AT83C24 ATMEL Corporation, AT83C24 Datasheet - Page 24

• Manufacturer Part Number: AT83C24
• Description: Smart Card Reader Interface with Power Management
• Manufacturer: ATMEL Corporation

24
AT83C24
Table 9. CONFIG3 (Config Byte 3)
Number
EAUTO
Bit
7-5
7
4
3
2
1
0
Mnemonic Description
ICCADJ
VEXT1
EAUTO
VEXT1
VEXT0
Bit
LP
6
X
X
X
EVCC voltage configuration:
EAUTO VEXT1 VEXT0
0
0
0
0
1
if EVCC is supplied from the external EVCC pin, the user can switch off the
internal EVCC regulator to decrease the consumption.
If EVCC is switched off, and no external EVCC is supplied, the AT83C24 is
inactive until a hardware reset is done.
The reset value is 100.
CI
This bit controls the DC/DC sensitivity to any overflow current .
Set this bit to decrease the DC/DC sensitivity (CI
20%, see Electrical Characteristics). The start of the DC/DC with a high current
load is easier.
Clear this bit to have a normal configuration.
The reset value is 0.
Low-power Mode
Set this bit to enable low-power mode during shutdown mode (pulsed mode
activated).
Clear this bit to disable low-power mode during shutdown mode.
The activation reference is the following:
• First select the Low-power mode by setting LP bit.
• The activation of SHUTDOWN bit can then be done.
This bit as no effect when SHUTDOWN bit is cleared.
The reset value is 0.
This bit should not be set.
This bit should not be set.
This bit should not be set.
CC
VEXT0
overflow adjust
5
0
0
1
1
X
ICCADJ
0 EVCC = 0 the regulator is switched off.
1EVCC = 2.3V
0 EVCC = 1.8V
X EVCC voltage is the level detected on I/O input pin.
4
1 EVCC = 2.7V
LP
3
2
X
CC_ovf
is increased by about
1
X
4234E–SCR–09/04
X
0