ADUC7122 Analog Devices, ADUC7122 Datasheet - Page 58

• Manufacturer Part Number: ADUC7122
• Description: Precision Analog Microcontroller, 12-Bit Analog I/O, ARM7TDMI® MCU
• Manufacturer: Analog Devices

Specifications of ADUC7122

• Mcu Core: ARM7 TDMI
• Mcu Speed (mips): 40
• Sram (bytes): 8192Bytes
• Gpio Pins: 32
• Adc # Channels: 13

ADuC7122
UART Interrupt Enable Register 0
Name:
Address:
Default Value:
Access:
Function:
Table 98. COMIEN0 MMR Bit Designations
Bit
7:4
3
2
1
0
UART Interrupt Identification Register 0
Name:
Address:
Default Value:
Access:
Function:
Name
EDSSI
ELSI
ETBEI
ERBFI
COMIEN0
0xFFFF0804
0x00
Read/write
The 8-bit register enables and disables the
individual UART interrupt sources.
COMIID0
0xFFFF0808
0x01
Read only
This 8-bit register reflects the source of the
UART interrupt.
Description
Reserved. Not used.
Modem status interrupt enable bit.
Set by the user to enable generation of an
interrupt if any of COMSTA0[3:1] are set.
Cleared by the user.
RxD status interrupt enable bit.
Set by the user to enable generation of an
interrupt if any of the COMSTA0[3:1] register
bits are set.
Cleared by the user.
Enable transmit buffer empty interrupt.
Set by the user to enable an interrupt when the
buffer is empty during a transmission, that is,
when COMSTA[5] is set.
Cleared by the user.
Enable receive buffer full interrupt.
Set by the user to enable an interrupt when the
buffer is full during a reception.
Cleared by the user.
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Table 99. COMIID0 MMR Bit Designations
Bits[2:1]
Status
Bits
00
11
10
01
00
UART Fractional Divider Register
This 16-bit register controls the operation of the fractional
divider for the ADuC7122.
Name:
Address:
Default Value:
Access:
Table 100. COMDIV2 MMR Bit Designations
Bit
15
14:13
12:11
10:0
FBEN
Name
FBM[1:0]
FBN[10:0]
Bit 0
NINT
1
0
0
0
0
COMDIV2
0xFFFF082C
0x0000
Read/write
Description
Fractional baud rate generator enable bit.
Set by the user to enable the fractional
baud rate generator.
Cleared by the 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
calculation of the baud rate using a
fractional divider and Table 94 for common
baud rate values.
N. See Equation 2 for the calculation of the
baud rate using a fractional divider and
Table 94 for common baud rate values.
Priority
1
2
3
4
Definition
No interrupt
Receive line
status
interrupt
Receive
buffer full
interrupt
Transmit
buffer empty
interrupt
Modem
status
interrupt
Clearing
Operation
Read
COMSTA0
Read COMRX
Write data to
COMTX or
read COMIID0
Read
COMSTA1
register