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| 型号： | DS8007A-EAG+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 29/41页 |
| 文件大小： | 0K |
| 描述： | IC INTERFACE SMART CARD 48-LQFP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 104 |
| 应用： | 智能卡 |
| 接口： | 并联 |
| 电源电压： | 2.7 V ~ 6 V |
| 封装/外壳： | 48-LQFP |
| 供应商设备封装： | 48-LQFP（7x7） |
| 包装： | 管件 |
| 安装类型： | 表面贴装 |
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DS8007A
Multiprotocol Dual Smart Card Interface
______________________________________________________________________________________
35
Character Encoding/
Decoding Convention
The ISO UART is designed to support two possible char-
acter encoding/decoding formats: direct and inverted.
The direct character coding convention transmits and
receives data LSb first and associates a high logic level
with a bit 1 and a low logic level with a bit 0. The inverse
character coding convention transmits and receives
data most significant bit first and associates a high logic
level with a bit 0 and a low logic level with a bit 1.
The UCR1.CONV bit defines which character conven-
tion (CONV = 0:inverse; CONV = 1:direct) should be
used by the ISO UART. The UCR1.CONV bit can be
configured by the host device software or be config-
ured by hardware if automatic convention detection has
been enabled.
Automatic Convention Detection
The automatic convention detection relies upon recog-
nition of a predefined pattern in the first character
received (TS character) in ATR for establishing future
character coding convention. To enable automatic con-
vention detection, the UCR1.SS bit must be set to logic
1 and the UCR2.AUTOC bit should be configured to
logic 0 prior to ATR. The SS bit is automatically cleared
by hardware 10.5 ETU after the character is received. If
automatic convention detection is enabled and an
unrecognized character is received, the CONV bit is
not written. If neither the direct nor inverse character
are detected, a parity error occurs along with error sig-
nal generation for the T = 0 protocol. The AUTOC bit
should not be modified during a card session.
Framing Error Detection
The DS8007A monitors the selected card I/Ox signal at
10.25 ETU following each detected start bit. If the I/Ox
signal is not in the high state at this point in time, the
USR.FER (framing error) bit is set to 1 at 10.5 ETU. The
FER bit is cleared to 0 whenever USR is read.
TS CHARACTER
(CONVEYS CODING CONVENTION)
DIRECT CONVENTION (BYTE = 3Bh)
INVERSE CONVENTION (BYTE = 3Fh)
LSb
11
1
0
00
11
1
0
1
MSb
LSb
Figure 12. Direct, Inverse Character Coding Conventions
ISO UART
URR
I/OA
I/OB
I/OAUX
fCLKx
2 x fCLKx
START DETECT
ETU
FIFO(8)
UTR
PDR.PD[7:0]
GTR.GTR.[7:0]
UCR1
UCR2
CSR.RIU
MSR.FE
MSR.BGT
MSR.TBE/RBF
USR.EA
FCR.PEC[2:0]
FCR.FL[2:0]
USR.PE
USR.OVR
USR.FER
Figure 13. ISO UART Signal Interface
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS8007A-EAG+ | 功能描述:接口 - 专用 Multiprotocol Dual Smart Card Interface RoHS:否 制造商:Texas Instruments 产品类型:1080p60 Image Sensor Receiver 工作电源电压:1.8 V 电源电流:89 mA 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:BGA-59 |
| DS8007A-EAG+T | 功能描述:接口 - 专用 Multiprotocol Dual Smart Card Interface RoHS:否 制造商:Texas Instruments 产品类型:1080p60 Image Sensor Receiver 工作电源电压:1.8 V 电源电流:89 mA 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:BGA-59 |
| DS8007-ENG | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:Multiprotocol Dual Smart Card Interface |
| DS8007-ENG+ | 功能描述:接口 - 专用 Multiprotocol Dual Smart Card Interface RoHS:否 制造商:Texas Instruments 产品类型:1080p60 Image Sensor Receiver 工作电源电压:1.8 V 电源电流:89 mA 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:BGA-59 |
| DS8007-KIT | 功能描述:界面开发工具 DS8007 Eval Kit RoHS:否 制造商:Bourns 产品:Evaluation Boards 类型:RS-485 工具用于评估:ADM3485E 接口类型:RS-485 工作电源电压:3.3 V |
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