ADUC702X_1 Datasheet, PDF (52/78 Pages) Analog Devices – Precision Analog Microcontroller 12-bit Analog I/O, ARM7TDMI MCU

ADuC702x Series
Preliminary Technical Data
Bit
Name
7
6
TEMT
5
THRE
4
BI
3
FE
2
PE
1
OE
0
DR
Table 38: COMSTA0 MMR Bit Descriptions
Description
Reserved
COMTX empty status bit
Set automatically if COMTX is empty
Cleared automatically when writing to COMTX
COMTX and COMRX empty
Set automatically if COMTX and COMRX are empty
Cleared automatically when one of the register receives data
Break error
Set when SIN is held low for more than the maximum word length
Cleared automatically
Framing error
Set when invalid stop bit
Cleared automatically
Parity error
Set when a parity error occurs
Cleared automatically
Overrun error
Set automatically if data are overwrite before been read
Cleared automatically
Data ready
Set automatically when COMRX is full
Cleared by reading COMRX
Bit
Name
7-4
3
EDSSI
2
ELSI
1
ETBEI
0
ERBFI
Table 39: COMIEN0 MMR Bit Descriptions
Description
Reserved
Modem status interrupt enable bit
Set by user to enable generation of an interrupt if any of COMSTA1[3:0] are set
Cleared by user
RX status interrupt enable bit
Set by user to enable generation of an interrupt if any of COMSTA0[3:0] are set
Cleared by user
Enable transmit buffer empty interrupt
Set by user to enable interrupt when buffer is empty during a transmission
Cleared by user
Enable receive buffer full interrupt
Set by user to enable interrupt when buffer is full during a reception
Cleared by user
Bit 2-1
Status bits
00
11
10
01
00
Bit 0
NINT
1
0
0
0
0
Priority
1
2
3
4
Table 40: COMIID0 MMR Bit Descriptions
Definition
Clearing operation
No interrupt
Receive line status interrupt
Receive buffer full interrupt
Transmit buffer empty interrupt
Modem status interrupt
Read COMSTA0
Read COMRX
Write data to COMTX or read COMIID0
Read COMSTA1 register
Rev. PrA | Page 52 of 78