w83977atf Winbond Electronics Corp America, w83977atf Datasheet - Page 92
w83977atf
Manufacturer Part Number
w83977atf
Description
Winbond I/o
Manufacturer
Winbond Electronics Corp America
Datasheet
1.W83977ATF.pdf
(207 pages)
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Bit 7:
Bit 6:
Bit 5:
Bit 4:
Bit 3:
Bit 2:
Bit 1:
Bit 0:
(LST_NU)
Receiver Frame Length FIFO (RFLFL/RFLFH):
These are combined to be a 13-bit register. Reading these registers returns received byte count for
the frame. When read, the register of RFLFH will pop-up another frame status and frame length if
FSFDR=1 (Set5.Reg4.Bit7).
Lost Frame Number (LST_NU):
When LST_FR=1 (Set5.Reg4.Bit6), Reg6 stands for LST_NU which is a 8-bit register holding the
number of frames lost in succession.
RFLFL/ LST_NU
4.7.6 Set5.Reg6, 7 - Receiver Frame Length FIFO (RFLFL/RFLFH) or Lost Frame Number
Reset Value
Reset Value
RFLFH
Reg.
FSFDR - Frame Status FIFO Data Ready
Indicates that a data byte is valid in frame status FIFO bottom.
LST_FR - Lost Frame
Set to 1 when one or more frames have been lost.
Reserved.
MX_LEX - Maximum Frame Length Exceed
Set to 1 when incoming data exceeds programmed maximum frame length defined in
Set4.Reg6 and Set4.Reg7. This bit is in frame status FIFO bottom and is valid only when
FSFDR=1 (Frame Status FIFO Data Ready).
PHY_ERR - Physical Error
When receiving data, any physical layer error as defined in IrDA 1.1 will set this bit to 1.
This bit is in frame status FIFO bottom and is valid only when FSFDR=1 (Frame Status
FIFO Data Ready).
CRC_ERR - CRC Error
Set to 1 when a bad CRC is received in a frame. This CRC belongs to physical layer as
defined in IrDA 1.1.
FSFDR=1 (Frame Status FIFO Data Ready).
RX_OV - Received Data Overrun
Set to 1 when receiver FIFO overruns.
FSF_OV - Frame Status FIFO Overrun
Set to 1 When frame status FIFO overruns.
Bit 7
Bit 7
0
0
-
Bit 6
Bit 6
0
0
-
This bit is in frame status FIFO bottom and is valid only when
Bit 5
Bit 5
0
0
-
- 73 -
Bit 12
Bit 4
Bit 4
0
0
Bit 11
Bit 3
Bit 3
0
0
Publication Release Date:April 1998
Bit 10
Bit 2
Bit 2
0
0
W83977ATF
PRELIMINARY
Bit 1
Bit 1
Bit 9
0
0
Revision 0.52
Bit 0
Bit 0
Bit 8
0
0
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