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ST1335, ST1336 ST1355
5-Contact Memory Card IC 272-bit EEPROM with Advanced Security Mechanisms
DATA BRIEFING
s s
s s s
s s s s s
5 V Single Supply Voltage Counting Capability (two options) - up to 32767 (85 -1) - 8 times reloadable, up to 4095 (84-1) Active Authentication Function (ST1335/1355) Cipher Block Chaining Function (ST1355) Memory Divided into : - 16 bits of Circuit Identification - 48 bits of Card Identification - 40 bits of Count Data - 16 bits for Validation Certificate - 24 bits of Transport Code - 64 bits of Issuer Data (ST1336) or Authentication Secret Key (ST1335/1355) - 32 bits of Anti-tearing Flags (optional) - 56 bits of User data (optionally not erasable) 1 Million Erase/Write Cycle (minimum) 10 Year Data Retention (minimum) 3.5 ms Programming Time at 5 V (typical) 500 A Supply Current at 5 V (typical) 250 A Stand-by Current at 5 V (typical)
1
Micromodule (D10)
1 1
1
Micromodule (D15)
Wafer
DESCRIPTION The members of the ST1335/1336/1355 family are principally designed for use in prepaid Phonecard applications. Each is a 272-bit EEPROM device, with associated security logic and special fuses to control memory access. The memory is arranged as a matrix of 34 x 8 cells, accessed in a serial bitwise fashion for reading and programming, and in a byte-wise fashion for internal erasing. An on-chip
Figure 1. Logic Diagram
VCC
RST
Table 1. Signal Names
CLK RST I/O VCC GND Clock Reset Data Input / Output Supply Voltage
ST1335 ST1336 ST1355 CLK
I/O
GND
Ground
AI03106b
October 1999
Complete data available under NDA.
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ST1335, ST1336, ST1355
Figure 2. Memory Map
0 16 Physical EEPROM Cells 32 bits 0
16 masked bits
Circuit Identification Area Card Identification Area (ID)
RAM1 (Write-Only) (RN) (ST1335, ST1355)
32
48 bits
Data Area (CD) 40 bits 8 bits 16 bits (Counters and Transport Code) Reserved Area (RA) Certificate (CER) Issuer-Defined Area (ST1336) 64 bits Authentication Secret Key (SK) (ST1335, ST1355)
64
104 112 128
Physical EEPROM Cells
192
Reserved Area (RA) 256 260 264 288 Physical EEPROM Cells 32 bits Anti-Tearing Flags 320
4 bits 4 bits 24 bits
Signature Fuses Unused
56 bits
User-Defined Area
376
AI03385
Note: 1. The write-only RAM area (RN) is applicable only for the User Configuration.
address counter provides an internal address space of up to 512 bits. Each member of the ST1335/1336/1355 family has an identification data area, unit-counters (with an anti-tearing mechanism for reliable usage in open readers), a post validation certificate, an issuer area (ST1336) or an authentication secret
key area (ST1335/1355), and a user area. This is summarized in Figure 2. The validation certificate allows the recognition of the device by the appropriate security module. The anti-tearing mechanism guards against extra, spurious count signals being executed when the
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ST1335, ST1336, ST1355
card is unexpectedly extracted, while an operation is underway, in an open reader. OPTIONS Three options can be chosen on ordering the device: - The anti-tearing mechanism can be disconnected. In this case, the anti-tearing flag area from bit 288d to bit 319d is unused (Figure 2). - The user area, from bit 320d to bit 375d, can be defined as "not erasable" in the User Configuration. - The reload mechanism can be activated. In this case, erasing a bit in the reload counter refreshes the certificate (CER). At this time, the certificate can be programmed with a new value. ORDERING INFORMATION The notation used for the device number is as shown in Table 2. For a list of available options (speed, package, etc.) or for further information on any aspect of this device, please contact your nearest ST Sales Office.
EXTERNAL COMMANDS The device uses five contacts: VCC, GND, I/O, CLK, RST. Four commands distinct can be composed using these external pins: - RESET: to reset the internal address register to 000d - READ: to increment the internal address register and read the data bit at the new address - COMPARE: to allow comparison of the presented code against the internal transport code - PROGRAM: to program the bit at the current address CONFIGURATIONS The device works in two distinct configurations: - Issuer Configuration: for the card manufacturer. Customized data can be written to the chip, to initialize it before release to the end user. - User Configuration: for use by the end user of the card, but with restricted access.
Table 2. Ordering Information Scheme
Example: ST1335 - C W4 / XX YY
Product 35 36 55 Active Authentication Function Issuer Area Cipher Block Chaining Authentication Function
Transport Code Given by ST
Customer Code Given by the Issuer
Fuse Blow Voltage B C 6V
1
Delivery Form D10 D15 W4 W2 Micromodule on reel Micromodule on reel Wafer (180 m thickness) Wafer (280 m thickness)
5 V1
Note: 1. Please contact your nearest ST Sales Office to check on availability
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