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AT83C24B-PRRUL

更新时间： 2024-01-23 09:59:59

品牌	Logo	应用领域
爱特美尔 - ATMEL		微控制器和处理器外围集成电路 uCs集成电路 uPs集成电路异步传输模式 ATM
页数	文件大小	规格书
42页	551K
描述
Smart Card Reader Interface with Power Management

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技术参数
数据手册

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AT83C24B-PRRUL 技术参数

是否Rohs认证：	符合	生命周期：	Active
包装说明：	SOP, SOP28,.56	Reach Compliance Code：	compliant
风险等级：	5.08	JESD-30 代码：	R-PDSO-G28
JESD-609代码：	e3	湿度敏感等级：	3
端子数量：	28	最高工作温度：	85 °C
最低工作温度：	-40 °C	封装主体材料：	PLASTIC/EPOXY
封装代码：	SOP	封装等效代码：	SOP28,.56
封装形状：	RECTANGULAR	封装形式：	SMALL OUTLINE
电源：	3/5 V	认证状态：	Not Qualified
子类别：	Other Microprocessor ICs	表面贴装：	YES
温度等级：	INDUSTRIAL	端子面层：	Matte Tin (Sn) - annealed
端子形式：	GULL WING	端子节距：	1.27 mm
端子位置：	DUAL	uPs/uCs/外围集成电路类型：	MICROPROCESSOR CIRCUIT
Base Number Matches：	1

AT83C24B-PRRUL 数据手册

–

over-current detection on CVCC

VCARDERR bit set in CONFIG0 register (out of range voltage on CVCC or bit set by

software)

Card Presence Detection

The card presence is provided by the CPRES pin. The polarity of card presence contact is

selected with the CARDDET bit (see CONFIG1 register). A programmable filtering is controlled

with the CDS[2-0] bits (see CONFIG1 register).

An internal pull-up on the CPRES pin can be disconnected in order to reduce the consumption,

an external pull-up must then be connected to VCC. The PULLUP bit (see CONFIG1 register)

controls this feature.

The card presence switch is usually connected to Vss (card present if CPRES=1). The CARD-

DET bit must be set. The internal pull up can be connected.

If the card presence contact is connected to Vcc (card present if CPRES=0), the internal pull-up

must be disconnected (see PULLUP bit) and an external pull-down must be connected to the

CPRES pin.

An interrupt can be generated if a card is inserted or extracted (see interrupts §).

Figure 4. Card Presence Input

VCC

External

Pull-up

VCC

(See Table 18)

Card

Contact

Presence

Internal

Pull-up

PULLUP Bit

CARDDET Bit

= 1 Closed

= 0 Open

= 1 No Card if CPRES = 0

= 0 No Card if CPRES = 1

VSS

VCC

CPRES

FILTERING

EVCC

= 1 Closed

= 0 Open

CDS[2-0]

Card

CARDIN bit

INT_PULLUP Bit

Contact

IT_SEL Bit

Presence

= 1 Card Inserted

= 0 No Card

PRES/INT

External

Pull-down

IT Controller

VSS

AT83C24

4234F–SCR–10/05

1...7 8 91011 12 13...42

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