at83c24nds-tisum ATMEL Corporation, at83c24nds-tisum Datasheet - Page 12
at83c24nds-tisum
Manufacturer Part Number
at83c24nds-tisum
Description
Smart Card Reader Interface With Power Management
Manufacturer
ATMEL Corporation
Datasheet
1.AT83C24NDS-TISUM.pdf
(42 pages)
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CRST Controller
12
AT83C24
The CRST output pin is driven by the A1/RST pin signal pin or by the CARDRST bit value. This
selection depends of the CRST_SEL bit value (see CONFIG4 register).
If the CRST pin signal is driven by the CARDRST bit value, two modes are available:
•
•
Figure 6. Clock Block Diagram with Software Activation (see page 14)
Figure 7. Clock Block Diagram with Hardware Activation (see page 14)
If the ART bit is reset, CRST pin is driven by CARDRST bit.
If the ART bit is set, CRST pin is controlled and follows the “Automatic Reset Transition”
(page 15).
CMDVCC
A1/RST
A2/CK
A2/CK
CLK
CLK
CRST_SEL bit
DCK[2:0]
DCK[2:0]
CKS[2:0]
CKS[2:0]
Hardware
activation
DCCLK
DCCLK
CARDCK bit
CARDCK bit
CKSTOP bit
CKSTOP bit
DC/DC
DC/DC
1
1
0
0
CCLK
CCLK
4234F–SCR–10/05
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