Panasonic KX-P7105, KX-P7110 4.5.5.3. ROM I/F

4.5.5.3. ROM I/F
The ROM I/F, which is the basic macro in CPU ASIC ( IC1 ) for controlling external memory devices ( Mask ROM, Flash ROM ).
The control signals of ROM devices are as follows.
FRMA [21:0]: These signals constitute the external ROM address bus.
FRDATA [7:0]: These signals constitute a bidirectional data bus for external ROM.
nFRWE: This is the write strobe output signal for making external Flash ROM active.
nFROE: This is the output enable signal for Mask ROM or Flash ROM.
nFRCS0: This is the chip select output signal for standard the Mask ROM or the Flash ROM.
FRCS1: This is the chip select output signal for optional the Mask ROM or the Flash ROM.
80
KX-P7105 / KX-P7110