8 - 2 Symbol MS4404/MS4407 Integration Guide
Table 8-1 lists all the SSI Opcodes supported by the decoder. It identifies the SSI partner allowed to send a
message of each type. The host transmits Opcodes designated type H. The decoder transmits type D Opcodes,
and either partner can transmit Host/Decoder (H/D) types.
The details of the SSI protocol can be found in the Simple Serial Interface Programmer's Guide (72-40451-xx).
Table 8-1
SSI Commands
Name Type Opcode Description
AIM_OFF H 0xC4 Deactivate aim pattern.
AIM_ON H 0xC5 Activ ate aim pattern.
BEEP H 0 xE6 Sound the beeper.
CAPABILITIES_REPLY D 0xD4 Reply to CAPABILITIES_REQUEST; contains a list of the
capabilities and commands supported by the decoder.
CAPABILITIES_REQUEST H 0xD3 Request capabilities report from the decoder.
CMD_ACK H/D 0xD0 Positive acknowledgment of received packet.
CMD_NAK H/D 0xD1 Negative acknowledgment of received packet.
DECODE_DATA D 0xF3 Decode data in SSI packet format.
EVENT D 0xF6 Event indicated by associated event code.
LED_OFF H 0xE8 De-activate LED output.
LED_ON H 0xE7 Activate LED output.
PARAM_DEFAULTS H 0xC8 Set parameter default values.
PARAM_REQUEST H 0xC7 Request values of certain parameters.
PARAM_SEND H/D 0xC6 Send parameter values.
REPLY_ID D 0xA6 Reply to REQUEST_ID; contains decoder's serial number.
REPLY_REVISION D 0xA4 Reply to REQ_REV contains decoder's software/har dware
configuration.
REQUEST_REVISION H 0xA3 Request the decoder's configuration.
SCAN_DISABLE H 0xEA Prevent the operator from scanning bar codes.
SCAN_ENABLE H 0xE9 Permit bar code scanning.
SLEEP H 0xEB Request to place the decoder into low power.
START_DECODE H 0xE4 Tell decoder to attempt to decode a bar code.
STOP_DECODE H 0xE5 Tell decoder to abort a decode attempt.
WAKEUP H N/A Wakeup decoder after it has entered low power mode.