W90N745CD/W90N745CDG
6.10.4 UART3
UART3 is a general UART block. It is same as the UART in W90N740 but with some Modem I/O
signals.
More detail general UART function description, please refer to next section 7.10.5 General UART
controller.
Table 6.10.5 UART3 register map
REGISTER
ADDRESS
R/W
OTHER CONDITION
RESET VALUE
UART3_RBR
UART3_THR
UART3_IER
UART3_DLL
UART3_DLM
UART3_IIR
0xFFF8_0300
0xFFF8_0300
0xFFF8_0304
0xFFF8_0300
0xFFF8_0304
0xFFF8_0308
0xFFF8_0308
0xFFF8_030c
0xFFF8_0310
0xFFF8_0314
0xFFF8_0318
0xFFF8_031c
R
W
DLAB=0
DLAB=0
DLAB=0
DLAB=1
DLAB=1
Undefined
Undefined
R/W
R/W
R/W
R
0x0000_0000
0x0000_0000
0x0000_0000
0x8181_8181
Undefined
UART3_FCR
UART3_LCR
UART3_MCR
UART3_LSR
UART3_MSR
UART3_TOR
W
R/W
R/W
R
0x0000_0000
0x0000_0000
0x6060_6060
0x0000_0000
0x0000_0000
R
R/W
UART3 Modem Control Register (UART3_MCR)
REGISTER
ADDRESS
R/W
DESCRIPTION
RESET VALUE
0xFFF8_0310 R/W UART 3 Modem Control Register
0x0000_0000
UART3_MCR
31
23
15
7
30
22
14
6
29
21
13
5
28
20
12
4
27
19
11
3
26
18
10
2
25
24
16
8
Reserved
17
9
Reserved
Reserved
1
0
Reserved Reserved Reserved
LBME
Reserved Reserved Reserved
DTR#
Note: UART3_MCR is subset of MCR in W90N745. Please refer to section 7.10.5 ‘General UART Controller’.
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