mcs7840 MosChip, mcs7840 Datasheet - Page 5

• Manufacturer Part Number: mcs7840
• Description: Usb-2.0 To Four Serial Ports
• Manufacturer: MosChip

Rev.
Pin
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
1.2
REG06_VCC33
REG02_V18
SHTD_1_N
GND
DSR_1_N
DCD_1_N
RTS_1_N
CTS_1_N
DTR_2_N
Vcc
EE_SDA
EE_SCL
VCC3IO
RI_1_N
RESET
RXD_1
TXD_2
GND
Name
GND
Vcc
GPIO
Vcc
Vcc
Vcc
18A_PLL
18A_PLL
3IO
5A
K
K
5A
K
Output
Output
Output
Output
Power
Power
Power
Power
Power
Power
Power
Power
Power
Power
Power
Type
Input
Input
Input
Input
Input
I/O
I/O
I/O
I
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)
Ground Pin for 5V Input
Power Pin (1.8V OUTPUT)
PLL Power (1.8V)
PLL Ground
Power Pin (1.8V)
Power pin D3V3.
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)
Serial Port 2 Transmit Data out to transceiver, or IrDA
data out to IR LED
Serial Port 2 Data Terminal Ready (in serial protocol),
active low.
Functional Description
USB-2.0 to Four Serial Ports
MCS7840
Page 5