AT83C24-PRRIL ATMEL [ATMEL Corporation], AT83C24-PRRIL Datasheet - Page 8

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

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
1. Reset
2. Write config
3. Write Timer
4. Write Interface
5. General Call
Reset
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 following four bytes in CONFIG1, CONFIG2, CONFIG3 then CONFIG4 regis-
ters. 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.
Address Byte
(See Table 2)
0100 A
0100 A
0100 A
0100 A
0000 0000
b7
2
2
2
2
A
A
A
A
1
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
X
b3
Data Byte
1
CONFIG1
TIMER1
b2
X
b1
X
Data Byte
2
CONFIG2
TIMER0
b0
X
Data Byte
3
CONFIG3
4234E–SCR–09/04
Data Byte
4
CONFIG4