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Unit 3: Interface Secifications
SATO MB2i Service Manual PN 9001145B Page 3-6
The IrCOMM protocol runs on top of IrDA and supports the emulation of a peer device similar to
what’s connecting it by a serial or parallel cable for applications that access those ports through
the operating system. Since various communication and printing applications utilize cables
differently, cable emulation must account for those differences.
IrOBEX is a communictions protocol that facilitates the exchange of binary objects between
devices and functions similar to HTTP in that a client uses a reliable transport to connect to a
server to request or provide objects. The appropriate firmware must be installed for this to
function.
This is a one-way communications protocol so therefore flow control and printer response are
absent.
IRDA SPECIFICATIONS (IRCOMM PROTOCOL)
Baud Rate 9600, 19200, 38400, 57600, 115200
Data Bit Length 8
Stop Bit 1
Parity Bit None, Odd, Even
Codes Used ASC-II: 7 bit, Graphics: 8 bit.
Control Codes STX (02h), ETX (03h), ACK (06h), NAK (15h).
Communication Time Time-Out: 5.99 seconds, Retry: over 500 milliseconds.
Receiving Type Single item.
Operations Mode 3-wire cooked
IRDA SPECIFICATIONS (IrOBEX PROTOCOL)
Baud Rate 9600, 19200, 38400, 57600, 115200
Data Bit Length 8
Stop Bit 1
Parity Bit None, Odd, Even
Codes Used ASC-II: 7 bit, Graphics: 8 bit.
Control Codes STX (02h), ETX (03h), ACK (06h), NAK (15h).
Communication Time Time-Out: 5.99 seconds, Retry: over 500 milliseconds.
Receiving Type Single item.