W83977F Datasheet, PDF (81/181 Pages) Winbond – PLUG & PLAY 1.0A COMPLIANT

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