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参数资料
| 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： | 60/101页 |
| 文件大小： | 4506K |
| 代理商： | ST7FSCR1E4U1 |
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ST7SCR1E4 ST7SCR1R4
61/101
SMARTCARD INTERFACE (Cont’d)
12.4.3.5 Card detection mechanism
The CRDDET bit in the CRDCR Register indicates
if the card presence detector (card switch) is open
or closed when a card is inserted. When the
CRDIRF bit of the CRDSR is set, it indicates that a
card is present.
To be able to power-on the smartcard, card pres-
ence is mandatory. Removing the smartcard will
automatically start the ISO7816-3 card deactiva-
tion sequence (see Section 12.4.3.6).
There is no hardware debouncing: The CRDIRF
bit changes whenever the level on the CRDDET
pin changes. The card switch can generate an in-
terrupt which can be used to wake up the device
from suspend mode and for software debouncing.
Three different cases can occur:
– The microcontroller is in run mode, waiting for
card insertion:
Card insertion generates an interrupt and the
CRDIRF bit in the CRDSR register is set. De-
bouncing is managed by software. After the time
required for debouncing, if the CRDIRF bit is set,
the CRDVCC bit in the CRDCR register is set by
software to apply the selected voltage to the
CRDVCC pin
– The microcontroller is in suspend mode and a
card is inserted:
The ST7 is woken up by the interrupt. The card
insertion is then handled in the same way as in
the previous case.
– The card is removed:
– The CRDIRF bit is reset without hardware de-
bouncing
– A Card Insertion/Removal interrupt is generat-
ed, (if enabled by the CRDIRM bit in the
MISCR2 register)
– The CRDVCC bit is immediately reset by
hardware, starting the card deactivation se-
quence.
Figure 34. Card detection block diagram
CRDDET
CRD
CRDSR
1
0
CARD INSERTION/REMOVAL
0
7
IRF
DET
CRDCR
0
7
CNF
CRD
MISCR2
0
7
IRM
Pull-up
EDGE DETECTOR
Interrupt Request
SMARTCARD INTERFACE (CRD)
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| ST7SCR1E4M1/XXX | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDSO24 |
| ST7L34F2MCRE/XXX | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDSO20 |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 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 |
| ST7FSCR1R4T1 | 功能描述:8位微控制器 -MCU 8-BIT Lw Pwr USB MCU W/ 16K FLASH RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT |
| 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 |
| ST7FUS-SK/RAIS | 制造商:STMicroelectronics 功能描述:Evaluation and Application Development with ST7Ultralite |
| ST7GEME4 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:Full-speed USB MCU with smartcard firmware and EMV/non-EMV interface |
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