mcs7705 MosChip, mcs7705 Datasheet - Page 4

• Manufacturer Part Number: mcs7705
• Description: Usb 1.1 To Single Printer Port
• Manufacturer: MosChip

Page 4
MCS7705
USB 1.1 to Single Printer Port
Pin Assignments
TSTMODE
Pin Name
TSTPLL
RESET
XTAL1
XTAL2
BUSY
SLCT
nACK
PD7
PD6
PD5
PD4
PD3
DM
DP
PE
Pin
10
12
22
23
24
25
26
27
29
32
33
3
4
6
7
9
Type
I/O
I/O
I/O
I/O
I/O
I/O
I/O
O
I
I
I
I
I
I
I
I
Crystal Oscillator input, or External Clock input pin (6 MHz).
This signal input is used in conjunction with XTAL2 to form a
feedback circuit for the internal timing. Two (10 pF) external
capacitors connected from each side of the crystal to GND are
required to form a Crystal Oscillator.
Crystal Oscillator output. See XTAL1 description.
Test Mode (active low, internal pull-up).
When this pin is tied to GND, the internal PLL is bypassed and an
external 48 MHz clock is used as the reference clock.
Internal Test Mode (active low, internal pull-up).
When this pin is tied to GND, the Internal Test Mode is enabled.
Upstream USB port differential Data Minus (D-), analog.
Upstream USB port differential Data Plus (D+), analog.
System Reset (active high).
Resets all internal registers, sequencers, and signals to a consistent
state. Connect to GND to use the internal Power-On-Reset circuit.
Peripheral/Printer Selected (internal pull-up).
This pin is set high by the peripheral/printer when it is selected.
Paper Empty (internal pull-up).
This pin is set high by the peripheral/printer when printer paper is
empty.
Peripheral/Printer Busy (internal pull-up).
This pin is set high by the peripheral/printer when the printer or
peripheral is not ready to accept data.
Peripheral/Printer data Acknowledge (internal pull-up).
This pin is set low by the peripheral/printer to indicate a successful
data transfer has taken place.
Parallel printer port Data bit 7.
Parallel printer port Data bit 6.
Parallel printer port Data bit 5.
Parallel printer port Data bit 4.
Parallel printer port Data bit 3.
Description
Rev. 1.7