mcs7717 MosChip, mcs7717 Datasheet - Page 6

• Manufacturer Part Number: mcs7717
• Description: Three Port Usb Hub With 1 Serial, 1 Printer
• Manufacturer: MosChip

Page 6
MCS7717
Three Port USB Hub with 1 Serial, 1 Printer
nUSB2PWR
nAUTOFDX
nSTROBE
Pin Name
nUSB2OV
nFAULT
VOUT
nDTR
nCTS
nINIT
DM2
GND
3.3V
PD1
PD0
DP2
nRI
5V
10,21,41,53,64
27,38,49,59
3,6,7,14,
Pin
46
47
48
50
51
52
54
55
56
57
58
60
61
62
63
Note: All names with “n” prefix are active low.
Type
PWR
PWR
PWR
PWR
I/O
I/O
I/O
I/O
I/O
I/O
I/O
O
O
I
I
I
I
Initialize the peripheral/printer (open drain).
When set low, the peripheral/printer starts its initialization routine.
Parallel printer port Data bit 1.
Peripheral/Printer data error (internal pull-up).
This pin is set low by the peripheral/printer during an error
condition.
Parallel printer port Data bit 0.
Peripheral/Printer Auto Feed (open-drain).
Continuous autofed paper is selected when this pin is set low.
Peripheral/Printer data Strobe (open drain).
Data is latched into the peripheral/printer when the nSTROBE is
low.
Downstream USB Port-2 differential Data Plus (D+).
Downstream USB Port-2 differential Data Minus (D-).
Clear-To-Send signal.
When low, this indicates that the modem or data set is ready to
exchange data. nCTS has no effect on the transmitter.
Data-Terminal-Ready signal.
It is set high (inactive) after a hardware reset or during internal
loop-back mode. When low, this output indicates to the modem or
data set that the UART is ready to establish a communication link.
nDTR has no effect on the transmitter or receiver.
Ring-In detect signal.
Over-Current signal from external power management circuit for
USB expansion Port-2. This signal indicates that this external
circuit has sensed an Over-Current condition.
Power-On signal to external power management circuit for USB
expansion Port-2. This is a signal to apply power to the interface.
In the presence of an Over-Current sense, this output is driven
high (open drain output, 6 mA max). It can be used as a status
indicator, connected to an LED through a 330Ω resistor.
+3.3V Voltage Regulator Output.
Power and Signal Ground.
Device Supply Inputs.
All should be connected to the VOUT pin.
VOUT voltage is gated by RESET.
Main Power Input.
Connect to USB VBUS or local VDD.
Description
Rev. 1.7