Rainbow Electronics W90N745CDG - Manual (Page 263)

W90N745CD/W90N745CDG
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BITS DESCRIPTIONS
[31:3] Reserved -
[2:0] 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
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
REGISTER ADDRESS R/W
OTHER
CONDITION
RESET VALUE
UART2_RBR 0xFFF8_0200 R DLAB=0 Undefined
UART2_THR 0xFFF8_0200 W DLAB=0 Undefined
UART2_IER 0xFFF8_0204 R/W DLAB=0 0x0000_0000
UART2_DLL 0xFFF8_0200 R/W DLAB=1 0x0000_0000
UART2_DLM 0xFFF8_0204 R/W DLAB=1 0x0000_0000
UART2_IIR 0xFFF8_0208 R 0x8181_8181
UART2_FCR 0xFFF8_0208 W Undefined
UART2_LCR 0xFFF8_020c R/W 0x0000_0000
Reserved 0xFFF8_0210 Undefined
UART2_LSR 0xFFF8_0214 R 0x6060_6060
Reserved 0xFFF8_0218 Undefined
UART2_TOR 0xFFF8_021c R/W 0x0000_0000
UART2_IRCR 0xFFF8_0220 R/W 0x0000_0040
UART2 IrDA Control Register (UART2_IRCR)
REGISTER ADDRESS R/W DESCRIPTION RESET VALUE
UART2_IRCR 0xFFF8_0220 R/W UART 2 IrDA Control Register 0x0000_0040