W83977G Winbond Electronics Corp America, W83977G Datasheet - Page 62

• Manufacturer Part Number: W83977G
• Description: W83877TF plus KBC, CIR, RTC, Pb-free
• Manufacturer: Winbond Electronics Corp America

Bit 4, 5: Reserved
Bit 3: When this bit is programmed to logic 1, the DMA mode will change from mode 0 to mode 1 if
Bit 2: Setting this bit to a logical 1 resets the TX FIFO counter logic to its initial state. This bit will be
Bit 1: Setting this bit to logical 1 resets the RX FIFO counter logic to its initial state. This bit will be
Bit 0: This bit enables the 16550 (FIFO) mode of the IR. This bit should be set to logical 1 before
Advanced IR:
Bit 7, 6:
Bit 5, 4:
Bit 3 ~0
W83977F-A/ W83977G-A/ W83977AF-A/ W83977AG-A
UFR bit 0 = 1.
cleared to logical 0 by itself after being set to logical 1.
cleared to a logical 0 by itself after being set to logical 1.
other bits of UFR can be programmed.
RXFTL1, 0
(BIT 7, 6)
TXFTL1, 0
(BIT 5, 4)
RXFTL1, 0 - Receiver FIFO Threshold Level
Its definition is the same as Legacy IR. RXTH_I becomes 1 when the Receiver FIFO
Threshold Level is equal or larger than the defined value shown as follow.
Note that the FIFO Size is selectable in SET2.Reg4.
TXFTL1, 0 - Transmitter FIFO Threshold Level
TXTH_I (Transmitter Threshold Level Interrupt) is set to 1 when the Transmitter Threshold
Level is less than the programmed value shown as follows.
Same as in Legacy IR Mode
00
01
10
11
00
01
10
11
RX FIFO THRESHOLD LEVEL
TX FIFO THRESHOLD
(FIFO SIZE: 16-BYTE)
(FIFO SIZE: 16-BYTE)
LEVEL
13
1
3
9
14
1
4
8
-54
TX FIFO THRESHOLD LEVEL
RX FIFO THRESHOLD LEVEL
(FIFO SIZE: 32-BYTE)
(FIFO SIZE: 32-BYTE)
17
25
1
7
16
26
1
4