参数资料
型号: 73S1215F-EB-LITE
厂商: Maxim Integrated Products
文件页数: 129/136页
文件大小: 0K
描述: BOARD EVAL 73S1215F CBL/DOC/CD
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 1
系列: *
73S1215F Data Sheet
DS_1215F_003
92
Rev. 1.4
Card Status/Control Register (CRDCtl): 0xFE05
0x00
This register is used to configure the card detect pin (DETCARD) and monitor card detect status. This
register be written to properly configure Debounce, Detect_Polarity (= 0 or = 1), and the pull-up/down
enable before setting CDETEN. The card detect logic is functional even without smart card logic clock.
When the PWRDN bit is set = 1, no debounce is provided but card presence is operable.
MSB
LSB
DEBOUN CDETEN
DETPOL
PUENB
PDEN
CARDIN
Bit
Symbol
Function
CRDCtl.7
DEBOUN
Debounce – When set = 1, this will enable hardware de-bounce
of the card detect pin. The de-bounce function shall wait for
64ms of stable card detect assertion before setting the CARDIN
bit. This counter/timer uses the keypad clock as a source of
1kHz signal. De-assertion of the CARDIN bit is immediate upon
de-assertion of the card detect pin(s).
CRDCtl.6
CDETEN
Card Detect Enable – When set = 1, activates card detection
input. Default upon power-on reset is 0.
CRDCtl.5
CRDCtl.4
CRDCtl.3
DETPOL
Detect Polarity – When set = 1, the DETCARD pin shall interpret
a logic 1 as card present.
CRDCtl.2
PUENB
Enable pull-up current on DETCARD pin (active low).
CRDCtl.1
PDEN
Enable pull-down current on DETCARD pin.
CRDCtl.0
CARDIN
Card Inserted – (Read only). 1 = card inserted, 0 = card not
inserted. A change in the value of this bit is a “card event.” A
read of this bit indicates whether smart card is inserted or not
inserted in conjunction with the DETPOL setting.
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