mcs7840 MosChip, mcs7840 Datasheet - Page 11

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

Rev.
Interrupt Enable Register (IER):
Serial channel interrupts are enabled using the Interrupt Enable Register (IER).
Register:
Description:
Offset:
Permissions:
Access Condition:
Default Value:
1.2
Bit[7]
[7:5]
Bit
0
1
2
3
4
IER
Interrupt Enable Register
1
Read/Write
LCR[7] = 0
0x0C
Reserved
Bit[6]
Interrupt Mask
Interrupt Mask
Interrupt Mask
Interrupt Mask
Description
Sleep Mode
Reserved
Modem
Rx Rdy
Rx Stat
Tx Rdy
Bit[5]
Logic 0: Disable the Receiver Ready Interrupt
Logic 1: Enable the Receiver Ready Interrupt
Logic 0: Disable the Transmitter Ready Interrupt
Logic 1: Enable the Transmitter Ready Interrupt
Logic 0: Disable the Receiver Status Interrupt
Logic 1: Enable the Receiver Status Interrupt
Logic 0: Disable the Modem Status Interrupt
Logic 1: Enable the Modem Status Interrupt
Logic 0: Disable Sleep Mode
Logic 1: Enable Sleep Mode where by the internal clock
Bit[4]
Sleep
Mode
(Normal Mode)
(Normal Mode)
of the channel is switched OFF
Int Mask
Modem
Bit[3]
USB-2.0 to Four Serial Ports
Operation
Reserved
Int Mask
Rx Stat
Bit[2]
MCS7840
Int Mask
Tx Rdy
Bit[1]
Int Mask
Rx Rdy
Bit[0]
Page 11