at83c24nds-tisum ATMEL Corporation, at83c24nds-tisum Datasheet - Page 8
at83c24nds-tisum
Manufacturer Part Number
at83c24nds-tisum
Description
Smart Card Reader Interface With Power Management
Manufacturer
ATMEL Corporation
Datasheet
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Write Commands
8
AT83C24
The write commands are:
1. Reset:
2. Write Config:
3. Write Timer:
4. Write Interface:
5. General Call Reset:
Table 3. Write Commands Description
Figure 3. Command byte format for Write CONFIG0 command
Initializes all the logic and the TWI interface as after a power-up or power-fail reset. If a
smart card is active when RESET falls, a deactivation sequence is performed. This is a one-
byte command.
Configures the device according to the last six bits in the CONFIG0 register and to the fol-
lowing four bytes in CONFIG1, CONFIG2, CONFIG3 then CONFIG4 registers. This is a
five bytes command.
Program the 16-bit automatic reset transition timer with the following two bytes. This is a
three bytes command.
Program the interface. This is a one-byte command. The MSB of the command byte is fixed
at 0.
A general call followed by the value 06h has the same effect as a Reset command.
1. Reset
2. Write config
3. Write Timer
4. Write Interface
5. General Call
Reset
Address Byte
(See Table 2)
0100 A
0100 A
0100 A
0100 A
0000 0000
b7
2
2
2
2
1
A
A
A
A
1
1
1
1
A
A
A
A
0
0
0
0
0
0
0
0
b6
0
Command Byte
1111 1111
(10 + CONFIG0 6
bits)
1111 1100
(0+INTERFACE 7
bits)
0000 0110
b5
X
CONFIG0 on 6 Bits
b4
X
b3
X
Data Byte
1
CONFIG1
TIMER1
b2
X
b1
X
Data Byte
2
CONFIG2
TIMER0
b0
X
Data Byte
3
CONFIG3
4234F–SCR–10/05
Data Byte
4
CONFIG4
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