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參數(shù)資料

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The following describe the limitations of Revision A of the Z84C90 KIO.

Daisy-chain. If the KIO has an Interrupt Pending during and Interrupt Acknowledge

cycle, KIO misses the status of the IE1 pin. This produces vector contention if there is a

higher interrupting device. It works fine if only one device is in the system.

#)85

There is no problem if the application has only one peripheral in the daisy chain. For two

or more peripherals in the system, a

“

hardware workaround circuit

”

is needed. Please con-

tact your local Zilog representatives to get more detailed information.

Reset. KIO requires the M1 signal to exit from Reset state. If the M1 signal is not

received, the KIO can not be programmed. This is not a problem for users of the Z80

CPU.

#85

If the CPU is other than a Z80, an M1 signal is needed to exit RESET status. Otherwise,

the KIO can not be programmed.

Port C. When Port C is used as Parallel I/O (not as SIO

’

s modem signals) and there is a

status change on PC1 or PC6, the status of SYNCA or SYNCB (SIO cell) also changes.

#)85

Before using Port C as a parallel port, set the SIO modem signal mode back to Port C. This

procedure avoids the problem.

Interrupt Acknowledge cycle. The KIO modifies the contents of the KIO control register

(specifically, the KIO modifies the daisy-chain configuration) if the CE pin is active dur-

ing the Interrupt Acknowledge cycle (with other conditions satisfied).

相關(guān)代理商/技術(shù)參數(shù)	參數(shù)描述
Z84C90-08VSC	制造商:Zilog Inc 功能描述:IC CTC/SIO/PIO 8MHZ 84C90 PLCC84
Z84C9008VSC00TR	功能描述:IC Z80 MPU KIO 84PLCC RoHS:否類別:集成電路 (IC) >> 嵌入式 - 微處理器系列:Z80 標(biāo)準(zhǔn)包裝:2 系列:MPC8xx 處理器類型:32-位 MPC8xx PowerQUICC 特點:- 速度:133MHz 電壓:3.3V 安裝類型:表面貼裝封裝/外殼:357-BBGA 供應(yīng)商設(shè)備封裝:357-PBGA（25x25）包裝:托盤
Z84C9008VSG	功能描述:輸入/輸出控制器接口集成電路 8MHz Z80 KIO RoHS:否制造商:Silicon Labs 產(chǎn)品: 輸入/輸出端數(shù)量: 工作電源電壓: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-64 封裝:Tray
Z84C9008VSGTR	制造商:Zilog Inc 功能描述:
Z84C9010ASC	功能描述:輸入/輸出控制器接口集成電路 10 MHZ Z80 KIO RoHS:否制造商:Silicon Labs 產(chǎn)品: 輸入/輸出端數(shù)量: 工作電源電壓: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-64 封裝:Tray

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