MCP2210
TABLE 3-31: RESPONSE 4 STRUCTURE
Byte
Index
Meaning
0
1
0x70 – SEND ACCESS Password – echos back the given command code
0xFB – Access Not Allowed – Chip conditional access is on, the password does not match and the
number of attempts is above the accepted threshold of 5. The Access Password mechanism is
temporarily blocked and no further password access will be accepted until the next power-up.
2
Don’t Care
Don’t Care
3-63
TABLE 3-32: RESPONSE 5 STRUCTURE
Byte
Index
Meaning
0
1
0x70 – SEND ACCESS Password – echos back the given command code
0x00 – Command Completed Successfully – Chip conditional access is on, the supplied password is
matching the one stored in the chip’s NVRAM.
2
Don’t Care
Don’t Care
3-63
FIGURE 3-11:
SEND ACCESS PASSWORD LOGIC FLOW
Send Access
Password
FALSE
TRUE
TRUE
Chip Settings
Protected
Chip Settings
Not Protected
Response 1
Access Granted
FALSE
Password
Protected
Permanent Lock
Response 2
Password
Attempts
< 5
FALSE
TRUE
Chip Access Rejected
Temporarily
Chip Access Lock
FALSE
Password
Matched
TRUE
Response 4
Chip Access Rejected
Response 5
Response 3
Access Granted
Chip Access Rejected
Increment
the Number of Attempts
2011 Microchip Technology Inc.
DS22288A-page 33
MICROCHIP [ MICROCHIP ]
