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| 型号： | ST7FSCR1E4U1 |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, QCC64 |
| 封装： | QFN-64 |
| 文件页数： | 55/101页 |
| 文件大小： | 4506K |
| 代理商： | ST7FSCR1E4U1 |
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ST7SCR1E4 ST7SCR1R4
57/101
12.4 SMARTCARD INTERFACE (CRD)
12.4.1 Introduction
The Smartcard Interface (CRD) provides all the re-
quired signals for acting as a smartcard interface
device.
The interface is electrically compatible with (and
certifiable to) the ISO7816, EMV, GSM and WHQL
standards.
Both synchronous (e.g. memory cards) and asyn-
chronous smartcards (e.g. microprocessor cards)
are supported.
The CRD generates the required voltages to be
applied to the smartcard lines.
The power-off sequence is managed by the CRD.
Card insertion or card removal is detected by the
CRD using a card presence switch connected to
the external CRDDET pin. If a card is removed, the
CRD automatically deactivates the smartcard us-
ing the ISO7816 deactivation sequence.
An maskable interrupt is generated when a card is
inserted or removed.
Any malfunction is reported to the microcontroller
via the Smartcard Interrupt Pending Register
(CRDIPR) and Smartcard Status (CRDSR) Regis-
ters.
12.4.2 Main features
■ Support for ISO 7816-3 standard
■ Character mode
■ 1 transmit buffer and 1 receive buffer
■ 4-Mhz fixed card clock
■ 11-bit etu (elementary time unit) counter
■ 9-bit guardtime counter
■ 24-bit general purpose waiting time counter
■ Parity generation and checking
■ Automatic character repetition on parity error
detection in transmission mode
■ Automatic retry on parity error detection in
reception mode
■ Card
power-off
deactivation
sequence
generation
■ Manual mode for driving the card I/O directly for
synchronous protocols
12.4.3 Functional Description
Figure 31 gives an overview of the smartcard inter-
face.
Figure 31. Smartcard Interface Block Diagram
CLK
SEL
CRD
CLK
CRDCCR
IO
CRD
CRD CRD
RST VCC
C8
CRD
C4
CRD
CRDIO
CRDC4
CRDC8
CRDRST
CRDCLK
CRDDET
0
1
UART SHIFT REGISTER
CRDRXB
CRDTXB
UART RECEIVE BUFFER
UART TRANSMIT BUFFER
CARD DETECTION
CARD INSERTION/
CRDVCC
POWER-OFF LOGIC
CLOCK
CONTROL
UART BIT
11-BIT
4 MHz
ETU COUNTER
9-BIT GUARDTIME COUNTER
24-BIT WAITING TIME COUNTER
PARITY GENERATION/CHECKING
COMMUNICATIONS CONTROL
CRD INTERRUPT
LOGIC
REMOVAL INTERRUPT
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相关代理商/技术参数 |
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| ST7FSCR1R4 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:8-BIT LOW-POWER, FULL-SPEED USB MCU WITH 16K FLASH, 768 RAM, SMARTCARD I/F, TIMER |
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| ST7FUS-PRIMER | 功能描述:程序设计器 - 基于处理器 Low-Cost Eval Dev Tool Pack RoHS:否 制造商:Olimex Ltd. 产品:Programmers 工具用于评估:XMEGA, MegaAVR, tinyAVR 核心:AVR 接口类型:USB 工作电源电压:1.8 V to 5.5 V |
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