Brother HL-1040, HL-820, HL-1020 manual Eeprom I/O

CPU Receive Mode

STROBE

BUSY

ACK

90 µsec 0.5 µsec

DMA Receive Mode

STROBE

BUSY

ACK

1.5 µsec 0.5 µsec

BUSY goes HIGH at the falling edge of STROBE. The data (8 bits) from the PC is latched in the data buffer at the rising edge of STROBE. The pulse width of ACK differs according to the speed MODE as shown above. BUSY goes LOW at the rising edge of ACK.

<IEEE1284 support>

This supports the IEEE1284 data transfer with the following modes.

Nibble mode

Byte mode

(8)Data expansion

This circuit expands the compressed image data received from the PC, and writes the bit map data to the FIFO.

(9)Software support

Supports 16 x 16 rotation, bit expansion, and bit search.

(10)EEPROM I/O

One output port and one I/O port are assigned.

II-10