w83977atf Winbond Electronics Corp America, w83977atf Datasheet - Page 76
w83977atf
Manufacturer Part Number
w83977atf
Description
Winbond I/o
Manufacturer
Winbond Electronics Corp America
Datasheet
1.W83977ATF.pdf
(207 pages)
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Advanced IR:
Bit 7, 6:
Bit 5, 4:
Bit 3 ~0
4.2.4 Set0.Reg3 - IR Control Register/Set Select Register (UCR/SSR):
These two registers share the same address. In all Register Sets, Set Select Register (SSR) can be
programmed to select a desired
Set 1. In other words, writing to Reg3 in Sets other than Set 0 and Set 1 will not affect IR Control
Register. The mapping of entry Set and programming value is shown below.
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 to 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 below.
Same as in Legacy IR Mode
RXFTL1, 0
TXFTL1, 0
(Bit 7, 6)
(Bit 5, 4)
00
01
10
11
00
01
10
11
RX FIFO Threshold Level
TX FIFO Threshold Level
Set,
(FIFO Size: 16-byte)
(FIFO Size: 16-byte)
but IR Control Register can only be programmed in Set 0 and
14
13
1
4
8
1
3
9
- 57 -
RX FIFO Threshold Level
TX FIFO Threshold Level
(FIFO Size: 32-byte)
(FIFO Size: 32-byte)
Publication Release Date:April 1998
16
26
17
25
1
4
1
7
W83977ATF
PRELIMINARY
Revision 0.52
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