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参数资料
| 型号： | TDA8005 |
| 厂商： | NXP Semiconductors N.V. |
| 英文描述： | Low-Power Smart Card Coupler(低功耗智能卡藕合器) |
| 中文描述： | 低功耗智能卡器（低功耗智能卡藕合器） |
| 文件页数： | 8/32页 |
| 文件大小： | 198K |
| 代理商： | TDA8005 |
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1996 Sep 25
16
Philips Semiconductors
Product specication
Low-power smart card coupler
TDA8005
If no error has occurred, the UART sets the bit US0
(BUFFER EMPTY) in the STATUS REGISTER and waits
for the next character. If the next character has been
written before 12 ETU, the transmission will start at
12 ETU. If it was written after 12 ETU it will start on the
rising edge of ENABLE.
If an error has occurred, it sets the bits BUFFER EMPTY
and US4 (parity error during transmission) which warns
the microcontroller to rewrite the previous character in the
UART TRANSMIT register. If the character has been
rewritten before 13 ETU, the transmission will start at
13 ETU. If it has been written after 13 ETU it will start on
the rising edge of ENABLE.
When the transmission is completed, the microcontroller
may set the bit LCT (Last Character to Transmit) so that
the UART will force the reception mode into ready to get
the reply from the card at 12 ETU. This bit must be reset
before the end of the first reception. The bit T/R must be
reset to enable the reception of the following characters.
When the session is completed, the microcontroller
re-initializes the whole UART by resetting the bit RESET
ISO UART.
Fig.7 ISO UART transmission flow chart.
(1) The transmit register may be loaded just after reading from the status register.
(2) The software must reset the last character but before completion of the first received character.
handbook, full pagewidth
MBH637
SET TRANSMIT ENABLE
CONVERT, CALCULATE PARITY
AND LOAD IN TRANSMIT
SHIFT REGISTER
SAMPLE I/O AT 11 ETU
SET BIT TRANSMISSION PARITY
ERROR AND BUFFER EMPTY
AT 11 ETU
RESET TRANSMIT PART AND
ENABLE TRANSMIT AT 13 ETU
SHIFT EVERY ETU IF TRANSMIT
ENABLE IS SET
transmit register selected
T/R
↑
T/R = 0
LCT = 1
10th bit shifted
(1)
(2)
SET I/O BUFFER IN
RECEPTION AT 10 ETU
SET BIT BUFFER EMPTY
AT 11 ETU
RESET TRANSMIT PART AND
ENABLE TRANSMIT AT 12 ETU
RESET TRANSMIT PART AT 11 ETU
FORCE RECEPTION MODE
parity error
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TDA8005A | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Low-power 3 V/5 V smart card coupler |
| TDA8005AG | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Low-power 3 V/5 V smart card coupler |
| TDA8005AH | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Low-power 3 V/5 V smart card coupler |
| TDA8005G | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Low-power smart card coupler |
| TDA8005H | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Low-power smart card coupler |
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