W83877ATF Datasheet, PDF (67/191 Pages) Winbond – enhanced version from Winbonds most popular I/O chip W83877F

W83877ATF
Bit 7~6:
Bit 5~0:
Reserved, Read 0.
Reading these bits will return the current transmitter FIFO depth, that is, how many bytes
there are in the transmitter FIFO.
4.3.4.6 Reg7 - Receiver FIFO Depth (RXFDTH) (Read Only)
Mode
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Advanced 0
UART
Reset Value
0
0
RXFD5 RXFD4 RXFD3
0
0
0
0
Bit 2
RXFD2
0
Bit 1
RXFD1
0
Bit 0
RXFD1
0
Bit 7~6:
Bit 5~0:
Reserved, Read 0.
Read these bits will return the current receiver FIFO depth, that is, how many bytes there
are in the receiver FIFO.
4.3.5 Set3 - Version ID and Mapped Control Registers
Address Register Name
Offset
Register Description
0
AUID
Advanced UART ID
1
MP_UCR Mapped UART Control Register
2
MP_UFR Mapped UART FIFO Control Register
3
SSR
Sets Select Register
4
Reversed
-
5
Reserved
-
6
Reserved
-
7
Reserved
-
4.3.5.1 Reg0 - Advanced UART ID (AUID)
This register is read only. Indicates advanced UART version ID. Read it and return 1X₁₆.
4.3.5.2 Reg1 - Mapped UART Control Register (MP_UCR)
Read only. Reading this register that returns UART Control Register value of Set 0.
- 63 -
Publication Release Date: April 1998
Version 0.51