Brother International HL 1240 Service Manual - Page 50
Optional serial I/O, EEPROM
UPC - 012502600855
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CHAPTER 3 THEORY OF OPERATION 1.3.5 Optional serial I/O HL-1250 The interrupt of the serial I/O is input to the EXINT terminal of the ASIC, and is recognized by the CPU. A 32-byte register is provided for this I/O, which is read from and written to by the CPU. Fig. 3-12 1.3.6 EEPROM HL-1240 The EEPROM is X24C01A type of two-wire method with a 128 x 8 bits configuration. Fig. 3-13 HL-1250 The EEPROM is X24C04 type of two-wire method with a 512 x 8 bits configuration. Fig. 3-14 3-12
CHAPTER 3
THEORY OF OPERATION
3-12
1.3.5
Optional serial I/O
The interrupt of the serial I/O is input to the EXINT terminal of the ASIC, and is recognized by
the CPU.
A 32-byte register is provided for this I/O, which is read from and written to by the
CPU.
Fig. 3-12
1.3.6
EEPROM
The EEPROM is X24C01A type of two-wire method with a 128 x 8 bits configuration.
Fig. 3-13
The EEPROM is X24C04 type of two-wire method with a 512 x 8 bits configuration.
Fig. 3-14
HL-1250
HL-1240
HL-1250