Bus Width And Multiplexing - Intel 8XC196NT User Manual

8XC196NT USER'S MANUAL
CCR2
The chip configuration register 2 (CCR2) supports extended addressing. It selects either 64-Kbyte or
1-Mbyte addressing mode and controls whether the internal OTPROM is mapped into both page
0FFH and page 00H or into page FFH only. This register is loaded from CCB2 if the LDCCB2 bit (bit 0)
of CCR1 is set; otherwise, it is loaded with FFH
7
— —
Bit Bit
Number Mnemonic
7:3 —
2 REMAP
1 MODE64
0 —
Figure 14-3. Chip Configuration 2 (CCR2) Register

14.4 BUS WIDTH AND MULTIPLEXING

The external bus can operate as either a 16-bit multiplexed address/data bus or as a multiplexed
16-bit address/8-bit data bus (Figure 14-4).
14-10
— —
Reserved; always write as ones.
OTPROM Mapping
Controls the internal OTPROM mapping.
0 = maps to page FFH only
1 = maps to page 00H and FFH
Addressing Mode:
Selects 64-Kbyte or 1-Mbyte addressing.
0 = selects 1-Mbyte addressing
1 = selects 64-Kbyte addressing
Reserved; always write as zero.
Address:
Reset State:
— REMAP MODE64
Function
FF201CH
XXH
0
—