped with the
downstream Port 1 signals.
1
Upstream
HSIC Strobe
(Flex Port 0)
STRB0 HSIC Upstream HSIC Port 0 STROBE signal.
Note: The upstream Port 0 signals can be
optionally swapped with the
downstream Port 1 signals.
1
Downstream
USB D+
(Swap Port 1)
DP1 AIO Downstream USB Port 1 D+ data signal.
Note: The downstream Port 1 signals can be
optionally swapped with the upstream
Port 0 signals.
1
Downstream
USB D-
(Swap Port 1)
DM1 AIO Downstream USB Port 1 D- data signal.
Note: The downstream Port 1 signals can be
optionally swapped with the upstream
Port 0 signals.
1
Downstream
USB D+
(Port 2)
DP2 AIO Downstream USB Port 2 D+ data signal.
1
Downstream
USB D-
(Port 2)
DM2 AIO Downstream USB Port 2 D- data signal.
1
Downstream
HSIC Data
(Port 3)
DATA3 HSIC Downstream HSIC Port 3 DATA signal.
1
Downstream
HSIC Strobe
(Port 3)
STRB3 HSIC Downstream HSIC Port 3 STROBE signal.
