mcs7820 MosChip, mcs7820 Datasheet - Page 4

• Manufacturer Part Number: mcs7820
• Description: Usb-2.0 To Two Serial Ports
• Manufacturer: MosChip

Page 4
MCS7820
USB-2.0 to Two Serial Ports
Pin Assignments
Pin
10
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
11
1
2
3
4
5
6
7
8
9
REG06_VCC33
TEST_MODE
USB_XSCO
USB_RREF
SHTD_1_N
USB_XSCI
DCD_1_N
DTR_1_N
DSR_1_N
RTS_1_N
CTS_1_N
USB_DM
USB_DP
RI_1_N
RXD_1
TXD_1
Name
GND
GND
GND
GND
Vcc
Vcc
Vcc
Vcc
Vcc
Vcc
3IO
5A
A
A
K
K
K
A
A
K
Output
Output
Output
Output
Output
Power
Power
Power
Power
Power
Power
Power
Power
Power
Power
Power
Type
Input
Input
Input
Input
Input
Input
Input
Input
I/O
I/O
Core Ground
Crystal Oscillator Input
Crystal Oscillator Output
Power Pin (A3V3)
Analog Ground
External Reference Resistor (12.1 KΩ, 1%)
Connect resistor to Analog GND.
USB D- Signal
USB D+ Signal
Power Pin (A3V3)
Analog Ground
Power Pin (1.8V)
Test Mode Pin, (active high). Default = Low (0)
When TEST_MODE = 1, PLL, Core, and SCAN/BIST/
Memory BIST testing can be performed.
Set TEST_MODE = 0 for normal operation.
Serial Port 1 Transmit Data out to transceiver or IrDA data
out to IR LED
Serial Port 1 Data Terminal Ready (in serial protocol), active
low.
Serial Port 1 Request To Send (in serial protocol), active low.
Serial Port 1 Serial Receive Data in from transceiver or IrDA
data in from IrDA detector.
Serial Port 1 Ring Indicator, active low
Power Pin (1.8V)
Core Ground
Power Pin (D3V3)
Serial Port 1 Data Set Ready (in serial protocol), active low
Serial Port 1 Data Carrier Detect (in serial protocol), active
low
Serial Port 1 Clear To Send (in serial protocol), active low
Shut Down External Serial Transceiver during normal
operation, active low by default, can be confi gured active
high by using DCR setting.
Power Pin (3.3V OUTPUT)
Power Pin (5V INPUT)
Functional Description
Rev.
1.2