w83977f Winbond Electronics Corp America, w83977f Datasheet - Page 81

• Manufacturer Part Number: w83977f
• Description: Plug & Play 1.0a Compliant
• Manufacturer: Winbond Electronics Corp America

Bit 4:
Bit 3:
Bit 2:
Bit 1:
Bit 0:
4.7.6 Set5.Reg6, 7 - Receiver Frame Length FIFO (RFLFL/RFLFH) or Lost Frame Number
(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.
4.8 Set6 - IR Physical Layer Control Registers
RFLFL/ LST_NU
Address Offset Register Name
Reset Value
Reset Value
RFLFH
Reg.
0
1
2
3
4
5
6
7
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 receive a bad CRC 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
-
Reserved
Reserved
Reserved
HIR_FNU
IR_CFG2
MIR_PW
SIR_PW
SSR
Bit 6
Bit 6
0
0
-
This bit is in frame status FIFO bottom and is valid only when
Infrared Configure Register 2
MIR (1.152M bps or 0.576M bps) Pulse Width
SIR Pulse Width
Sets Select Register
High Speed Infrared Flag Number
Bit 5
Bit 5
0
0
-
- 69 -
Bit 12
Bit 4
Bit 4
0
0
Register Description
W83977F/ W83977AF
Bit 11
Publication Release Date: March 1998
Bit 3
Bit 3
0
0
-
-
-
Bit 10
Bit 2
Bit 2
0
0
PRELIMINARY
Bit 1
Bit 1
Bit 9
0
0
Revision 0.58
Bit 0
Bit 0
Bit 8
0
0