W90N745CD/W90N745CDG
BITS
DESCRIPTIONS
[31:3]
Reserved
UBCR
-
UBCR is a 3 bits register which is used to select clock source to
generate suitable baud rate:
000: 15Mhz from external crystal
100: 30Mhz divided from PLL 480Mhz
101: 43.6Mhz divided from PLL 480Mhz
110: 48Mhz divided from PLL 480Mhz
111: 60Mhz divided from PLL 480Mhz
[2:0]
6.10.3 UART2
UART2 contains 2 features: general UART and IrDA SIR decoder/encoder. UART is same as the
UART of W90N740 but without modem function. Please read the spec of section 7.10.5 General
UART controller function description. The IrDA SIR is described as follow:
Table 6.10.4 UART2 Register Map
OTHER
REGISTER
ADDRESS
R/W
RESET VALUE
CONDITION
DLAB=0
DLAB=0
DLAB=0
DLAB=1
DLAB=1
UART2_RBR
UART2_THR
UART2_IER
UART2_DLL
UART2_DLM
UART2_IIR
UART2_FCR
UART2_LCR
Reserved
0xFFF8_0200
0xFFF8_0200
0xFFF8_0204
0xFFF8_0200
0xFFF8_0204
0xFFF8_0208
0xFFF8_0208
0xFFF8_020c
0xFFF8_0210
0xFFF8_0214
0xFFF8_0218
0xFFF8_021c
0xFFF8_0220
R
W
Undefined
Undefined
R/W
R/W
R/W
R
0x0000_0000
0x0000_0000
0x0000_0000
0x8181_8181
Undefined
W
R/W
0x0000_0000
Undefined
UART2_LSR
Reserved
R
0x6060_6060
Undefined
UART2_TOR
UART2_IRCR
R/W
R/W
0x0000_0000
0x0000_0040
UART2 IrDA Control Register (UART2_IRCR)
REGISTER
ADDRESS
R/W
DESCRIPTION
RESET VALUE
0xFFF8_0220 R/W UART 2 IrDA Control Register
0x0000_0040
UART2_IRCR
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