Brother HL-1440 Service Manual page 62

CHAPTER 3 THEORY OF OPERATION
1.3.3 Flash ROM (for HL-1470N only)
HL-1470N
Two 8 Mbits flash ROMs (x 16 bit) are fitted.
1.3.4 DRAM
HL-1230/1440
A 16M-bit DRAM (x 16 bits) is used as the RAM.
Fig. 3-12
Fig. 3-13
3-12