AT88SC0404C-PI Atmel, AT88SC0404C-PI Datasheet - Page 44

• Manufacturer Part Number: AT88SC0404C-PI
• Manufacturer: Atmel

Specifications of AT88SC0404C-PI

• Operating Temperature (max): 85C
• Operating Temperature (min): -40C
• Package Type: PDIP
• Mounting: Through Hole
• Pin Count: 8
• Operating Temperature Classification: Industrial
• Lead Free Status / RoHS Status: Not Compliant

9.3.
5211C–SMIC–01/10
Atmel AT88SC0104/0204/0404/0808/1616/3216/6416/12816/25616C
PPS Support
All Atmel
Selection (PPS) protocol, Section 7 of ISO 7816-3. This section only applies to these larger devices; CryptoMemory
devices with memory sizes 16-Kbit or smaller do not support PPS.
At the end of an ATR sequence, subsequent to either a cold or a warm reset initiated by the reader, the device will be
expecting either a ‘Class’ byte as part of a command header, or the initial character, PPSS, of a PPS request. If the
device receives a byte = $FF, it will process subsequent incoming bytes as a PPS request. In all other cases, it will
proceed with command processing. There are 4 bytes that comprise a PPS request or response;
• Initial Character PPSS. Always equal to $FF
• Format Character PPS0. CryptoMemory supports two response values for PPS0, $00 and $01. See ISO 7816 for
• Parameter Character PPS1. Encodes Fn and Dn in the same manner as TA(1) in the ATR
• Checksum PCK
The following table shows the PPS1 values supported by CryptoMemory devices with memory sizes 32-Kbits and
above.
Table 33. PPS1 Values Atmel CryptoMemory Supports
After the ATR, the reader will have the choice of proceeding with commands using default values of F=372 and D=1
(9600-baud at 3.5712MHz), or negotiating values Fn and Dn through a PPS exchange. Following, are four examples of
PPS requests and responses:
further definition of PPS0
0001b
0010b
0011b
0100b
0101b
1000b
Dl
®
CryptoMemory
®
devices with user memory size 32-Kbits and larger support the Protocol and Parameter
16
12
Dl
1
2
4
8
baud rate
baud rate
baud rate
baud rate
baud rate
baud rate
f Max
PPS1
PPS1
PPS1
PPS1
PPS1
PPS1
F/D
F/D
F/D
F/D
F/D
F/D
Fl
Fl
153600
115200
0000b
19200
38400
76800
4MHz
23.25
9600
46.5
372
372
186
01
02
03
93
04
05
08
31
153600
115200
0001b
19200
38400
76800
5MHz
23.25
9600
46.5
372
372
186
11
12
13
93
14
15
18
31
111600
1001b
55800
5MHz
372
94
64
95
32
43