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參數資料
| 型號： | 73S8014BN-ILR/F |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 模擬信號調理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PDSO20 |
| 封裝： | ROHS COMPLIANT, SOP-20 |
| 文件頁數： | 9/29頁 |
| 文件大小： | 345K |
| 代理商： | 73S8014BN-ILR/F |
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DS_8014BN_057
73S8014BN Data Sheet
Rev. 1.0
17
3.6
On-Chip Oscillator and Card Clock
The 73S8014BN device has an on-chip oscillator that can generate the smart card clock using an external crystal
(connected between XTALIN and XTALOUT) to set the oscillator frequency. When the clock signal is available
from another source it can be connected to XTALIN, and XTALOUT should be left unconnected.
For this device the card clock frequency can be chosen among four different division rates, defined by multiple-
state input CLKDIV, as per the following table:
CLKDIV
CLK
MAX
XTALIN/CLKIN
(MHz)
GND
1/4 XTALIN
27
VDD/3
XTALIN
20
VDD x 2/3
1/8 XTALIN
27
VDD
1/2 XTALIN
27
Note: The clock-divider ratio must be configured prior to activation and must not change during the card session.
Note: Special care should be taken when configuring the CLKDIV input when using the power-down mode. The
CLKDIV input does not contain an internal pullup or pulldown so it must not be allowed to be left unconnected. In
addition, the CLKDIV input should be set in such a manner as to set the voltage level to GND or VDD to keep the
current consumption to an absolute minimum.
There are numerous simple methods available to control CLKDIV as shown in Figure 5.
CLKDIV PIN
HOST I/O PIN
1. Selecting between Divide by 2 (I/O HIGH) or divide by 4 (I/O LOW)
CLKDIV PIN
HOST I/O PIN
2. Selecting between Divide by 2 (IO HIGH) or divide by 8 (IO LOW)
VDD
CLKDIV PIN
HOST I/O PIN 1
HOST I/O PIN 2
3. Selecting any of the four Divide ratios
R
2R
R
Figure 5: CLKDIV Usage
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相關代理商/技術參數 |
參數描述 |
|---|---|
| 73S8014R | 制造商:TERIDIAN 制造商全稱:TERIDIAN 功能描述:Smart Card Interface |
| 73S8014R-DB | 功能描述:界面開發工具 73S8014RRN/RT Demo Brd RoHS:否 制造商:Bourns 產品:Evaluation Boards 類型:RS-485 工具用于評估:ADM3485E 接口類型:RS-485 工作電源電壓:3.3 V |
| 73S8014R-IL/F | 功能描述:I2C 接口集成電路 Smart Card Interface Comp w/8024 RoHS:否 制造商:NXP Semiconductors 電源電壓-最大:5.5 V 電源電壓-最小:2.3 V 最大工作頻率:400 KHz 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-16 |
| 73S8014R-IL/F1 | 功能描述:輸入/輸出控制器接口集成電路 RoHS:否 制造商:Silicon Labs 產品: 輸入/輸出端數量: 工作電源電壓: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風格:SMD/SMT 封裝 / 箱體:QFN-64 封裝:Tray |
| 73S8014R-IL/F2 | 功能描述:輸入/輸出控制器接口集成電路 Smart Card Interface Comp w/8024 RoHS:否 制造商:Silicon Labs 產品: 輸入/輸出端數量: 工作電源電壓: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風格:SMD/SMT 封裝 / 箱體:QFN-64 封裝:Tray |
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