MAX3107_10 MAXIM [Maxim Integrated Products], MAX3107_10 Datasheet - Page 42

• Manufacturer Part Number: MAX3107_10
• Description: SPI/I2C UART with 128-Word FIFOs and Internal Oscillator
• Manufacturer: MAXIM [Maxim Integrated Products]

BRGConfig—Baud-Rate Generator Configuration Register
DIVLSB—Baud-Rate Generator LSB Divisor Register
DIVMSB—Baud-Rate Generator MSB Divisor Register
SPI/I
and Internal Oscillator
Bits 7 and 6: No Function
Bit 5: 4xMode
When the 4xMode bit is set high, the MAX3107 baud rate is quadruple the regular (16x sampling) baud rate. The
2xMode bit should be set low if 4xMode is enabled. See the 2x and 4x Rate Modes section for more information.
Bit 4: 2xMode
When the 2xMode bit is set high, the MAX3107 baud rate is double the regular (16x sampling) baud rate. See the 2x
and 4x Rate Modes section for a detailed description.
Bits 3–0: FRACT[3:0]
This is the fractional portion of the baud-rate generator divisor. Set FRACT[3:0] to zero if not used. See the Fractional
Baud-Rate Generator section for calculations.
DIVLSB and DIVMSB define the baud-rate generator integer divisors. The minimum value is 1. See the Fractional Baud
Rate Generator section for more information.
Bits 7–0: Div[7:0]
Div[7:0] are the 8 LSBs of the integer divisor portion (DIV) of the baud-rate generator.
Bits 7–0: Div[15:8]
Div[15:8] is the MSB portion of the integer divisor (DIV).
42
ADDRESS:
MODE:
ADDRESS:
MODE:
ADDRESS:
MODE:
RESET
RESET
RESET
NAME
NAME
NAME
_____________________________________________________________________________________
BIT
BIT
BIT
2
C UART with 128-Word FIFOs
Div15
Div7
—
7
0
7
0
7
0
0x1B
R/W
0x1C
R/W
0x1D
R/W
Div14
Div6
—
6
0
6
0
6
0
4xMode
Div13
Div5
5
0
5
0
5
0
2xMode
Div12
Div4
4
0
4
0
4
0
FRACT3
Div11
Div3
3
0
3
0
3
0
FRACT2
Div10
Div2
2
0
2
0
2
0
FRACT1
Div1
Div9
1
0
1
0
1
0
FRACT0
Div0
Div8
0
0
0
1
0
0