參數(shù)資料
型號(hào)： 8XC51FB
廠商： NXP Semiconductors N.V.
英文描述： Low power single card reader
中文描述： 低功耗單卡讀卡器
文件頁(yè)數(shù)： 34/58頁(yè)
文件大小： 233K
代理商： 8XC51FB
2003 Oct 30
34
Philips Semiconductors
Product specification
Low power single card reader
TDA8029
8.10.2.4
FIFO Control Register (FCR)
Table 50
FIFO control register, address Ch, write
Table 51
Description of register bits
0
TBE/RBF
Transmit Buffer Empty/Receive Buffer Full.
This bit is set when:
Changing from reception mode to transmission mode
A character has been transmitted by the UART (except when a character has been
parity error free transmitted whilst LCT = 1)
The reception buffer is full.
This bit is reset:
After power-on
When bit RIU in register CSR is reset
When a character has been written in register UTR
When the character has been read from register URR
When changing from transmission mode to reception mode.
BIT
7
6
5
4
3
2
1
0
Symbol
Reset value
PEC2
0
PEC1
0
PEC0
0
FL2
0
FL1
0
FL0
0
BIT
SYMBOL
DESCRIPTION
7
PEC[2:0]
Not used.
Parity Error Counter.
These bits determine the number of parity errors before setting bit
PE in register USR and pulling INT0_N LOW. PEC[2:0] = 000 means that if only one
parity error has occurred, bit PE is set; PEC[2:0] = 111 means that bit PE will be set
after 8 parity errors.
6 to 4
In protocol T = 0:
If a correct character is received before the programmed error number is reached, the
error counter will be reset
If the programmed number of allowed parity errors is reached, bit PE in register USR
will be set as long as the USR has not been read
If a transmitted character is NAKed by the card, then the TDA8029 will automatically
retransmit it a number of times equal to the value programmed in PEC[2:0]. The
character will be resent at 15 ETU.
In transmission mode, if PEC[2:0] = 000, then the automatic retransmission is
invalidated. The character manually rewritten in register UTR will start at 13.5 ETU.
In protocol T = 1:
The error counter has no action (bit PE is set at the first wrong received character).
Not used.
FIFO Length.
These bits determine the depth of the FIFO: FL[2:0] = 000 means length
1, FL[2:0] = 111 means length 8.
3
FL[2:0]
2 to 0
BIT
SYMBOL
DESCRIPTION
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