Advanced Card Systems Ltd. ACR3901T-W1, Справочное руководство

Страница: 26 / 100

ACR3901T-W1 – Reference Manual
info@acs.com.hk
Version 1.02
www.acs.com.hk
Page 26 of 100
6.1.5.6. Escape Command
This command gives access the extended features of the reader.
Command Format
Offset Field Size Value Description
0 bMessageType 1 6Bh Escape CMD Header
1 LEN1 LEN2 (wLength) 2 -
Number of extra bytes starting
from the next field for this
message, and is expressed in two
bytes long, and LEN1 is LSB
while LEN2 is MSB
3
abData1
CommandCode 1 - Command Header
4
Len (CommandLength)
1 -
Number of extra bytes starting
from the next field for this
message, and is expressed in one
byte long
5
Data
N - 0 =< N <= 255
5+N CSUM (wChecksum) 1 -
CSUM means the XOR values of
all bytes in the command
Response Data Format
Offset Field Size Value Description
0 bMessageType 1 15h Escape Response Header
1 LEN1 LEN2 (wLength) 2 -
Number of extra bytes starting
from the next field for this
message, and is expressed in two
bytes long, and LEN1 is LSB
while LEN2 is MSB
3
abData2
ResponseCode 1 - Response Header
4 Len (CommandLength) 1 -
Number of extra bytes starting
from the next field for this
message, and is expressed in one
byte long
5 Data N - 0 =< N <= 255
5+N CSUM (wChecksum) 1 -
CSUM means the XOR values of
all bytes in the command
Response Data Format (Error)
Offset Field Size Value Description
0 bMessageType 1 95h -
1 LEN1 LEN2 (wLength) 2 0200h
Number of extra bytes starting
from the next field for this
message. It is expressed in two
bytes long. LEN1 is LSB while
LEN2 is MSB.