Zilog Z16C30 Uživatelský manuál stáhnout pdf (Strana 166)

8-11

Z16C30 USC

USER'S MANUAL

ZILOG

UM97USC0100

14 13 12 11 10 9 8 7 6 5 4 3 2 1 015

Reserved (Must be zero)

Bus Configuration Register (BCR) No Address (First Write after /RESET)

SepAd

16Bit

2Pulse

IACK

SRight

Bit(s)

Field/Bit

Name

Conditions

/Context

Description

Status

Ref Chapter: Section

BCR15 SepAd

1 if AD13-8 carry register addresses

WO 2: Bus Configuration Register

8-bit bus

Must be 0

16-bit bus

BCR2 16-Bit 0=8-bit data on AD7-0; 1=16-bit data on AD15-0

BCR1 2PulseIACK 0=one pulse on /PITACK per interrupt

acknowledge; 1 = two pulses (Intel compatible)

BCR0 SRightA 1=use AD6-0 as B/W, RegAddr, U/L

0=use AD7-1

Muxed AD

/PITACK

used

RW = Read/Write, RO = Read Only, WO = Write Only – for other codes see p. 8-10.

UM009402-0201

1 2 ... 161 162 163 164 165 166 167 168 169 170 171 ... 207 208

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Zilog Z16C30 Uživatelský manuál Strana 166