ADuC7060
Table 92. COMIID0 MMR Bit Designations
Table 93. COMDIV2 MMR Bit Designations
Status
Clearing
Bit
Name
Description
Bits[2:1]
Bit 0
Priority
Definition
Operation
15
FBEN
Fractional baud rate generator enable bit.
00
1
No interrupt
Set by user to enable the fractional baud
11
0
1
Receive line
Read COMSTA0
rate generator.
10
01
0
0
2
3
status
interrupt
Receive buffer
full interrupt
Transmit
buffer empty
Read COMRX
Write data to
COMTX or read
14:13
12:11
FBM[1:0]
Cleared by user to generate the baud rate
using the standard 450 UART baud rate
generator.
Reserved.
M. If FBM = 0, M = 4. See Equation 2 for the
interrupt
COMIID0
calculation of the baud rate using a
00
0
4
Modem status
interrupt
Read COMSTA1
register
fractional divider and Table 85 for common
baud rate values.
10:0
UART Fractional Divider Register
This 16-bit register (COMDIV2) controls the operation of the
fractional divider for the ADuC7060.
COMDIV2 Register
Name:
COMDIV2
Address:
0xFFFF072C
Default value:
0x0000
Access:
Read and write
Rev. 0 | Page 80 of 100
FBN[10:0]
N. See Equation 2 for the calculation of the
baud rate using a fractional divider and
Table 85 for common baud rate values.
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