IDTECH ViVOpay VP3320S, Integration Manual

Page: 15 / 31

ID TECH ViVOpay VP3320 User Manual
Page | 15
in a 4-byte field)
23-26 Public Key
Exponent
4 Actually, the real length of the exponent is either one byte or 3 bytes.
It can have two values: 3, or 65537.
27-28 Modulus Length 2 Indicates the length of the next field, MSB followed by LSB.
29-n Modulus Variable This is the modulus field of the public key. Its length is specified in the
field above.
Response Frame
Byte 0-9 Byte 10 Byte 11 Byte 12 Byte 13 Byte 14 Byte 15
Header Tag & Protocol
Version
Cmd status
Length
(MSB)
Length
(LSB)
CRC
(LSB)
CRC
(MSB)
ViVOtech2\0 D0h
See Key
Manager
status codes
00h 00h Calculated Calculated
7.3. Get Processor Type (09-02)
The Get Processor Type command returns a processor type TLV.
Command Frame
Response Frame
The
Get Processor Type sub-command returns a TLV string as follows:
•
Tag: 0xDF61
•
Length: 0x02
•
Value: a field representing the processor type.
The following types of processors may be identified in the
Value field:
Processor Type (hex values) Description
45 00
ARM7/ LPC21xx
4D 00
ARM Cortex-M4/ K21 Family
4E 00 ARM Cortex-M4/ K81 Family
Byte 0-9 Byte 10 Byte 11 Byte 12 Byte 13 Byte 14 Byte 15
Header Tag & Protocol Command
Sub-
Command
Data
Length
(MSB)
Data
Length
(LSB)
CRC
(LSB)
CRC
(MSB)
ViVOtech2\0
09h 02 00h 00h
Byte 0-9 Byte 10 Byte 11 Byte12 Byte 13
Byte 14 …
Byte 13+n
Byte
14+n
Byte
15+n
Header Tag &
Protocol
Command Status Code
Data
Length
(MSB)
Data
Length
(LSB)
Data
CRC
(MSB)
CRC
(LSB)
ViVOtech2\0
09h
See Status
Code Table
See below