mcs7715 MosChip, mcs7715 Datasheet - Page 16
mcs7715
Manufacturer Part Number
mcs7715
Description
Usb 1.1 To Single Uart And Printer Port
Manufacturer
MosChip
Datasheet
1.MCS7715.pdf
(34 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
mcs7715CQ-GR
Manufacturer:
MOSCHIP
Quantity:
443
Part Number:
mcs7715CQ-GR
Manufacturer:
MOSCHIP
Quantity:
20 000
Page 16
MCS7715
USB 1.1 to Single UART and Printer Port
FIFO Control Register:
The FCR controls the UART behavior in various modes.
Register:
Description:
Offset:
Permissions:
FCR[7:6] RHR Trigger Level:
In 550 mode, the receiver FIFO trigger levels are
defined using FCR[7:6]. The interrupt trigger level &
flow control trigger level where appropriate are defined
by L2 in the table below. L1 defines lower flow control
trigger levels that introduce a hysteresis element in
hardware RTS/CTS flow control.
In Byte Mode (450 Mode) the trigger levels are all set
to 1.
5, 4
7, 6
Bit
0
1
2
3
Bit[7]
Trigger Level
Trigger Level
FIFO Mode
Reserved
Reserved
RHR
Enable
Name
Flush
Flush
RHR
RHR
THR
FCR
FIFO Control Register
010
Write
Bit[6]
Logic 0 = Byte Mode
Logic 1 = FIFO Mode
Logic 0 = No change
Logic 1 = Flushes the contents of RHR. This is operative only in FIFO
Logic 0 = No change
Logic 1 = Flushes the content of the THR, in the same manner as FCR[1]
Reserved
Reserved
See the table below.
Bit[5]
Mode. The RHR is automatically flushed whenever changing
between Byte Mode and FIFO Mode. The bit will return to zero
after clearing the FIFOs.
does the RHR
Reserved
Bit[4]
Reserved
Bit[3]
FCR[7:6]
Description
2’b00
2’b01
2’b10
2’b11
Bit[2]
Flush
THR
L1
1
1
1
1
(FIFO = 16)
Bit[1]
Flush
550 Mode
RHR
L2
14
Enable
1
4
8
Bit[0]
FIFO
Rev. 1.6