Z8018020VSC Просмотр технического описания (PDF) - Zilog

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Z8018020VSC

ENHANCED Z180 MICROPROCESSOR

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Z80180/Z8S180/Z8L180

Enhanced Z180 Microprocessor

IOA7, 6: I/O Address Relocation (bits 7,6). IOA7 and the high-order 8 bits of 16-bit internal I/O address are al-

IOA6 relocate internal I/O as shown in Figure 85. Note that ways 0. IOA7 and IOA6 are cleared to 0 during Reset.

1

IOA7-IOA6 = 1 1

IOA7-IOA6 = 1 0

IOA7- IOA6 = 0 1

IOA7-IOA6 = 0 0

00FFH

00COH

00BFH

008OH

007OH

004OH

003FH

000OH

Figure 85. I/O Address Relocation

IOSTP. IOSTOP Mode (bit 5). IOSTOP mode is enabled

when IOSTP is set to 1. Normal I/O operation resumes

when IOSTOP is reprogrammed or Reset to 0

DS971800401

PRELIMINARY

1-65

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