Dynamic Ram (Ic503) - Panasonic KX-FM89BX Service Manual

Note*:
This memory is incorporated into the ASIC (IC501) and used for the image processing.
Fig. A shows the memory map of the Image Data RAM.
6.3.4. ROM (IC502)
This 512KB ROM (EPROM or MASKROM) carries a common area of 32KB and bank areas which
each have 8KB (BK4~BK63). The addresses from 0000H to 7FFFH are for the common area and
from 8000H to 9FFFH are for the bank areas.
6.3.5. STATIC RAM (IC504)
This 32KB RAM carries a common area of 8KB and bank areas which each have 12KB. The
addresses from 0000H to EFFFH are for the common area and from A000H to CFFFH are for the
bank area.

6.3.6. DYNAMIC RAM (IC503)

The DRAM serves as CPU and receives memory.
The address is F200H~F3FFH (DRAM access window 1) and F600H~F7FFH (DRAM access
window 2).
Descriptions of Pin Distribution (IC501)
168