參數(shù)資料
型號(hào): EVAL-ADUC7121QSPZ
廠商: Analog Devices Inc
文件頁數(shù): 57/96頁
文件大?。?/td> 0K
描述: BOARD EVALUATION FOR ADUC7121
設(shè)計(jì)資源: ADUC7121 Gerber Files
ADUC7121 Schematic
標(biāo)準(zhǔn)包裝: 1
系列: MicroConverter® ADuC7xxx
類型: MCU
適用于相關(guān)產(chǎn)品: ADUC7121
所含物品: 板,CD
ADuC7121
Data Sheet
Rev. B | Page 60 of 96
UART Status Register 0
Name:
COMSTA0
Address:
0xFFFF0814
Default value:
0x60
Access:
Read only
Function:
This 8-bit read-only register reflects the current status on the UART.
Table 85. COMSTA0 MMR Bit Designations
Bit
Name
Description
7
Reserved.
6
TEMT
COMTX and shift register empty status bit.
Set automatically if COMTX and the shift register are empty. This bit indicates that the data has
been transmitted, that is, no more data is present in the shift register.
Cleared automatically when writing to COMTX.
5
THRE
COMTX empty status bit.
Set automatically if COMTX is empty. COMTX can be written as soon as this bit is set; the previous
data might not have been transmitted yet and can still be present in the shift register.
Cleared automatically when writing to COMTX.
4
BI
Break indicator.
Set when SIN of the P1.0/SIN/SCL1/PLAI[7] pin is held low for more than the maximum word
length.
Cleared automatically.
3
FE
Framing error.
Set when the stop bit is invalid.
Cleared automatically.
2
PE
Parity error.
Set when a parity error occurs.
Cleared automatically.
1
OE
Overrun error.
Set automatically if data are overwritten before being read.
Cleared automatically.
0
DR
Data ready.
Set automatically when COMRX is full.
Cleared by reading COMRX.
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