mcs7820 MosChip, mcs7820 Datasheet - Page 5

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

Rev.
Pin
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
1.2
EXT_CLOCK
REG02_V18
GND
DCD_2_N
DTR_2_N
DSR_2_N
RTS_2_N
CTS_2_N
Vcc
EE_SDA
EE_SCL
RI_2_N
RESET
RXD_2
TXD_2
GND
Name
GND
Vcc
GPIO
Vcc
Vcc
Gnd
18A_PLL
18A_PLL
3IO
K
K
5A
K
Output
Output
Output
Power
Power
Power
Power
Power
Power
Power
Power
Power
Type
Input
Input
Input
Input
Input
Input
Input
I/O
I/O
I/O
Ground Pin for 5V Input
Power Pin (1.8V OUTPUT)
PLL Power (1.8V)
PLL Ground
Power Pin (1.8V)
Ground.
GPIO_MODE - Bidirectional GPIO bit. The direction (Input or
Output) is controlled by the DCR for Serial Port #1.
Power-On Reset signal (active high).
2-Wire EEPROM Clock. Default = High (1)
2-Wire EEPROM Data in/out. Default = High (1)
Core Ground.
Input Clock from external world. In normal operation mode,
clock can be supplied to serial ports and used for custom
BAUD Rate of user’s choice. In test mode, clock will be the
test clock input from external world.
Power Pin (D3V3).
Serial Port 3 Transmit Data out to transceiver, or IrDA data
out to IR LED.
Serial Port 3 Data Terminal Ready (in serial protocol), active
low.
Serial Port 3 Request To Send (in serial protocol), active low.
Serial Port 3 Serial Receive Data in from transceiver, or IrDA
data in from IrDA detector.
Serial Port 3 Ring Indicator, active low.
Serial Port 3 Data Set Ready (in serial protocol), active low.
Serial Port 3 Data Carrier Detect (in serial protocol), active
low.
Serial Port 3 Clear To Send (in serial protocol), active low.
Power Pin (1.8V)
USB-2.0 to Two Serial Ports
Functional Description
MCS7820
Page 5