AT83C24B-TIRIL ATMEL [ATMEL Corporation], AT83C24B-TIRIL Datasheet - Page 4

• Manufacturer Part Number: AT83C24B-TIRIL
• Description: Smart Card Reader Interface with Power Management
• Manufacturer: ATMEL [ATMEL Corporation]

Table 1. Ports Description (Continued)
4
Pad Name
CMDVCC
CPRES
CCLK
CRST
SDA
VCC
SCL
CLK
CC4
CC8
CIO
I/O
C4
C8
LI
AT83C24
Power Supply
Pad Internal
CVCC
CVCC
CVCC
CVCC
CVCC
EVCC
EVCC
EVCC
EVCC
EVCC
VCC
VCC
VCC
Limits
8 kV+
8 kV+
8 kV+
8 kV+
8 kV+
8 kV+
3 kV+
3 kV+
3 kV+
ESD
3 kV
3 kV
3 kV
3 kV
3 kV
3 kV
(pull-up)
(pull-up)
(pull-up)
(pull-up)
(pull-up)
(pull-up)
(pull-up)
Type
open-
open-
PWR
PWR
Pad
drain
drain
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
O
O
I
I
I
Description
Microcontroller Interface Function
TWI serial data
Microcontroller Interface Function
TWI serial clock
Microcontroller Interface Function
Copy of CIO pin and high level reference for EVCC.
An external pull up to EVCC is needed on IO pin.
I/O is the reference level for EVCC if EVCC is connected to a capacitor.
This feature is unused if EVCC is connected to VCC.
Microcontroller Interface Function
Copy of Card CC4.
Microcontroller Interface Function
Copy of Card CC8.
Microcontroller Interface Function
Master Clock
Smart card interface function
Card I/O
Smart card interface function
Card C4
Smart card interface function
Card C8
Smart card interface function
Card presence
An internal Pull-up to VCC can be activated in the pad if necessary using PULLUP bit
(CONFIG1 register).
Smart card interface function
Card clock
Smart card interface function
Card reset
Microcontroller Interface Function:
Activation/Shutdown of the smart card Interface.
Supply Voltage
V
DC/DC Input
LI must be tied to VCC pin through an external coil (typically 4.7 µH) and provides the
current for the charge pump of the DC/DC converter.
It may be directly connected to VCC if the step-up converter is not used (see STEPREG
bit in CONFIG4 register and see minimum VCC values in Table 20 (class A) and
Table 21 (class B)).
CC
is used to power the internal voltage regulators and I/O buffers.
4234G–SCR–01/07