Intermec 074787-001 User Manual

All data after bit 5 is “don’t care.” Conversion data is received starting from 
bit 7. (MSB first) Data received before this is “don’t care.”

For R1, the ADC (U16) should only be used when U32 is enabled.

The 802.11 module has not yet been selected. If a Compact Flash card is 
selected, this section will describe the interface. For now, the interface can 
be ignored.

The print controller circuit is based on a reference design from Seiko 
Instruments. The document, “IFV001-01B Interface Board Technical 
Reference” from Seiko provides many details on how to control the print 
engine. This document will highlight the design differences from the Seiko 
reference design. 

The U1 GPIO pins used for the print controller should be configured as 
shown:

• Active outputs – PE14-PE21, PE24, PE26-PE28, PE30

• Inputs – PA3, PB24 

All of the above should be configured as GPIO except PB24, which should 
be assigned to its dedicated peripheral function, SMC receive.

The print controller and print head logic supply is 5 V and is sourced from 
linear regulator U32. U32 has an enable pin that allows the microprocessor 
to disconnect power to the print controller. To conserve power while not 
printing, U1 should disable the 5 V regulator by setting PC_PWR_EN 
(PE24) to output low. 

0

0

0

0

1

1

0

0

2

0

0

1

3

1

0

1

4

0

1

0

5

1

1

0

6

0

1

1

7

1

1

1